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diff --git a/doc/administration/reference_architectures/10k_users.md b/doc/administration/reference_architectures/10k_users.md index 5367021af4e..fe2dad41066 100644 --- a/doc/administration/reference_architectures/10k_users.md +++ b/doc/administration/reference_architectures/10k_users.md @@ -1,76 +1,2047 @@ -# Reference architecture: up to 10,000 users +--- +reading_time: true +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers +--- -This page describes GitLab reference architecture for up to 10,000 users. -For a full list of reference architectures, see +# Reference architecture: up to 10,000 users **(PREMIUM ONLY)** + +This page describes GitLab reference architecture for up to 10,000 users. For a +full list of reference architectures, see [Available reference architectures](index.md#available-reference-architectures). > - **Supported users (approximate):** 10,000 -> - **High Availability:** True -> - **Test RPS rates:** API: 200 RPS, Web: 20 RPS, Git: 20 RPS - -| Service | Nodes | Configuration ([8](#footnotes)) | GCP | AWS | Azure | -|--------------------------------------------------------------|-------|---------------------------------|----------------|-----------------------|----------------| -| GitLab Rails ([1](#footnotes)) | 3 | 32 vCPU, 28.8GB Memory | n1-highcpu-32 | c5.9xlarge | F32s v2 | -| PostgreSQL | 3 | 4 vCPU, 15GB Memory | n1-standard-4 | m5.xlarge | D4s v3 | -| PgBouncer | 3 | 2 vCPU, 1.8GB Memory | n1-highcpu-2 | c5.large | F2s v2 | -| Gitaly ([2](#footnotes)) ([5](#footnotes)) ([7](#footnotes)) | X | 16 vCPU, 60GB Memory | n1-standard-16 | m5.4xlarge | D16s v3 | -| Redis ([3](#footnotes)) - Cache | 3 | 4 vCPU, 15GB Memory | n1-standard-4 | m5.xlarge | D4s v3 | -| Redis ([3](#footnotes)) - Queues / Shared State | 3 | 4 vCPU, 15GB Memory | n1-standard-4 | m5.xlarge | D4s v3 | -| Redis Sentinel ([3](#footnotes)) - Cache | 3 | 1 vCPU, 1.7GB Memory | g1-small | t2.small | B1MS | -| Redis Sentinel ([3](#footnotes)) - Queues / Shared State | 3 | 1 vCPU, 1.7GB Memory | g1-small | t2.small | B1MS | -| Consul | 3 | 2 vCPU, 1.8GB Memory | n1-highcpu-2 | c5.large | F2s v2 | -| Sidekiq | 4 | 4 vCPU, 15GB Memory | n1-standard-4 | m5.xlarge | D4s v3 | -| Object Storage ([4](#footnotes)) | - | - | - | - | - | -| NFS Server ([5](#footnotes)) ([7](#footnotes)) | 1 | 4 vCPU, 3.6GB Memory | n1-highcpu-4 | c5.xlarge | F4s v2 | -| Monitoring node | 1 | 4 vCPU, 3.6GB Memory | n1-highcpu-4 | c5.xlarge | F4s v2 | -| External load balancing node ([6](#footnotes)) | 1 | 2 vCPU, 1.8GB Memory | n1-highcpu-2 | c5.large | F2s v2 | -| Internal load balancing node ([6](#footnotes)) | 1 | 2 vCPU, 1.8GB Memory | n1-highcpu-2 | c5.large | F2s v2 | - -## Footnotes - -1. In our architectures we run each GitLab Rails node using the Puma webserver - and have its number of workers set to 90% of available CPUs along with four threads. For - nodes that are running Rails with other components the worker value should be reduced - accordingly where we've found 50% achieves a good balance but this is dependent - on workload. - -1. Gitaly node requirements are dependent on customer data, specifically the number of - projects and their sizes. We recommend two nodes as an absolute minimum for HA environments - and at least four nodes should be used when supporting 50,000 or more users. - We also recommend that each Gitaly node should store no more than 5TB of data - and have the number of [`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) - set to 20% of available CPUs. Additional nodes should be considered in conjunction - with a review of expected data size and spread based on the recommendations above. - -1. Recommended Redis setup differs depending on the size of the architecture. - For smaller architectures (less than 3,000 users) a single instance should suffice. - For medium sized installs (3,000 - 5,000) we suggest one Redis cluster for all - classes and that Redis Sentinel is hosted alongside Consul. - For larger architectures (10,000 users or more) we suggest running a separate - [Redis Cluster](../redis/replication_and_failover.md#running-multiple-redis-clusters) for the Cache class - and another for the Queues and Shared State classes respectively. We also recommend - that you run the Redis Sentinel clusters separately for each Redis Cluster. - -1. For data objects such as LFS, Uploads, Artifacts, etc. We recommend an [Object Storage service](../object_storage.md) - over NFS where possible, due to better performance and availability. - -1. NFS can be used as an alternative for both repository data (replacing Gitaly) and - object storage but this isn't typically recommended for performance reasons. Note however it is required for - [GitLab Pages](https://gitlab.com/gitlab-org/gitlab-pages/-/issues/196). - -1. Our architectures have been tested and validated with [HAProxy](https://www.haproxy.org/) - as the load balancer. Although other load balancers with similar feature sets - could also be used, those load balancers have not been validated. - -1. We strongly recommend that any Gitaly or NFS nodes be set up with SSD disks over - HDD with a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write - as these components have heavy I/O. These IOPS values are recommended only as a starter - as with time they may be adjusted higher or lower depending on the scale of your - environment's workload. If you're running the environment on a Cloud provider - you may need to refer to their documentation on how configure IOPS correctly. - -1. The architectures were built and tested with the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) - CPU platform on GCP. On different hardware you may find that adjustments, either lower - or higher, are required for your CPU or Node counts accordingly. For more information, a - [Sysbench](https://github.com/akopytov/sysbench) benchmark of the CPU can be found - [here](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). +> - **High Availability:** Yes +> - **Test requests per second (RPS) rates:** API: 200 RPS, Web: 20 RPS, Git: 20 RPS + +| Service | Nodes | Configuration | GCP | AWS | Azure | +|--------------------------------------------|-------------|-------------------------|-----------------|-------------|----------| +| External load balancing node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Consul | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| PostgreSQL | 3 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| PgBouncer | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Internal load balancing node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Redis - Cache | 3 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| Redis - Queues / Shared State | 3 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| Redis Sentinel - Cache | 3 | 1 vCPU, 1.7GB memory | g1-small | t2.small | B1MS | +| Redis Sentinel - Queues / Shared State | 3 | 1 vCPU, 1.7GB memory | g1-small | t2.small | B1MS | +| Gitaly | 2 (minimum) | 16 vCPU, 60GB memory | n1-standard-16 | m5.4xlarge | D16s v3 | +| Sidekiq | 4 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| GitLab Rails | 3 | 32 vCPU, 28.8GB memory | n1-highcpu-32 | c5.9xlarge | F32s v2 | +| Monitoring node | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | +| Object Storage | n/a | n/a | n/a | n/a | n/a | +| NFS Server | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | + +The Google Cloud Platform (GCP) architectures were built and tested using the +[Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) +CPU platform. On different hardware you may find that adjustments, either lower +or higher, are required for your CPU or node counts. For more information, see +our [Sysbench](https://github.com/akopytov/sysbench)-based +[CPU benchmark](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). + +For data objects (such as LFS, Uploads, or Artifacts), an +[object storage service](#configure-the-object-storage) is recommended instead +of NFS where possible, due to better performance and availability. Since this +doesn't require a node to be set up, *Object Storage* is noted as not +applicable (n/a) in the previous table. + +## Setup components + +To set up GitLab and its components to accommodate up to 10,000 users: + +1. [Configure the external load balancing node](#configure-the-external-load-balancer) + that will handle the load balancing of the three GitLab application services nodes. +1. [Configure Consul](#configure-consul). +1. [Configure PostgreSQL](#configure-postgresql), the database for GitLab. +1. [Configure PgBouncer](#configure-pgbouncer). +1. [Configure the internal load balancing node](#configure-the-internal-load-balancer) +1. [Configure Redis](#configure-redis). +1. [Configure Gitaly](#configure-gitaly), + which provides access to the Git repositories. +1. [Configure Sidekiq](#configure-sidekiq). +1. [Configure the main GitLab Rails application](#configure-gitlab-rails) + to run Puma/Unicorn, Workhorse, GitLab Shell, and to serve all frontend requests (UI, API, Git + over HTTP/SSH). +1. [Configure Prometheus](#configure-prometheus) to monitor your GitLab environment. +1. [Configure the Object Storage](#configure-the-object-storage) + used for shared data objects. +1. [Configure NFS (Optional)](#configure-nfs-optional) + to have shared disk storage service as an alternative to Gitaly and/or Object Storage (although + not recommended). NFS is required for GitLab Pages, you can skip this step if you're not using + that feature. + +We start with all servers on the same 10.6.0.0/24 private network range, they +can connect to each other freely on those addresses. + +Here is a list and description of each machine and the assigned IP: + +- `10.6.0.10`: External Load Balancer +- `10.6.0.11`: Consul 1 +- `10.6.0.12`: Consul 2 +- `10.6.0.13`: Consul 3 +- `10.6.0.21`: PostgreSQL primary +- `10.6.0.22`: PostgreSQL secondary 1 +- `10.6.0.23`: PostgreSQL secondary 2 +- `10.6.0.31`: PgBouncer 1 +- `10.6.0.32`: PgBouncer 2 +- `10.6.0.33`: PgBouncer 3 +- `10.6.0.40`: Internal Load Balancer +- `10.6.0.51`: Redis - Cache Primary +- `10.6.0.52`: Redis - Cache Replica 1 +- `10.6.0.53`: Redis - Cache Replica 2 +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 +- `10.6.0.61`: Redis - Queues Primary +- `10.6.0.62`: Redis - Queues Replica 1 +- `10.6.0.63`: Redis - Queues Replica 2 +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 +- `10.6.0.91`: Gitaly 1 +- `10.6.0.92`: Gitaly 2 +- `10.6.0.101`: Sidekiq 1 +- `10.6.0.102`: Sidekiq 2 +- `10.6.0.103`: Sidekiq 3 +- `10.6.0.104`: Sidekiq 4 +- `10.6.0.111`: GitLab application 1 +- `10.6.0.112`: GitLab application 2 +- `10.6.0.113`: GitLab application 3 +- `10.6.0.121`: Prometheus + +## Configure the external load balancer + +NOTE: **Note:** +This architecture has been tested and validated with [HAProxy](https://www.haproxy.org/) +as the load balancer. Although other load balancers with similar feature sets +could also be used, those load balancers have not been validated. + +In an active/active GitLab configuration, you will need a load balancer to route +traffic to the application servers. The specifics on which load balancer to use +or the exact configuration is beyond the scope of GitLab documentation. We hope +that if you're managing multi-node systems like GitLab you have a load balancer of +choice already. Some examples including HAProxy (open-source), F5 Big-IP LTM, +and Citrix Net Scaler. This documentation will outline what ports and protocols +you need to use with GitLab. + +The next question is how you will handle SSL in your environment. +There are several different options: + +- [The application node terminates SSL](#application-node-terminates-ssl). +- [The load balancer terminates SSL without backend SSL](#load-balancer-terminates-ssl-without-backend-ssl) + and communication is not secure between the load balancer and the application node. +- [The load balancer terminates SSL with backend SSL](#load-balancer-terminates-ssl-with-backend-ssl) + and communication is *secure* between the load balancer and the application node. + +### Application node terminates SSL + +Configure your load balancer to pass connections on port 443 as `TCP` rather +than `HTTP(S)` protocol. This will pass the connection to the application node's +NGINX service untouched. NGINX will have the SSL certificate and listen on port 443. + +See the [NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for details on managing SSL certificates and configuring NGINX. + +### Load balancer terminates SSL without backend SSL + +Configure your load balancer to use the `HTTP(S)` protocol rather than `TCP`. +The load balancer will then be responsible for managing SSL certificates and +terminating SSL. + +Since communication between the load balancer and GitLab will not be secure, +there is some additional configuration needed. See the +[NGINX proxied SSL documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#supporting-proxied-ssl) +for details. + +### Load balancer terminates SSL with backend SSL + +Configure your load balancer(s) to use the 'HTTP(S)' protocol rather than 'TCP'. +The load balancer(s) will be responsible for managing SSL certificates that +end users will see. + +Traffic will also be secure between the load balancer(s) and NGINX in this +scenario. There is no need to add configuration for proxied SSL since the +connection will be secure all the way. However, configuration will need to be +added to GitLab to configure SSL certificates. See +[NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for details on managing SSL certificates and configuring NGINX. + +### Ports + +The basic ports to be used are shown in the table below. + +| LB Port | Backend Port | Protocol | +| ------- | ------------ | ------------------------ | +| 80 | 80 | HTTP (*1*) | +| 443 | 443 | TCP or HTTPS (*1*) (*2*) | +| 22 | 22 | TCP | + +- (*1*): [Web terminal](../../ci/environments/index.md#web-terminals) support requires + your load balancer to correctly handle WebSocket connections. When using + HTTP or HTTPS proxying, this means your load balancer must be configured + to pass through the `Connection` and `Upgrade` hop-by-hop headers. See the + [web terminal](../integration/terminal.md) integration guide for + more details. +- (*2*): When using HTTPS protocol for port 443, you will need to add an SSL + certificate to the load balancers. If you wish to terminate SSL at the + GitLab application server instead, use TCP protocol. + +If you're using GitLab Pages with custom domain support you will need some +additional port configurations. +GitLab Pages requires a separate virtual IP address. Configure DNS to point the +`pages_external_url` from `/etc/gitlab/gitlab.rb` at the new virtual IP address. See the +[GitLab Pages documentation](../pages/index.md) for more information. + +| LB Port | Backend Port | Protocol | +| ------- | ------------- | --------- | +| 80 | Varies (*1*) | HTTP | +| 443 | Varies (*1*) | TCP (*2*) | + +- (*1*): The backend port for GitLab Pages depends on the + `gitlab_pages['external_http']` and `gitlab_pages['external_https']` + setting. See [GitLab Pages documentation](../pages/index.md) for more details. +- (*2*): Port 443 for GitLab Pages should always use the TCP protocol. Users can + configure custom domains with custom SSL, which would not be possible + if SSL was terminated at the load balancer. + +#### Alternate SSH Port + +Some organizations have policies against opening SSH port 22. In this case, +it may be helpful to configure an alternate SSH hostname that allows users +to use SSH on port 443. An alternate SSH hostname will require a new virtual IP address +compared to the other GitLab HTTP configuration above. + +Configure DNS for an alternate SSH hostname such as `altssh.gitlab.example.com`. + +| LB Port | Backend Port | Protocol | +| ------- | ------------ | -------- | +| 443 | 22 | TCP | + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Consul + +The following IPs will be used as an example: + +- `10.6.0.11`: Consul 1 +- `10.6.0.12`: Consul 2 +- `10.6.0.13`: Consul 3 + +NOTE: **Note:** +The configuration processes for the other servers in your reference architecture will +use the `/etc/gitlab/gitlab-secrets.json` file from your Consul server to connect +with the other servers. + +To configure Consul: + +1. SSH into the server that will host Consul. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['consul_role'] + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + server: true, + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Consul nodes, and + make sure you set up the correct IPs. + +NOTE: **Note:** +A Consul leader will be elected when the provisioning of the third Consul server is completed. +Viewing the Consul logs `sudo gitlab-ctl tail consul` will display +`...[INFO] consul: New leader elected: ...` + +You can list the current Consul members (server, client): + +```shell +sudo /opt/gitlab/embedded/bin/consul members +``` + +You can verify the GitLab services are running: + +```shell +sudo gitlab-ctl status +``` + +The output should be similar to the following: + +```plaintext +run: consul: (pid 30074) 76834s; run: log: (pid 29740) 76844s +run: logrotate: (pid 30925) 3041s; run: log: (pid 29649) 76861s +run: node-exporter: (pid 30093) 76833s; run: log: (pid 29663) 76855s +``` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure PostgreSQL + +In this section, you'll be guided through configuring an external PostgreSQL database +to be used with GitLab. + +### Provide your own PostgreSQL instance + +If you're hosting GitLab on a cloud provider, you can optionally use a +managed service for PostgreSQL. For example, AWS offers a managed Relational +Database Service (RDS) that runs PostgreSQL. + +If you use a cloud-managed service, or provide your own PostgreSQL: + +1. Set up PostgreSQL according to the + [database requirements document](../../install/requirements.md#database). +1. Set up a `gitlab` username with a password of your choice. The `gitlab` user + needs privileges to create the `gitlabhq_production` database. +1. Configure the GitLab application servers with the appropriate details. + This step is covered in [Configuring the GitLab Rails application](#configure-gitlab-rails). + +### Standalone PostgreSQL using Omnibus GitLab + +The following IPs will be used as an example: + +- `10.6.0.21`: PostgreSQL primary +- `10.6.0.22`: PostgreSQL secondary 1 +- `10.6.0.23`: PostgreSQL secondary 2 + +First, make sure to [install](https://about.gitlab.com/install/) +the Linux GitLab package **on each node**. Following the steps, +install the necessary dependencies from step 1, and add the +GitLab package repository from step 2. When installing GitLab +in the second step, do not supply the `EXTERNAL_URL` value. + +#### PostgreSQL primary node + +1. SSH into the PostgreSQL primary node. +1. Generate a password hash for the PostgreSQL username/password pair. This assumes you will use the default + username of `gitlab` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<postgresql_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 gitlab + ``` + +1. Generate a password hash for the PgBouncer username/password pair. This assumes you will use the default + username of `pgbouncer` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<pgbouncer_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 pgbouncer + ``` + +1. Generate a password hash for the Consul database username/password pair. This assumes you will use the default + username of `gitlab-consul` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<consul_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 gitlab-consul + ``` + +1. On the primary database node, edit `/etc/gitlab/gitlab.rb` replacing values noted in the `# START user configuration` section: + + ```ruby + # Disable all components except PostgreSQL and Repmgr and Consul + roles ['postgres_role'] + + # PostgreSQL configuration + postgresql['listen_address'] = '0.0.0.0' + postgresql['hot_standby'] = 'on' + postgresql['wal_level'] = 'replica' + postgresql['shared_preload_libraries'] = 'repmgr_funcs' + + # Disable automatic database migrations + gitlab_rails['auto_migrate'] = false + + # Configure the Consul agent + consul['services'] = %w(postgresql) + + # START user configuration + # Please set the real values as explained in Required Information section + # + # Replace PGBOUNCER_PASSWORD_HASH with a generated md5 value + postgresql['pgbouncer_user_password'] = '<pgbouncer_password_hash>' + # Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value + postgresql['sql_user_password'] = '<postgresql_password_hash>' + # Set `max_wal_senders` to one more than the number of database nodes in the cluster. + # This is used to prevent replication from using up all of the + # available database connections. + postgresql['max_wal_senders'] = 4 + postgresql['max_replication_slots'] = 4 + + # Replace XXX.XXX.XXX.XXX/YY with Network Address + postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24) + repmgr['trust_auth_cidr_addresses'] = %w(127.0.0.1/32 10.6.0.0/24) + + ## Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on for monitoring + node_exporter['listen_address'] = '0.0.0.0:9100' + postgres_exporter['listen_address'] = '0.0.0.0:9187' + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + # + # END user configuration + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### PostgreSQL secondary nodes + +1. On both the secondary nodes, add the same configuration specified above for the primary node + with an additional setting (`repmgr['master_on_initialization'] = false`) that will inform `gitlab-ctl` that they are standby nodes initially + and there's no need to attempt to register them as a primary node: + + ```ruby + # Disable all components except PostgreSQL and Repmgr and Consul + roles ['postgres_role'] + + # PostgreSQL configuration + postgresql['listen_address'] = '0.0.0.0' + postgresql['hot_standby'] = 'on' + postgresql['wal_level'] = 'replica' + postgresql['shared_preload_libraries'] = 'repmgr_funcs' + + # Disable automatic database migrations + gitlab_rails['auto_migrate'] = false + + # Configure the Consul agent + consul['services'] = %w(postgresql) + + # Specify if a node should attempt to be primary on initialization. + repmgr['master_on_initialization'] = false + + # Replace PGBOUNCER_PASSWORD_HASH with a generated md5 value + postgresql['pgbouncer_user_password'] = '<pgbouncer_password_hash>' + # Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value + postgresql['sql_user_password'] = '<postgresql_password_hash>' + # Set `max_wal_senders` to one more than the number of database nodes in the cluster. + # This is used to prevent replication from using up all of the + # available database connections. + postgresql['max_wal_senders'] = 4 + postgresql['max_replication_slots'] = 4 + + # Replace with your network addresses + postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24) + repmgr['trust_auth_cidr_addresses'] = %w(127.0.0.1/32 10.6.0.0/24) + + ## Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on for monitoring + node_exporter['listen_address'] = '0.0.0.0:9100' + postgres_exporter['listen_address'] = '0.0.0.0:9187' + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/database.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### PostgreSQL post-configuration + +SSH into the **primary node**: + +1. Open a database prompt: + + ```shell + gitlab-psql -d gitlabhq_production + ``` + +1. Make sure the `pg_trgm` extension is enabled (it might already be): + + ```shell + CREATE EXTENSION pg_trgm; + ``` + +1. Exit the database prompt by typing `\q` and Enter. + +1. Verify the cluster is initialized with one node: + + ```shell + gitlab-ctl repmgr cluster show + ``` + + The output should be similar to the following: + + ```plaintext + Role | Name | Upstream | Connection String + ----------+----------|----------|---------------------------------------- + * master | HOSTNAME | | host=HOSTNAME user=gitlab_repmgr dbname=gitlab_repmgr + ``` + +1. Note down the hostname or IP address in the connection string: `host=HOSTNAME`. We will + refer to the hostname in the next section as `<primary_node_name>`. If the value + is not an IP address, it will need to be a resolvable name (via DNS or + `/etc/hosts`) + +SSH into the **secondary node**: + +1. Set up the repmgr standby: + + ```shell + gitlab-ctl repmgr standby setup <primary_node_name> + ``` + + Do note that this will remove the existing data on the node. The command + has a wait time. + + The output should be similar to the following: + + ```console + Doing this will delete the entire contents of /var/opt/gitlab/postgresql/data + If this is not what you want, hit Ctrl-C now to exit + To skip waiting, rerun with the -w option + Sleeping for 30 seconds + Stopping the database + Removing the data + Cloning the data + Starting the database + Registering the node with the cluster + ok: run: repmgrd: (pid 19068) 0s + ``` + +Before moving on, make sure the databases are configured correctly. Run the +following command on the **primary** node to verify that replication is working +properly and the secondary nodes appear in the cluster: + +```shell +gitlab-ctl repmgr cluster show +``` + +The output should be similar to the following: + +```plaintext +Role | Name | Upstream | Connection String +----------+---------|-----------|------------------------------------------------ +* master | MASTER | | host=<primary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr + standby | STANDBY | MASTER | host=<secondary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr + standby | STANDBY | MASTER | host=<secondary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr +``` + +If the 'Role' column for any node says "FAILED", check the +[Troubleshooting section](troubleshooting.md) before proceeding. + +Also, check that the `repmgr-check-master` command works successfully on each node: + +```shell +su - gitlab-consul +gitlab-ctl repmgr-check-master || echo 'This node is a standby repmgr node' +``` + +This command relies on exit codes to tell Consul whether a particular node is a master +or secondary. The most important thing here is that this command does not produce errors. +If there are errors it's most likely due to incorrect `gitlab-consul` database user permissions. +Check the [Troubleshooting section](troubleshooting.md) before proceeding. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure PgBouncer + +Now that the PostgreSQL servers are all set up, let's configure PgBouncer. +The following IPs will be used as an example: + +- `10.6.0.31`: PgBouncer 1 +- `10.6.0.32`: PgBouncer 2 +- `10.6.0.33`: PgBouncer 3 + +1. On each PgBouncer node, edit `/etc/gitlab/gitlab.rb`, and replace + `<consul_password_hash>` and `<pgbouncer_password_hash>` with the + password hashes you [set up previously](#postgresql-primary-node): + + ```ruby + # Disable all components except Pgbouncer and Consul agent + roles ['pgbouncer_role'] + + # Configure PgBouncer + pgbouncer['admin_users'] = %w(pgbouncer gitlab-consul) + + pgbouncer['users'] = { + 'gitlab-consul': { + password: '<consul_password_hash>' + }, + 'pgbouncer': { + password: '<pgbouncer_password_hash>' + } + } + + # Configure Consul agent + consul['watchers'] = %w(postgresql) + consul['enable'] = true + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + + # Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + + NOTE: **Note:** + If an error `execute[generate databases.ini]` occurs, this is due to an existing + [known issue](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/4713). + It will be resolved when you run a second `reconfigure` after the next step. + +1. Create a `.pgpass` file so Consul is able to + reload PgBouncer. Enter the PgBouncer password twice when asked: + + ```shell + gitlab-ctl write-pgpass --host 127.0.0.1 --database pgbouncer --user pgbouncer --hostuser gitlab-consul + ``` + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) once again + to resolve any potential errors from the previous steps. +1. Ensure each node is talking to the current primary: + + ```shell + gitlab-ctl pgb-console # You will be prompted for PGBOUNCER_PASSWORD + ``` + +1. Once the console prompt is available, run the following queries: + + ```shell + show databases ; show clients ; + ``` + + The output should be similar to the following: + + ```plaintext + name | host | port | database | force_user | pool_size | reserve_pool | pool_mode | max_connections | current_connections + ---------------------+-------------+------+---------------------+------------+-----------+--------------+-----------+-----------------+--------------------- + gitlabhq_production | MASTER_HOST | 5432 | gitlabhq_production | | 20 | 0 | | 0 | 0 + pgbouncer | | 6432 | pgbouncer | pgbouncer | 2 | 0 | statement | 0 | 0 + (2 rows) + + type | user | database | state | addr | port | local_addr | local_port | connect_time | request_time | ptr | link | remote_pid | tls + ------+-----------+---------------------+---------+----------------+-------+------------+------------+---------------------+---------------------+-----------+------+------------+----- + C | pgbouncer | pgbouncer | active | 127.0.0.1 | 56846 | 127.0.0.1 | 6432 | 2017-08-21 18:09:59 | 2017-08-21 18:10:48 | 0x22b3880 | | 0 | + (2 rows) + ``` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +### Configure the internal load balancer + +If you're running more than one PgBouncer node as recommended, then at this time you'll need to set +up a TCP internal load balancer to serve each correctly. + +The following IP will be used as an example: + +- `10.6.0.40`: Internal Load Balancer + +Here's how you could do it with [HAProxy](https://www.haproxy.org/): + +```plaintext +global + log /dev/log local0 + log localhost local1 notice + log stdout format raw local0 + +defaults + log global + default-server inter 10s fall 3 rise 2 + balance leastconn + +frontend internal-pgbouncer-tcp-in + bind *:6432 + mode tcp + option tcplog + + default_backend pgbouncer + +backend pgbouncer + mode tcp + option tcp-check + + server pgbouncer1 10.6.0.21:6432 check + server pgbouncer2 10.6.0.22:6432 check + server pgbouncer3 10.6.0.23:6432 check +``` + +Refer to your preferred Load Balancer's documentation for further guidance. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Redis + +Using [Redis](https://redis.io/) in scalable environment is possible using a **Primary** x **Replica** +topology with a [Redis Sentinel](https://redis.io/topics/sentinel) service to watch and automatically +start the failover procedure. + +Redis requires authentication if used with Sentinel. See +[Redis Security](https://redis.io/topics/security) documentation for more +information. We recommend using a combination of a Redis password and tight +firewall rules to secure your Redis service. +You are highly encouraged to read the [Redis Sentinel](https://redis.io/topics/sentinel) documentation +before configuring Redis with GitLab to fully understand the topology and +architecture. + +The requirements for a Redis setup are the following: + +1. All Redis nodes must be able to talk to each other and accept incoming + connections over Redis (`6379`) and Sentinel (`26379`) ports (unless you + change the default ones). +1. The server that hosts the GitLab application must be able to access the + Redis nodes. +1. Protect the nodes from access from external networks + ([Internet](https://gitlab.com/gitlab-org/gitlab-foss/uploads/c4cc8cd353604bd80315f9384035ff9e/The_Internet_IT_Crowd.png)), + using a firewall. + +In this section, you'll be guided through configuring two external Redis clusters +to be used with GitLab. The following IPs will be used as an example: + +- `10.6.0.51`: Redis - Cache Primary +- `10.6.0.52`: Redis - Cache Replica 1 +- `10.6.0.53`: Redis - Cache Replica 2 +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 +- `10.6.0.61`: Redis - Queues Primary +- `10.6.0.62`: Redis - Queues Replica 1 +- `10.6.0.63`: Redis - Queues Replica 2 +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 + +NOTE: **Providing your own Redis instance:** +Managed Redis from cloud providers such as AWS ElastiCache will work. If these +services support high availability, be sure it is **not** the Redis Cluster type. +Redis version 5.0 or higher is required, as this is what ships with +Omnibus GitLab packages starting with GitLab 13.0. Older Redis versions +do not support an optional count argument to SPOP which is now required for +[Merge Trains](../../ci/merge_request_pipelines/pipelines_for_merged_results/merge_trains/index.md). +Note the Redis node's IP address or hostname, port, and password (if required). +These will be necessary when configuring the +[GitLab application servers](#configure-gitlab-rails) later. + +### Configure the Redis and Sentinel Cache cluster + +This is the section where we install and set up the new Redis Cache instances. + +NOTE: **Note:** +Redis nodes (both primary and replica) will need the same password defined in +`redis['password']`. At any time during a failover the Sentinels can +reconfigure a node and change its status from primary to replica and vice versa. + +#### Configure the primary Redis Cache node + +1. SSH into the **Primary** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_master_role' + roles ['redis_master_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.51' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # Set up password authentication for Redis (use the same password in all nodes). + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Prevent database migrations from running on upgrade + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +#### Configure the replica Redis Cache nodes + +1. SSH into the **replica** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_replica_role' + roles ['redis_replica_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.52' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # The same password for Redis authentication you set up for the primary node. + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + # The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.51' + + # Port of primary Redis server, uncomment to change to non default. Defaults + # to `6379`. + #redis['master_port'] = 6379 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Prevent database migrations from running on upgrade + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other replica nodes, and + make sure to set up the IPs correctly. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +These values don't have to be changed again in `/etc/gitlab/gitlab.rb` after +a failover, as the nodes will be managed by the [Sentinels](#configure-the-sentinel-cache-nodes), and even after a +`gitlab-ctl reconfigure`, they will get their configuration restored by +the same Sentinels. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/redis.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### Configure the Sentinel Cache nodes + +NOTE: **Note:** +If you are using an external Redis Sentinel instance, be sure +to exclude the `requirepass` parameter from the Sentinel +configuration. This parameter will cause clients to report `NOAUTH +Authentication required.`. [Redis Sentinel 3.2.x does not support +password authentication](https://github.com/antirez/redis/issues/3279). + +Now that the Redis servers are all set up, let's configure the Sentinel +servers. The following IPs will be used as an example: + +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 + +To configure the Sentinel Cache server: + +1. SSH into the server that will host Consul/Sentinel. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['redis_sentinel_role'] + + ## Must be the same in every sentinel node + redis['master_name'] = 'gitlab-redis-cache' + + ## The same password for Redis authentication you set up for the primary node. + redis['master_password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + ## The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.51' + + ## Define a port so Redis can listen for TCP requests which will allow other + ## machines to connect to it. + redis['port'] = 6379 + + ## Port of primary Redis server, uncomment to change to non default. Defaults + ## to `6379`. + #redis['master_port'] = 6379 + + ## Configure Sentinel's IP + sentinel['bind'] = '10.6.0.71' + + ## Port that Sentinel listens on, uncomment to change to non default. Defaults + ## to `26379`. + #sentinel['port'] = 26379 + + ## Quorum must reflect the amount of voting sentinels it take to start a failover. + ## Value must NOT be greater then the amount of sentinels. + ## + ## The quorum can be used to tune Sentinel in two ways: + ## 1. If a the quorum is set to a value smaller than the majority of Sentinels + ## we deploy, we are basically making Sentinel more sensible to primary failures, + ## triggering a failover as soon as even just a minority of Sentinels is no longer + ## able to talk with the primary. + ## 1. If a quorum is set to a value greater than the majority of Sentinels, we are + ## making Sentinel able to failover only when there are a very large number (larger + ## than majority) of well connected Sentinels which agree about the primary being down.s + sentinel['quorum'] = 2 + + ## Consider unresponsive server down after x amount of ms. + #sentinel['down_after_milliseconds'] = 10000 + + ## Specifies the failover timeout in milliseconds. It is used in many ways: + ## + ## - The time needed to re-start a failover after a previous failover was + ## already tried against the same primary by a given Sentinel, is two + ## times the failover timeout. + ## + ## - The time needed for a replica replicating to a wrong primary according + ## to a Sentinel current configuration, to be forced to replicate + ## with the right primary, is exactly the failover timeout (counting since + ## the moment a Sentinel detected the misconfiguration). + ## + ## - The time needed to cancel a failover that is already in progress but + ## did not produced any configuration change (REPLICAOF NO ONE yet not + ## acknowledged by the promoted replica). + ## + ## - The maximum time a failover in progress waits for all the replica to be + ## reconfigured as replicas of the new primary. However even after this time + ## the replicas will be reconfigured by the Sentinels anyway, but not with + ## the exact parallel-syncs progression as specified. + #sentinel['failover_timeout'] = 60000 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Consul/Sentinel nodes, and + make sure you set up the correct IPs. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +### Configure the Redis and Sentinel Queues cluster + +This is the section where we install and set up the new Redis Queues instances. + +NOTE: **Note:** +Redis nodes (both primary and replica) will need the same password defined in +`redis['password']`. At any time during a failover the Sentinels can +reconfigure a node and change its status from primary to replica and vice versa. + +#### Configure the primary Redis Queues node + +1. SSH into the **Primary** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_master_role' + roles ['redis_master_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.61' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # Set up password authentication for Redis (use the same password in all nodes). + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + ``` + +1. Only the primary GitLab application server should handle migrations. To + prevent database migrations from running on upgrade, add the following + configuration to your `/etc/gitlab/gitlab.rb` file: + + ```ruby + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +#### Configure the replica Redis Queues nodes + +1. SSH into the **replica** Redis Queue server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_replica_role' + roles ['redis_replica_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.62' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # The same password for Redis authentication you set up for the primary node. + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + # The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.61' + + # Port of primary Redis server, uncomment to change to non default. Defaults + # to `6379`. + #redis['master_port'] = 6379 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other replica nodes, and + make sure to set up the IPs correctly. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +These values don't have to be changed again in `/etc/gitlab/gitlab.rb` after +a failover, as the nodes will be managed by the [Sentinels](#configure-the-sentinel-queues-nodes), and even after a +`gitlab-ctl reconfigure`, they will get their configuration restored by +the same Sentinels. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/redis.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### Configure the Sentinel Queues nodes + +NOTE: **Note:** +If you are using an external Redis Sentinel instance, be sure +to exclude the `requirepass` parameter from the Sentinel +configuration. This parameter will cause clients to report `NOAUTH +Authentication required.`. [Redis Sentinel 3.2.x does not support +password authentication](https://github.com/antirez/redis/issues/3279). + +Now that the Redis servers are all set up, let's configure the Sentinel +servers. The following IPs will be used as an example: + +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 + +To configure the Sentinel Queues server: + +1. SSH into the server that will host Sentinel. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['redis_sentinel_role'] + + ## Must be the same in every sentinel node + redis['master_name'] = 'gitlab-redis-persistent' + + ## The same password for Redis authentication you set up for the primary node. + redis['master_password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + ## The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.61' + + ## Define a port so Redis can listen for TCP requests which will allow other + ## machines to connect to it. + redis['port'] = 6379 + + ## Port of primary Redis server, uncomment to change to non default. Defaults + ## to `6379`. + #redis['master_port'] = 6379 + + ## Configure Sentinel's IP + sentinel['bind'] = '10.6.0.81' + + ## Port that Sentinel listens on, uncomment to change to non default. Defaults + ## to `26379`. + #sentinel['port'] = 26379 + + ## Quorum must reflect the amount of voting sentinels it take to start a failover. + ## Value must NOT be greater then the amount of sentinels. + ## + ## The quorum can be used to tune Sentinel in two ways: + ## 1. If a the quorum is set to a value smaller than the majority of Sentinels + ## we deploy, we are basically making Sentinel more sensible to primary failures, + ## triggering a failover as soon as even just a minority of Sentinels is no longer + ## able to talk with the primary. + ## 1. If a quorum is set to a value greater than the majority of Sentinels, we are + ## making Sentinel able to failover only when there are a very large number (larger + ## than majority) of well connected Sentinels which agree about the primary being down.s + sentinel['quorum'] = 2 + + ## Consider unresponsive server down after x amount of ms. + #sentinel['down_after_milliseconds'] = 10000 + + ## Specifies the failover timeout in milliseconds. It is used in many ways: + ## + ## - The time needed to re-start a failover after a previous failover was + ## already tried against the same primary by a given Sentinel, is two + ## times the failover timeout. + ## + ## - The time needed for a replica replicating to a wrong primary according + ## to a Sentinel current configuration, to be forced to replicate + ## with the right primary, is exactly the failover timeout (counting since + ## the moment a Sentinel detected the misconfiguration). + ## + ## - The time needed to cancel a failover that is already in progress but + ## did not produced any configuration change (REPLICAOF NO ONE yet not + ## acknowledged by the promoted replica). + ## + ## - The maximum time a failover in progress waits for all the replica to be + ## reconfigured as replicas of the new primary. However even after this time + ## the replicas will be reconfigured by the Sentinels anyway, but not with + ## the exact parallel-syncs progression as specified. + #sentinel['failover_timeout'] = 60000 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. To prevent database migrations from running on upgrade, run: + + ```shell + sudo touch /etc/gitlab/skip-auto-reconfigure + ``` + + Only the primary GitLab application server should handle migrations. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Sentinel nodes, and + make sure you set up the correct IPs. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Gitaly + +Deploying Gitaly in its own server can benefit GitLab installations that are +larger than a single machine. + +The Gitaly node requirements are dependent on customer data, specifically the number of +projects and their repository sizes. Two nodes are recommended as an absolute minimum. +Each Gitaly node should store no more than 5TB of data and have the number of +[`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) set to 20% of available CPUs. +Additional nodes should be considered in conjunction with a review of expected +data size and spread based on the recommendations above. + +It is also strongly recommended that all Gitaly nodes be set up with SSD disks with +a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write, +as Gitaly has heavy I/O. These IOPS values are recommended only as a starter as with +time they may be adjusted higher or lower depending on the scale of your environment's workload. +If you're running the environment on a Cloud provider, you may need to refer to +their documentation on how to configure IOPS correctly. + +Some things to note: + +- The GitLab Rails application shards repositories into [repository storages](../repository_storage_paths.md). +- A Gitaly server can host one or more storages. +- A GitLab server can use one or more Gitaly servers. +- Gitaly addresses must be specified in such a way that they resolve + correctly for ALL Gitaly clients. +- Gitaly servers must not be exposed to the public internet, as Gitaly's network + traffic is unencrypted by default. The use of a firewall is highly recommended + to restrict access to the Gitaly server. Another option is to + [use TLS](#gitaly-tls-support). + +TIP: **Tip:** +For more information about Gitaly's history and network architecture see the +[standalone Gitaly documentation](../gitaly/index.md). + +Note: **Note:** +The token referred to throughout the Gitaly documentation is +just an arbitrary password selected by the administrator. It is unrelated to +tokens created for the GitLab API or other similar web API tokens. + +Below we describe how to configure two Gitaly servers, with IPs and +domain names: + +- `10.6.0.91`: Gitaly 1 (`gitaly1.internal`) +- `10.6.0.92`: Gitaly 2 (`gitaly2.internal`) + +The secret token is assumed to be `gitalysecret` and that +your GitLab installation has three repository storages: + +- `default` on Gitaly 1 +- `storage1` on Gitaly 1 +- `storage2` on Gitaly 2 + +On each node: + +1. [Download/Install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page but + **without** providing the `EXTERNAL_URL` value. +1. Edit `/etc/gitlab/gitlab.rb` to configure storage paths, enable + the network listener and configure the token: + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + + ```ruby + # /etc/gitlab/gitlab.rb + + # Gitaly and GitLab use two shared secrets for authentication, one to authenticate gRPC requests + # to Gitaly, and a second for authentication callbacks from GitLab-Shell to the GitLab internal API. + # The following two values must be the same as their respective values + # of the GitLab Rails application setup + gitaly['auth_token'] = 'gitalysecret' + gitlab_shell['secret_token'] = 'shellsecret' + + # Avoid running unnecessary services on the Gitaly server + postgresql['enable'] = false + redis['enable'] = false + nginx['enable'] = false + puma['enable'] = false + unicorn['enable'] = false + sidekiq['enable'] = false + gitlab_workhorse['enable'] = false + grafana['enable'] = false + + # If you run a seperate monitoring node you can disable these services + alertmanager['enable'] = false + prometheus['enable'] = false + + # Prevent database connections during 'gitlab-ctl reconfigure' + gitlab_rails['rake_cache_clear'] = false + gitlab_rails['auto_migrate'] = false + + # Configure the gitlab-shell API callback URL. Without this, `git push` will + # fail. This can be your 'front door' GitLab URL or an internal load + # balancer. + # Don't forget to copy `/etc/gitlab/gitlab-secrets.json` from web server to Gitaly server. + gitlab_rails['internal_api_url'] = 'https://gitlab.example.com' + + # Make Gitaly accept connections on all network interfaces. You must use + # firewalls to restrict access to this address/port. + # Comment out following line if you only want to support TLS connections + gitaly['listen_addr'] = "0.0.0.0:8075" + ``` + +1. Append the following to `/etc/gitlab/gitlab.rb` for each respective server: + 1. On `gitaly1.internal`: + + ```ruby + git_data_dirs({ + 'default' => { + 'path' => '/var/opt/gitlab/git-data' + }, + 'storage1' => { + 'path' => '/mnt/gitlab/git-data' + }, + }) + ``` + + 1. On `gitaly2.internal`: + + ```ruby + git_data_dirs({ + 'storage2' => { + 'path' => '/mnt/gitlab/git-data' + }, + }) + ``` + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). + +### Gitaly TLS support + +Gitaly supports TLS encryption. To be able to communicate +with a Gitaly instance that listens for secure connections you will need to use `tls://` URL +scheme in the `gitaly_address` of the corresponding storage entry in the GitLab configuration. + +You will need to bring your own certificates as this isn't provided automatically. +The certificate, or its certificate authority, must be installed on all Gitaly +nodes (including the Gitaly node using the certificate) and on all client nodes +that communicate with it following the procedure described in +[GitLab custom certificate configuration](https://docs.gitlab.com/omnibus/settings/ssl.html#install-custom-public-certificates). + +NOTE: **Note:** +The self-signed certificate must specify the address you use to access the +Gitaly server. If you are addressing the Gitaly server by a hostname, you can +either use the Common Name field for this, or add it as a Subject Alternative +Name. If you are addressing the Gitaly server by its IP address, you must add it +as a Subject Alternative Name to the certificate. +[gRPC does not support using an IP address as Common Name in a certificate](https://github.com/grpc/grpc/issues/2691). + +NOTE: **Note:** +It is possible to configure Gitaly servers with both an +unencrypted listening address `listen_addr` and an encrypted listening +address `tls_listen_addr` at the same time. This allows you to do a +gradual transition from unencrypted to encrypted traffic, if necessary. + +To configure Gitaly with TLS: + +1. Create the `/etc/gitlab/ssl` directory and copy your key and certificate there: + + ```shell + sudo mkdir -p /etc/gitlab/ssl + sudo chmod 755 /etc/gitlab/ssl + sudo cp key.pem cert.pem /etc/gitlab/ssl/ + sudo chmod 644 key.pem cert.pem + ``` + +1. Copy the cert to `/etc/gitlab/trusted-certs` so Gitaly will trust the cert when + calling into itself: + + ```shell + sudo cp /etc/gitlab/ssl/cert.pem /etc/gitlab/trusted-certs/ + ``` + +1. Edit `/etc/gitlab/gitlab.rb` and add: + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + + ```ruby + gitaly['tls_listen_addr'] = "0.0.0.0:9999" + gitaly['certificate_path'] = "/etc/gitlab/ssl/cert.pem" + gitaly['key_path'] = "/etc/gitlab/ssl/key.pem" + ``` + +1. Delete `gitaly['listen_addr']` to allow only encrypted connections. + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Sidekiq + +Sidekiq requires connections to the Redis, PostgreSQL and Gitaly instances. +The following IPs will be used as an example: + +- `10.6.0.101`: Sidekiq 1 +- `10.6.0.102`: Sidekiq 2 +- `10.6.0.103`: Sidekiq 3 +- `10.6.0.104`: Sidekiq 4 + +To configure the Sidekiq nodes, on each one: + +1. SSH into the Sidekiq server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab package +you want using steps 1 and 2 from the GitLab downloads page. +**Do not complete any other steps on the download page.** +1. Open `/etc/gitlab/gitlab.rb` with your editor: + + ```ruby + ######################################## + ##### Services Disabled ### + ######################################## + + nginx['enable'] = false + grafana['enable'] = false + prometheus['enable'] = false + alertmanager['enable'] = false + gitaly['enable'] = false + gitlab_workhorse['enable'] = false + nginx['enable'] = false + puma['enable'] = false + postgres_exporter['enable'] = false + postgresql['enable'] = false + redis['enable'] = false + redis_exporter['enable'] = false + gitlab_exporter['enable'] = false + + ######################################## + #### Redis ### + ######################################## + + ## Redis connection details + ## First cluster that will host the cache + gitlab_rails['redis_cache_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER>@gitlab-redis-cache' + + gitlab_rails['redis_cache_sentinels'] = [ + {host: '10.6.0.71', port: 26379}, + {host: '10.6.0.72', port: 26379}, + {host: '10.6.0.73', port: 26379}, + ] + + ## Second cluster that will host the queues, shared state, and actioncable + gitlab_rails['redis_queues_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_shared_state_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_actioncable_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + + gitlab_rails['redis_queues_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_shared_state_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_actioncable_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + + ####################################### + ### Gitaly ### + ####################################### + + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage1' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' }, + }) + gitlab_rails['gitaly_token'] = 'YOUR_TOKEN' + + ####################################### + ### Postgres ### + ####################################### + gitlab_rails['db_host'] = '10.6.0.20' # internal load balancer IP + gitlab_rails['db_port'] = 6432 + gitlab_rails['db_password'] = '<postgresql_user_password>' + gitlab_rails['db_adapter'] = 'postgresql' + gitlab_rails['db_encoding'] = 'unicode' + gitlab_rails['auto_migrate'] = false + + ####################################### + ### Sidekiq configuration ### + ####################################### + sidekiq['listen_address'] = "0.0.0.0" + sidekiq['cluster'] = true # no need to set this after GitLab 13.0 + + ####################################### + ### Monitoring configuration ### + ####################################### + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + + # Rails Status for prometheus + gitlab_rails['monitoring_whitelist'] = ['10.6.0.121/32', '127.0.0.0/8'] + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +TIP: **Tip:** +You can also run [multiple Sidekiq processes](../operations/extra_sidekiq_processes.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure GitLab Rails + +NOTE: **Note:** +In our architectures we run each GitLab Rails node using the Puma webserver +and have its number of workers set to 90% of available CPUs along with four threads. For +nodes that are running Rails with other components the worker value should be reduced +accordingly where we've found 50% achieves a good balance but this is dependent +on workload. + +This section describes how to configure the GitLab application (Rails) component. + +The following IPs will be used as an example: + +- `10.6.0.111`: GitLab application 1 +- `10.6.0.112`: GitLab application 2 +- `10.6.0.113`: GitLab application 3 + +On each node perform the following: + +1. Download/install Omnibus GitLab using **steps 1 and 2** from + [GitLab downloads](https://about.gitlab.com/install/). Do not complete other + steps on the download page. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Edit `/etc/gitlab/gitlab.rb` and use the following configuration. + To maintain uniformity of links across nodes, the `external_url` + on the application server should point to the external URL that users will use + to access GitLab. This would be the URL of the [external load balancer](#configure-the-external-load-balancer) + which will route traffic to the GitLab application server: + + ```ruby + external_url 'https://gitlab.example.com' + + # Gitaly and GitLab use two shared secrets for authentication, one to authenticate gRPC requests + # to Gitaly, and a second for authentication callbacks from GitLab-Shell to the GitLab internal API. + # The following two values must be the same as their respective values + # of the Gitaly setup + gitlab_rails['gitaly_token'] = 'gitalysecret' + gitlab_shell['secret_token'] = 'shellsecret' + + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage1' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' }, + }) + + ## Disable components that will not be on the GitLab application server + roles ['application_role'] + gitaly['enable'] = false + nginx['enable'] = true + + ## PostgreSQL connection details + # Disable PostgreSQL on the application node + postgresql['enable'] = false + gitlab_rails['db_host'] = '10.6.0.20' # internal load balancer IP + gitlab_rails['db_port'] = 6432 + gitlab_rails['db_password'] = '<postgresql_user_password>' + gitlab_rails['auto_migrate'] = false + + ## Redis connection details + ## First cluster that will host the cache + gitlab_rails['redis_cache_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER>@gitlab-redis-cache' + + gitlab_rails['redis_cache_sentinels'] = [ + {host: '10.6.0.71', port: 26379}, + {host: '10.6.0.72', port: 26379}, + {host: '10.6.0.73', port: 26379}, + ] + + ## Second cluster that will host the queues, shared state, and actionable + gitlab_rails['redis_queues_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_shared_state_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_actioncable_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + + gitlab_rails['redis_queues_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_shared_state_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_actioncable_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + + # Set the network addresses that the exporters used for monitoring will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + gitlab_workhorse['prometheus_listen_addr'] = '0.0.0.0:9229' + sidekiq['listen_address'] = "0.0.0.0" + puma['listen'] = '0.0.0.0' + + # Add the monitoring node's IP address to the monitoring whitelist and allow it to + # scrape the NGINX metrics + gitlab_rails['monitoring_whitelist'] = ['10.6.0.121/32', '127.0.0.0/8'] + nginx['status']['options']['allow'] = ['10.6.0.121/32', '127.0.0.0/8'] + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. If you're using [Gitaly with TLS support](#gitaly-tls-support), make sure the + `git_data_dirs` entry is configured with `tls` instead of `tcp`: + + ```ruby + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' }, + 'storage1' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' }, + 'storage2' => { 'gitaly_address' => 'tls://gitaly2.internal:9999' }, + }) + ``` + + 1. Copy the cert into `/etc/gitlab/trusted-certs`: + + ```shell + sudo cp cert.pem /etc/gitlab/trusted-certs/ + ``` + +1. If you're [using NFS](#configure-nfs-optional): + 1. If necessary, install the NFS client utility packages using the following + commands: + + ```shell + # Ubuntu/Debian + apt-get install nfs-common + + # CentOS/Red Hat + yum install nfs-utils nfs-utils-lib + ``` + + 1. Specify the necessary NFS mounts in `/etc/fstab`. + The exact contents of `/etc/fstab` will depend on how you chose + to configure your NFS server. See the [NFS documentation](../high_availability/nfs.md) + for examples and the various options. + + 1. Create the shared directories. These may be different depending on your NFS + mount locations. + + ```shell + mkdir -p /var/opt/gitlab/.ssh /var/opt/gitlab/gitlab-rails/uploads /var/opt/gitlab/gitlab-rails/shared /var/opt/gitlab/gitlab-ci/builds /var/opt/gitlab/git-data + ``` + + 1. Edit `/etc/gitlab/gitlab.rb` and use the following configuration: + + ```ruby + ## Prevent GitLab from starting if NFS data mounts are not available + high_availability['mountpoint'] = '/var/opt/gitlab/git-data' + + ## Ensure UIDs and GIDs match between servers for permissions via NFS + user['uid'] = 9000 + user['gid'] = 9000 + web_server['uid'] = 9001 + web_server['gid'] = 9001 + registry['uid'] = 9002 + registry['gid'] = 9002 + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. Confirm the node can connect to Gitaly: + + ```shell + sudo gitlab-rake gitlab:gitaly:check + ``` + + Then, tail the logs to see the requests: + + ```shell + sudo gitlab-ctl tail gitaly + ``` + +1. Optionally, from the Gitaly servers, confirm that Gitaly can perform callbacks to the internal API: + + ```shell + sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml + ``` + +NOTE: **Note:** +When you specify `https` in the `external_url`, as in the example +above, GitLab assumes you have SSL certificates in `/etc/gitlab/ssl/`. If +certificates are not present, NGINX will fail to start. See the +[NGINX documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for more information. + +### GitLab Rails post-configuration + +Initialize the GitLab database, by running the following in one of the Rails nodes: + +```shell +sudo gitlab-rake gitlab:db:configure +``` + +NOTE: **Note:** +If you encounter a `rake aborted!` error stating that PgBouncer is failing to connect to +PostgreSQL it may be that your PgBouncer node's IP address is missing from +PostgreSQL's `trust_auth_cidr_addresses` in `gitlab.rb` on your database nodes. See +[PgBouncer error `ERROR: pgbouncer cannot connect to server`](troubleshooting.md#pgbouncer-error-error-pgbouncer-cannot-connect-to-server) +in the Troubleshooting section before proceeding. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Prometheus + +The Omnibus GitLab package can be used to configure a standalone Monitoring node +running [Prometheus](../monitoring/prometheus/index.md) and +[Grafana](../monitoring/performance/grafana_configuration.md). + +The following IP will be used as an example: + +- `10.6.0.121`: Prometheus + +To configure the Monitoring node: + +1. SSH into the Monitoring node. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + Do not complete any other steps on the download page. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + external_url 'http://gitlab.example.com' + + # Disable all other services + gitlab_rails['auto_migrate'] = false + alertmanager['enable'] = false + gitaly['enable'] = false + gitlab_exporter['enable'] = false + gitlab_workhorse['enable'] = false + nginx['enable'] = true + postgres_exporter['enable'] = false + postgresql['enable'] = false + redis['enable'] = false + redis_exporter['enable'] = false + sidekiq['enable'] = false + puma['enable'] = false + unicorn['enable'] = false + node_exporter['enable'] = false + gitlab_exporter['enable'] = false + + # Enable Prometheus + prometheus['enable'] = true + prometheus['listen_address'] = '0.0.0.0:9090' + prometheus['monitor_kubernetes'] = false + + # Enable Login form + grafana['disable_login_form'] = false + + # Enable Grafana + grafana['enable'] = true + grafana['admin_password'] = '<grafana_password>' + + # Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. In the GitLab UI, set `admin/application_settings/metrics_and_profiling` > Metrics - Grafana to `/-/grafana` to +`http[s]://<MONITOR NODE>/-/grafana` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure the object storage + +GitLab supports using an object storage service for holding numerous types of data. +It's recommended over [NFS](#configure-nfs-optional) and in general it's better +in larger setups as object storage is typically much more performant, reliable, +and scalable. + +Object storage options that GitLab has tested, or is aware of customers using include: + +- SaaS/Cloud solutions such as [Amazon S3](https://aws.amazon.com/s3/), [Google cloud storage](https://cloud.google.com/storage). +- On-premises hardware and appliances from various storage vendors. +- MinIO. There is [a guide to deploying this](https://docs.gitlab.com/charts/advanced/external-object-storage/minio.html) within our Helm Chart documentation. + +For configuring GitLab to use Object Storage refer to the following guides +based on what features you intend to use: + +1. Configure [object storage for backups](../../raketasks/backup_restore.md#uploading-backups-to-a-remote-cloud-storage). +1. Configure [object storage for job artifacts](../job_artifacts.md#using-object-storage) + including [incremental logging](../job_logs.md#new-incremental-logging-architecture). +1. Configure [object storage for LFS objects](../lfs/index.md#storing-lfs-objects-in-remote-object-storage). +1. Configure [object storage for uploads](../uploads.md#using-object-storage-core-only). +1. Configure [object storage for merge request diffs](../merge_request_diffs.md#using-object-storage). +1. Configure [object storage for Container Registry](../packages/container_registry.md#use-object-storage) (optional feature). +1. Configure [object storage for Mattermost](https://docs.mattermost.com/administration/config-settings.html#file-storage) (optional feature). +1. Configure [object storage for packages](../packages/index.md#using-object-storage) (optional feature). **(PREMIUM ONLY)** +1. Configure [object storage for Dependency Proxy](../packages/dependency_proxy.md#using-object-storage) (optional feature). **(PREMIUM ONLY)** +1. Configure [object storage for Pseudonymizer](../pseudonymizer.md#configuration) (optional feature). **(ULTIMATE ONLY)** +1. Configure [object storage for autoscale Runner caching](https://docs.gitlab.com/runner/configuration/autoscale.html#distributed-runners-caching) (optional - for improved performance). +1. Configure [object storage for Terraform state files](../terraform_state.md#using-object-storage-core-only). + +Using separate buckets for each data type is the recommended approach for GitLab. + +A limitation of our configuration is that each use of object storage is separately configured. +[We have an issue for improving this](https://gitlab.com/gitlab-org/gitlab/-/issues/23345) +and easily using one bucket with separate folders is one improvement that this might bring. + +There is at least one specific issue with using the same bucket: +when GitLab is deployed with the Helm chart restore from backup +[will not properly function](https://docs.gitlab.com/charts/advanced/external-object-storage/#lfs-artifacts-uploads-packages-external-diffs-pseudonymizer) +unless separate buckets are used. + +One risk of using a single bucket would be if your organization decided to +migrate GitLab to the Helm deployment in the future. GitLab would run, but the situation with +backups might not be realized until the organization had a critical requirement for the backups to +work. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure NFS (optional) + +[Object storage](#configure-the-object-storage), along with [Gitaly](#configure-gitaly) +are recommended over NFS wherever possible for improved performance. If you intend +to use GitLab Pages, this currently [requires NFS](troubleshooting.md#gitlab-pages-requires-nfs). + +See how to [configure NFS](../high_availability/nfs.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Troubleshooting + +See the [troubleshooting documentation](troubleshooting.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> diff --git a/doc/administration/reference_architectures/1k_users.md b/doc/administration/reference_architectures/1k_users.md index def23619a5c..d3cf5f49413 100644 --- a/doc/administration/reference_architectures/1k_users.md +++ b/doc/administration/reference_architectures/1k_users.md @@ -1,86 +1,49 @@ -# Reference architecture: up to 1,000 users +--- +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers +--- -This page describes GitLab reference architecture for up to 1,000 users. -For a full list of reference architectures, see -[Available reference architectures](index.md#available-reference-architectures). - -> - **Supported users (approximate):** 1,000 -> - **High Availability:** False +# Reference architecture: up to 1,000 users **(CORE ONLY)** -| Users | Configuration([8](#footnotes)) | GCP | AWS | Azure | -|-------|------------------------------------|----------------|---------------------|------------------------| -| 500 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | F4s v2 | -| 1000 | 8 vCPU, 7.2GB Memory | `n1-highcpu-8` | `c5.2xlarge` | F8s v2 | +This page describes GitLab reference architecture for up to 1,000 users. For a +full list of reference architectures, see +[Available reference architectures](index.md#available-reference-architectures). -In addition to the above, we recommend having at least -2GB of swap on your server, even if you currently have -enough available RAM. Having swap will help reduce the chance of errors occurring -if your available memory changes. We also recommend -configuring the kernel's swappiness setting -to a low value like `10` to make the most of your RAM while still having the swap -available when needed. +If you need to serve up to 1,000 users and you don't have strict availability +requirements, a single-node solution with +[frequent backups](index.md#automated-backups-core-only) is appropriate for +many organizations . -For situations where you need to serve up to 1,000 users, a single-node -solution with [frequent backups](index.md#automated-backups-core-only) is appropriate -for many organizations. With automatic backup of the GitLab repositories, -configuration, and the database, if you don't have strict availability -requirements, this is the ideal solution. +> - **Supported users (approximate):** 1,000 +> - **High Availability:** No + +| Users | Configuration | GCP | AWS | Azure | +|--------------|-------------------------|----------------|-----------------|----------------| +| Up to 500 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | +| Up to 1,000 | 8 vCPU, 7.2GB memory | n1-highcpu-8 | c5.2xlarge | F8s v2 | + +The Google Cloud Platform (GCP) architectures were built and tested using the +[Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) +CPU platform. On different hardware you may find that adjustments, either lower +or higher, are required for your CPU or node counts. For more information, see +our [Sysbench](https://github.com/akopytov/sysbench)-based +[CPU benchmark](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). + +In addition to the stated configurations, we recommend having at least 2GB of +swap on your server, even if you currently have enough available memory. Having +swap will help reduce the chance of errors occurring if your available memory +changes. We also recommend configuring the kernel's swappiness setting to a +lower value (such as `10`) to make the most of your memory, while still having +the swap available when needed. ## Setup instructions -- For this default reference architecture, use the standard [installation instructions](../../install/README.md) to install GitLab. +For this default reference architecture, to install GitLab use the standard +[installation instructions](../../install/README.md). NOTE: **Note:** You can also optionally configure GitLab to use an [external PostgreSQL service](../postgresql/external.md) or an [external object storage service](../high_availability/object_storage.md) for added performance and reliability at a reduced complexity cost. - -## Footnotes - -1. In our architectures we run each GitLab Rails node using the Puma webserver - and have its number of workers set to 90% of available CPUs along with four threads. For - nodes that are running Rails with other components the worker value should be reduced - accordingly where we've found 50% achieves a good balance but this is dependent - on workload. - -1. Gitaly node requirements are dependent on customer data, specifically the number of - projects and their sizes. We recommend two nodes as an absolute minimum for HA environments - and at least four nodes should be used when supporting 50,000 or more users. - We also recommend that each Gitaly node should store no more than 5TB of data - and have the number of [`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) - set to 20% of available CPUs. Additional nodes should be considered in conjunction - with a review of expected data size and spread based on the recommendations above. - -1. Recommended Redis setup differs depending on the size of the architecture. - For smaller architectures (less than 3,000 users) a single instance should suffice. - For medium sized installs (3,000 - 5,000) we suggest one Redis cluster for all - classes and that Redis Sentinel is hosted alongside Consul. - For larger architectures (10,000 users or more) we suggest running a separate - [Redis Cluster](../redis/replication_and_failover.md#running-multiple-redis-clusters) for the Cache class - and another for the Queues and Shared State classes respectively. We also recommend - that you run the Redis Sentinel clusters separately for each Redis Cluster. - -1. For data objects such as LFS, Uploads, Artifacts, etc. We recommend an [Object Storage service](../object_storage.md) - over NFS where possible, due to better performance and availability. - -1. NFS can be used as an alternative for both repository data (replacing Gitaly) and - object storage but this isn't typically recommended for performance reasons. Note however it is required for - [GitLab Pages](https://gitlab.com/gitlab-org/gitlab-pages/-/issues/196). - -1. Our architectures have been tested and validated with [HAProxy](https://www.haproxy.org/) - as the load balancer. Although other load balancers with similar feature sets - could also be used, those load balancers have not been validated. - -1. We strongly recommend that any Gitaly or NFS nodes be set up with SSD disks over - HDD with a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write - as these components have heavy I/O. These IOPS values are recommended only as a starter - as with time they may be adjusted higher or lower depending on the scale of your - environment's workload. If you're running the environment on a Cloud provider - you may need to refer to their documentation on how configure IOPS correctly. - -1. The architectures were built and tested with the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) - CPU platform on GCP. On different hardware you may find that adjustments, either lower - or higher, are required for your CPU or Node counts accordingly. For more information, a - [Sysbench](https://github.com/akopytov/sysbench) benchmark of the CPU can be found - [here](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). diff --git a/doc/administration/reference_architectures/25k_users.md b/doc/administration/reference_architectures/25k_users.md index 17f4300eb03..1cfa2565893 100644 --- a/doc/administration/reference_architectures/25k_users.md +++ b/doc/administration/reference_architectures/25k_users.md @@ -1,76 +1,2047 @@ -# Reference architecture: up to 25,000 users +--- +reading_time: true +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers +--- -This page describes GitLab reference architecture for up to 25,000 users. -For a full list of reference architectures, see +# Reference architecture: up to 25,000 users **(PREMIUM ONLY)** + +This page describes GitLab reference architecture for up to 25,000 users. For a +full list of reference architectures, see [Available reference architectures](index.md#available-reference-architectures). > - **Supported users (approximate):** 25,000 -> - **High Availability:** True -> - **Test RPS rates:** API: 500 RPS, Web: 50 RPS, Git: 50 RPS - -| Service | Nodes | Configuration ([8](#footnotes)) | GCP | AWS | Azure | -|--------------------------------------------------------------|-------|---------------------------------|------------------|-----------------------|----------------| -| GitLab Rails ([1](#footnotes)) | 5 | 32 vCPU, 28.8GB Memory | `n1-highcpu-32` | `c5.9xlarge` | F32s v2 | -| PostgreSQL | 3 | 8 vCPU, 30GB Memory | `n1-standard-8` | `m5.2xlarge` | D8s v3 | -| PgBouncer | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | F2s v2 | -| Gitaly ([2](#footnotes)) ([5](#footnotes)) ([7](#footnotes)) | X | 32 vCPU, 120GB Memory | `n1-standard-32` | `m5.8xlarge` | D32s v3 | -| Redis ([3](#footnotes)) - Cache | 3 | 4 vCPU, 15GB Memory | `n1-standard-4` | `m5.xlarge` | D4s v3 | -| Redis ([3](#footnotes)) - Queues / Shared State | 3 | 4 vCPU, 15GB Memory | `n1-standard-4` | `m5.xlarge` | D4s v3 | -| Redis Sentinel ([3](#footnotes)) - Cache | 3 | 1 vCPU, 1.7GB Memory | `g1-small` | `t2.small` | B1MS | -| Redis Sentinel ([3](#footnotes)) - Queues / Shared State | 3 | 1 vCPU, 1.7GB Memory | `g1-small` | `t2.small` | B1MS | -| Consul | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | F2s v2 | -| Sidekiq | 4 | 4 vCPU, 15GB Memory | `n1-standard-4` | `m5.xlarge` | D4s v3 | -| Object Storage ([4](#footnotes)) | - | - | - | - | - | -| NFS Server ([5](#footnotes)) ([7](#footnotes)) | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | F4s v2 | -| Monitoring node | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | F4s v2 | -| External load balancing node ([6](#footnotes)) | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | F4s v2 | -| Internal load balancing node ([6](#footnotes)) | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | F4s v2 | - -## Footnotes - -1. In our architectures we run each GitLab Rails node using the Puma webserver - and have its number of workers set to 90% of available CPUs along with four threads. For - nodes that are running Rails with other components the worker value should be reduced - accordingly where we've found 50% achieves a good balance but this is dependent - on workload. - -1. Gitaly node requirements are dependent on customer data, specifically the number of - projects and their sizes. We recommend two nodes as an absolute minimum for HA environments - and at least four nodes should be used when supporting 50,000 or more users. - We also recommend that each Gitaly node should store no more than 5TB of data - and have the number of [`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) - set to 20% of available CPUs. Additional nodes should be considered in conjunction - with a review of expected data size and spread based on the recommendations above. - -1. Recommended Redis setup differs depending on the size of the architecture. - For smaller architectures (less than 3,000 users) a single instance should suffice. - For medium sized installs (3,000 - 5,000) we suggest one Redis cluster for all - classes and that Redis Sentinel is hosted alongside Consul. - For larger architectures (10,000 users or more) we suggest running a separate - [Redis Cluster](../redis/replication_and_failover.md#running-multiple-redis-clusters) for the Cache class - and another for the Queues and Shared State classes respectively. We also recommend - that you run the Redis Sentinel clusters separately for each Redis Cluster. - -1. For data objects such as LFS, Uploads, Artifacts, etc. We recommend an [Object Storage service](../object_storage.md) - over NFS where possible, due to better performance and availability. - -1. NFS can be used as an alternative for both repository data (replacing Gitaly) and - object storage but this isn't typically recommended for performance reasons. Note however it is required for - [GitLab Pages](https://gitlab.com/gitlab-org/gitlab-pages/-/issues/196). - -1. Our architectures have been tested and validated with [HAProxy](https://www.haproxy.org/) - as the load balancer. Although other load balancers with similar feature sets - could also be used, those load balancers have not been validated. - -1. We strongly recommend that any Gitaly or NFS nodes be set up with SSD disks over - HDD with a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write - as these components have heavy I/O. These IOPS values are recommended only as a starter - as with time they may be adjusted higher or lower depending on the scale of your - environment's workload. If you're running the environment on a Cloud provider - you may need to refer to their documentation on how configure IOPS correctly. - -1. The architectures were built and tested with the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) - CPU platform on GCP. On different hardware you may find that adjustments, either lower - or higher, are required for your CPU or Node counts accordingly. For more information, a - [Sysbench](https://github.com/akopytov/sysbench) benchmark of the CPU can be found - [here](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). +> - **High Availability:** Yes +> - **Test requests per second (RPS) rates:** API: 500 RPS, Web: 50 RPS, Git: 50 RPS + +| Service | Nodes | Configuration | GCP | AWS | Azure | +|-----------------------------------------|-------------|-------------------------|-----------------|-------------|----------| +| External load balancing node | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | +| Consul | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| PostgreSQL | 3 | 8 vCPU, 30GB memory | n1-standard-8 | m5.2xlarge | D8s v3 | +| PgBouncer | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Internal load balancing node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Redis - Cache | 3 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| Redis - Queues / Shared State | 3 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| Redis Sentinel - Cache | 3 | 1 vCPU, 1.7GB memory | g1-small | t2.small | B1MS | +| Redis Sentinel - Queues / Shared State | 3 | 1 vCPU, 1.7GB memory | g1-small | t2.small | B1MS | +| Gitaly | 2 (minimum) | 32 vCPU, 120GB memory | n1-standard-32 | m5.8xlarge | D32s v3 | +| Sidekiq | 4 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| GitLab Rails | 5 | 32 vCPU, 28.8GB memory | n1-highcpu-32 | c5.9xlarge | F32s v2 | +| Monitoring node | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | +| Object Storage | n/a | n/a | n/a | n/a | n/a | +| NFS Server | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | + +The Google Cloud Platform (GCP) architectures were built and tested using the +[Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) +CPU platform. On different hardware you may find that adjustments, either lower +or higher, are required for your CPU or node counts. For more information, see +our [Sysbench](https://github.com/akopytov/sysbench)-based +[CPU benchmark](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). + +For data objects (such as LFS, Uploads, or Artifacts), an +[object storage service](#configure-the-object-storage) is recommended instead +of NFS where possible, due to better performance and availability. Since this +doesn't require a node to be set up, *Object Storage* is noted as not +applicable (n/a) in the previous table. + +## Setup components + +To set up GitLab and its components to accommodate up to 25,000 users: + +1. [Configure the external load balancing node](#configure-the-external-load-balancer) + that will handle the load balancing of the three GitLab application services nodes. +1. [Configure Consul](#configure-consul). +1. [Configure PostgreSQL](#configure-postgresql), the database for GitLab. +1. [Configure PgBouncer](#configure-pgbouncer). +1. [Configure the internal load balancing node](#configure-the-internal-load-balancer) +1. [Configure Redis](#configure-redis). +1. [Configure Gitaly](#configure-gitaly), + which provides access to the Git repositories. +1. [Configure Sidekiq](#configure-sidekiq). +1. [Configure the main GitLab Rails application](#configure-gitlab-rails) + to run Puma/Unicorn, Workhorse, GitLab Shell, and to serve all frontend requests (UI, API, Git + over HTTP/SSH). +1. [Configure Prometheus](#configure-prometheus) to monitor your GitLab environment. +1. [Configure the Object Storage](#configure-the-object-storage) + used for shared data objects. +1. [Configure NFS (Optional)](#configure-nfs-optional) + to have shared disk storage service as an alternative to Gitaly and/or Object Storage (although + not recommended). NFS is required for GitLab Pages, you can skip this step if you're not using + that feature. + +We start with all servers on the same 10.6.0.0/24 private network range, they +can connect to each other freely on those addresses. + +Here is a list and description of each machine and the assigned IP: + +- `10.6.0.10`: External Load Balancer +- `10.6.0.11`: Consul 1 +- `10.6.0.12`: Consul 2 +- `10.6.0.13`: Consul 3 +- `10.6.0.21`: PostgreSQL primary +- `10.6.0.22`: PostgreSQL secondary 1 +- `10.6.0.23`: PostgreSQL secondary 2 +- `10.6.0.31`: PgBouncer 1 +- `10.6.0.32`: PgBouncer 2 +- `10.6.0.33`: PgBouncer 3 +- `10.6.0.40`: Internal Load Balancer +- `10.6.0.51`: Redis - Cache Primary +- `10.6.0.52`: Redis - Cache Replica 1 +- `10.6.0.53`: Redis - Cache Replica 2 +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 +- `10.6.0.61`: Redis - Queues Primary +- `10.6.0.62`: Redis - Queues Replica 1 +- `10.6.0.63`: Redis - Queues Replica 2 +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 +- `10.6.0.91`: Gitaly 1 +- `10.6.0.92`: Gitaly 2 +- `10.6.0.101`: Sidekiq 1 +- `10.6.0.102`: Sidekiq 2 +- `10.6.0.103`: Sidekiq 3 +- `10.6.0.104`: Sidekiq 4 +- `10.6.0.111`: GitLab application 1 +- `10.6.0.112`: GitLab application 2 +- `10.6.0.113`: GitLab application 3 +- `10.6.0.121`: Prometheus + +## Configure the external load balancer + +NOTE: **Note:** +This architecture has been tested and validated with [HAProxy](https://www.haproxy.org/) +as the load balancer. Although other load balancers with similar feature sets +could also be used, those load balancers have not been validated. + +In an active/active GitLab configuration, you will need a load balancer to route +traffic to the application servers. The specifics on which load balancer to use +or the exact configuration is beyond the scope of GitLab documentation. We hope +that if you're managing multi-node systems like GitLab you have a load balancer of +choice already. Some examples including HAProxy (open-source), F5 Big-IP LTM, +and Citrix Net Scaler. This documentation will outline what ports and protocols +you need to use with GitLab. + +The next question is how you will handle SSL in your environment. +There are several different options: + +- [The application node terminates SSL](#application-node-terminates-ssl). +- [The load balancer terminates SSL without backend SSL](#load-balancer-terminates-ssl-without-backend-ssl) + and communication is not secure between the load balancer and the application node. +- [The load balancer terminates SSL with backend SSL](#load-balancer-terminates-ssl-with-backend-ssl) + and communication is *secure* between the load balancer and the application node. + +### Application node terminates SSL + +Configure your load balancer to pass connections on port 443 as `TCP` rather +than `HTTP(S)` protocol. This will pass the connection to the application node's +NGINX service untouched. NGINX will have the SSL certificate and listen on port 443. + +See the [NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for details on managing SSL certificates and configuring NGINX. + +### Load balancer terminates SSL without backend SSL + +Configure your load balancer to use the `HTTP(S)` protocol rather than `TCP`. +The load balancer will then be responsible for managing SSL certificates and +terminating SSL. + +Since communication between the load balancer and GitLab will not be secure, +there is some additional configuration needed. See the +[NGINX proxied SSL documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#supporting-proxied-ssl) +for details. + +### Load balancer terminates SSL with backend SSL + +Configure your load balancer(s) to use the 'HTTP(S)' protocol rather than 'TCP'. +The load balancer(s) will be responsible for managing SSL certificates that +end users will see. + +Traffic will also be secure between the load balancer(s) and NGINX in this +scenario. There is no need to add configuration for proxied SSL since the +connection will be secure all the way. However, configuration will need to be +added to GitLab to configure SSL certificates. See +[NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for details on managing SSL certificates and configuring NGINX. + +### Ports + +The basic ports to be used are shown in the table below. + +| LB Port | Backend Port | Protocol | +| ------- | ------------ | ------------------------ | +| 80 | 80 | HTTP (*1*) | +| 443 | 443 | TCP or HTTPS (*1*) (*2*) | +| 22 | 22 | TCP | + +- (*1*): [Web terminal](../../ci/environments/index.md#web-terminals) support requires + your load balancer to correctly handle WebSocket connections. When using + HTTP or HTTPS proxying, this means your load balancer must be configured + to pass through the `Connection` and `Upgrade` hop-by-hop headers. See the + [web terminal](../integration/terminal.md) integration guide for + more details. +- (*2*): When using HTTPS protocol for port 443, you will need to add an SSL + certificate to the load balancers. If you wish to terminate SSL at the + GitLab application server instead, use TCP protocol. + +If you're using GitLab Pages with custom domain support you will need some +additional port configurations. +GitLab Pages requires a separate virtual IP address. Configure DNS to point the +`pages_external_url` from `/etc/gitlab/gitlab.rb` at the new virtual IP address. See the +[GitLab Pages documentation](../pages/index.md) for more information. + +| LB Port | Backend Port | Protocol | +| ------- | ------------- | --------- | +| 80 | Varies (*1*) | HTTP | +| 443 | Varies (*1*) | TCP (*2*) | + +- (*1*): The backend port for GitLab Pages depends on the + `gitlab_pages['external_http']` and `gitlab_pages['external_https']` + setting. See [GitLab Pages documentation](../pages/index.md) for more details. +- (*2*): Port 443 for GitLab Pages should always use the TCP protocol. Users can + configure custom domains with custom SSL, which would not be possible + if SSL was terminated at the load balancer. + +#### Alternate SSH Port + +Some organizations have policies against opening SSH port 22. In this case, +it may be helpful to configure an alternate SSH hostname that allows users +to use SSH on port 443. An alternate SSH hostname will require a new virtual IP address +compared to the other GitLab HTTP configuration above. + +Configure DNS for an alternate SSH hostname such as `altssh.gitlab.example.com`. + +| LB Port | Backend Port | Protocol | +| ------- | ------------ | -------- | +| 443 | 22 | TCP | + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Consul + +The following IPs will be used as an example: + +- `10.6.0.11`: Consul 1 +- `10.6.0.12`: Consul 2 +- `10.6.0.13`: Consul 3 + +NOTE: **Note:** +The configuration processes for the other servers in your reference architecture will +use the `/etc/gitlab/gitlab-secrets.json` file from your Consul server to connect +with the other servers. + +To configure Consul: + +1. SSH into the server that will host Consul. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['consul_role'] + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + server: true, + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Consul nodes, and + make sure you set up the correct IPs. + +NOTE: **Note:** +A Consul leader will be elected when the provisioning of the third Consul server is completed. +Viewing the Consul logs `sudo gitlab-ctl tail consul` will display +`...[INFO] consul: New leader elected: ...` + +You can list the current Consul members (server, client): + +```shell +sudo /opt/gitlab/embedded/bin/consul members +``` + +You can verify the GitLab services are running: + +```shell +sudo gitlab-ctl status +``` + +The output should be similar to the following: + +```plaintext +run: consul: (pid 30074) 76834s; run: log: (pid 29740) 76844s +run: logrotate: (pid 30925) 3041s; run: log: (pid 29649) 76861s +run: node-exporter: (pid 30093) 76833s; run: log: (pid 29663) 76855s +``` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure PostgreSQL + +In this section, you'll be guided through configuring an external PostgreSQL database +to be used with GitLab. + +### Provide your own PostgreSQL instance + +If you're hosting GitLab on a cloud provider, you can optionally use a +managed service for PostgreSQL. For example, AWS offers a managed Relational +Database Service (RDS) that runs PostgreSQL. + +If you use a cloud-managed service, or provide your own PostgreSQL: + +1. Set up PostgreSQL according to the + [database requirements document](../../install/requirements.md#database). +1. Set up a `gitlab` username with a password of your choice. The `gitlab` user + needs privileges to create the `gitlabhq_production` database. +1. Configure the GitLab application servers with the appropriate details. + This step is covered in [Configuring the GitLab Rails application](#configure-gitlab-rails). + +### Standalone PostgreSQL using Omnibus GitLab + +The following IPs will be used as an example: + +- `10.6.0.21`: PostgreSQL primary +- `10.6.0.22`: PostgreSQL secondary 1 +- `10.6.0.23`: PostgreSQL secondary 2 + +First, make sure to [install](https://about.gitlab.com/install/) +the Linux GitLab package **on each node**. Following the steps, +install the necessary dependencies from step 1, and add the +GitLab package repository from step 2. When installing GitLab +in the second step, do not supply the `EXTERNAL_URL` value. + +#### PostgreSQL primary node + +1. SSH into the PostgreSQL primary node. +1. Generate a password hash for the PostgreSQL username/password pair. This assumes you will use the default + username of `gitlab` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<postgresql_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 gitlab + ``` + +1. Generate a password hash for the PgBouncer username/password pair. This assumes you will use the default + username of `pgbouncer` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<pgbouncer_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 pgbouncer + ``` + +1. Generate a password hash for the Consul database username/password pair. This assumes you will use the default + username of `gitlab-consul` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<consul_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 gitlab-consul + ``` + +1. On the primary database node, edit `/etc/gitlab/gitlab.rb` replacing values noted in the `# START user configuration` section: + + ```ruby + # Disable all components except PostgreSQL and Repmgr and Consul + roles ['postgres_role'] + + # PostgreSQL configuration + postgresql['listen_address'] = '0.0.0.0' + postgresql['hot_standby'] = 'on' + postgresql['wal_level'] = 'replica' + postgresql['shared_preload_libraries'] = 'repmgr_funcs' + + # Disable automatic database migrations + gitlab_rails['auto_migrate'] = false + + # Configure the Consul agent + consul['services'] = %w(postgresql) + + # START user configuration + # Please set the real values as explained in Required Information section + # + # Replace PGBOUNCER_PASSWORD_HASH with a generated md5 value + postgresql['pgbouncer_user_password'] = '<pgbouncer_password_hash>' + # Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value + postgresql['sql_user_password'] = '<postgresql_password_hash>' + # Set `max_wal_senders` to one more than the number of database nodes in the cluster. + # This is used to prevent replication from using up all of the + # available database connections. + postgresql['max_wal_senders'] = 4 + postgresql['max_replication_slots'] = 4 + + # Replace XXX.XXX.XXX.XXX/YY with Network Address + postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24) + repmgr['trust_auth_cidr_addresses'] = %w(127.0.0.1/32 10.6.0.0/24) + + ## Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on for monitoring + node_exporter['listen_address'] = '0.0.0.0:9100' + postgres_exporter['listen_address'] = '0.0.0.0:9187' + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + # + # END user configuration + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### PostgreSQL secondary nodes + +1. On both the secondary nodes, add the same configuration specified above for the primary node + with an additional setting (`repmgr['master_on_initialization'] = false`) that will inform `gitlab-ctl` that they are standby nodes initially + and there's no need to attempt to register them as a primary node: + + ```ruby + # Disable all components except PostgreSQL and Repmgr and Consul + roles ['postgres_role'] + + # PostgreSQL configuration + postgresql['listen_address'] = '0.0.0.0' + postgresql['hot_standby'] = 'on' + postgresql['wal_level'] = 'replica' + postgresql['shared_preload_libraries'] = 'repmgr_funcs' + + # Disable automatic database migrations + gitlab_rails['auto_migrate'] = false + + # Configure the Consul agent + consul['services'] = %w(postgresql) + + # Specify if a node should attempt to be primary on initialization. + repmgr['master_on_initialization'] = false + + # Replace PGBOUNCER_PASSWORD_HASH with a generated md5 value + postgresql['pgbouncer_user_password'] = '<pgbouncer_password_hash>' + # Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value + postgresql['sql_user_password'] = '<postgresql_password_hash>' + # Set `max_wal_senders` to one more than the number of database nodes in the cluster. + # This is used to prevent replication from using up all of the + # available database connections. + postgresql['max_wal_senders'] = 4 + postgresql['max_replication_slots'] = 4 + + # Replace with your network addresses + postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24) + repmgr['trust_auth_cidr_addresses'] = %w(127.0.0.1/32 10.6.0.0/24) + + ## Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on for monitoring + node_exporter['listen_address'] = '0.0.0.0:9100' + postgres_exporter['listen_address'] = '0.0.0.0:9187' + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/database.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### PostgreSQL post-configuration + +SSH into the **primary node**: + +1. Open a database prompt: + + ```shell + gitlab-psql -d gitlabhq_production + ``` + +1. Make sure the `pg_trgm` extension is enabled (it might already be): + + ```shell + CREATE EXTENSION pg_trgm; + ``` + +1. Exit the database prompt by typing `\q` and Enter. + +1. Verify the cluster is initialized with one node: + + ```shell + gitlab-ctl repmgr cluster show + ``` + + The output should be similar to the following: + + ```plaintext + Role | Name | Upstream | Connection String + ----------+----------|----------|---------------------------------------- + * master | HOSTNAME | | host=HOSTNAME user=gitlab_repmgr dbname=gitlab_repmgr + ``` + +1. Note down the hostname or IP address in the connection string: `host=HOSTNAME`. We will + refer to the hostname in the next section as `<primary_node_name>`. If the value + is not an IP address, it will need to be a resolvable name (via DNS or + `/etc/hosts`) + +SSH into the **secondary node**: + +1. Set up the repmgr standby: + + ```shell + gitlab-ctl repmgr standby setup <primary_node_name> + ``` + + Do note that this will remove the existing data on the node. The command + has a wait time. + + The output should be similar to the following: + + ```console + Doing this will delete the entire contents of /var/opt/gitlab/postgresql/data + If this is not what you want, hit Ctrl-C now to exit + To skip waiting, rerun with the -w option + Sleeping for 30 seconds + Stopping the database + Removing the data + Cloning the data + Starting the database + Registering the node with the cluster + ok: run: repmgrd: (pid 19068) 0s + ``` + +Before moving on, make sure the databases are configured correctly. Run the +following command on the **primary** node to verify that replication is working +properly and the secondary nodes appear in the cluster: + +```shell +gitlab-ctl repmgr cluster show +``` + +The output should be similar to the following: + +```plaintext +Role | Name | Upstream | Connection String +----------+---------|-----------|------------------------------------------------ +* master | MASTER | | host=<primary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr + standby | STANDBY | MASTER | host=<secondary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr + standby | STANDBY | MASTER | host=<secondary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr +``` + +If the 'Role' column for any node says "FAILED", check the +[Troubleshooting section](troubleshooting.md) before proceeding. + +Also, check that the `repmgr-check-master` command works successfully on each node: + +```shell +su - gitlab-consul +gitlab-ctl repmgr-check-master || echo 'This node is a standby repmgr node' +``` + +This command relies on exit codes to tell Consul whether a particular node is a master +or secondary. The most important thing here is that this command does not produce errors. +If there are errors it's most likely due to incorrect `gitlab-consul` database user permissions. +Check the [Troubleshooting section](troubleshooting.md) before proceeding. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure PgBouncer + +Now that the PostgreSQL servers are all set up, let's configure PgBouncer. +The following IPs will be used as an example: + +- `10.6.0.31`: PgBouncer 1 +- `10.6.0.32`: PgBouncer 2 +- `10.6.0.33`: PgBouncer 3 + +1. On each PgBouncer node, edit `/etc/gitlab/gitlab.rb`, and replace + `<consul_password_hash>` and `<pgbouncer_password_hash>` with the + password hashes you [set up previously](#postgresql-primary-node): + + ```ruby + # Disable all components except Pgbouncer and Consul agent + roles ['pgbouncer_role'] + + # Configure PgBouncer + pgbouncer['admin_users'] = %w(pgbouncer gitlab-consul) + + pgbouncer['users'] = { + 'gitlab-consul': { + password: '<consul_password_hash>' + }, + 'pgbouncer': { + password: '<pgbouncer_password_hash>' + } + } + + # Configure Consul agent + consul['watchers'] = %w(postgresql) + consul['enable'] = true + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + + # Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + + NOTE: **Note:** + If an error `execute[generate databases.ini]` occurs, this is due to an existing + [known issue](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/4713). + It will be resolved when you run a second `reconfigure` after the next step. + +1. Create a `.pgpass` file so Consul is able to + reload PgBouncer. Enter the PgBouncer password twice when asked: + + ```shell + gitlab-ctl write-pgpass --host 127.0.0.1 --database pgbouncer --user pgbouncer --hostuser gitlab-consul + ``` + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) once again + to resolve any potential errors from the previous steps. +1. Ensure each node is talking to the current primary: + + ```shell + gitlab-ctl pgb-console # You will be prompted for PGBOUNCER_PASSWORD + ``` + +1. Once the console prompt is available, run the following queries: + + ```shell + show databases ; show clients ; + ``` + + The output should be similar to the following: + + ```plaintext + name | host | port | database | force_user | pool_size | reserve_pool | pool_mode | max_connections | current_connections + ---------------------+-------------+------+---------------------+------------+-----------+--------------+-----------+-----------------+--------------------- + gitlabhq_production | MASTER_HOST | 5432 | gitlabhq_production | | 20 | 0 | | 0 | 0 + pgbouncer | | 6432 | pgbouncer | pgbouncer | 2 | 0 | statement | 0 | 0 + (2 rows) + + type | user | database | state | addr | port | local_addr | local_port | connect_time | request_time | ptr | link | remote_pid | tls + ------+-----------+---------------------+---------+----------------+-------+------------+------------+---------------------+---------------------+-----------+------+------------+----- + C | pgbouncer | pgbouncer | active | 127.0.0.1 | 56846 | 127.0.0.1 | 6432 | 2017-08-21 18:09:59 | 2017-08-21 18:10:48 | 0x22b3880 | | 0 | + (2 rows) + ``` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +### Configure the internal load balancer + +If you're running more than one PgBouncer node as recommended, then at this time you'll need to set +up a TCP internal load balancer to serve each correctly. + +The following IP will be used as an example: + +- `10.6.0.40`: Internal Load Balancer + +Here's how you could do it with [HAProxy](https://www.haproxy.org/): + +```plaintext +global + log /dev/log local0 + log localhost local1 notice + log stdout format raw local0 + +defaults + log global + default-server inter 10s fall 3 rise 2 + balance leastconn + +frontend internal-pgbouncer-tcp-in + bind *:6432 + mode tcp + option tcplog + + default_backend pgbouncer + +backend pgbouncer + mode tcp + option tcp-check + + server pgbouncer1 10.6.0.21:6432 check + server pgbouncer2 10.6.0.22:6432 check + server pgbouncer3 10.6.0.23:6432 check +``` + +Refer to your preferred Load Balancer's documentation for further guidance. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Redis + +Using [Redis](https://redis.io/) in scalable environment is possible using a **Primary** x **Replica** +topology with a [Redis Sentinel](https://redis.io/topics/sentinel) service to watch and automatically +start the failover procedure. + +Redis requires authentication if used with Sentinel. See +[Redis Security](https://redis.io/topics/security) documentation for more +information. We recommend using a combination of a Redis password and tight +firewall rules to secure your Redis service. +You are highly encouraged to read the [Redis Sentinel](https://redis.io/topics/sentinel) documentation +before configuring Redis with GitLab to fully understand the topology and +architecture. + +The requirements for a Redis setup are the following: + +1. All Redis nodes must be able to talk to each other and accept incoming + connections over Redis (`6379`) and Sentinel (`26379`) ports (unless you + change the default ones). +1. The server that hosts the GitLab application must be able to access the + Redis nodes. +1. Protect the nodes from access from external networks + ([Internet](https://gitlab.com/gitlab-org/gitlab-foss/uploads/c4cc8cd353604bd80315f9384035ff9e/The_Internet_IT_Crowd.png)), + using a firewall. + +In this section, you'll be guided through configuring two external Redis clusters +to be used with GitLab. The following IPs will be used as an example: + +- `10.6.0.51`: Redis - Cache Primary +- `10.6.0.52`: Redis - Cache Replica 1 +- `10.6.0.53`: Redis - Cache Replica 2 +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 +- `10.6.0.61`: Redis - Queues Primary +- `10.6.0.62`: Redis - Queues Replica 1 +- `10.6.0.63`: Redis - Queues Replica 2 +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 + +NOTE: **Providing your own Redis instance:** +Managed Redis from cloud providers such as AWS ElastiCache will work. If these +services support high availability, be sure it is **not** the Redis Cluster type. +Redis version 5.0 or higher is required, as this is what ships with +Omnibus GitLab packages starting with GitLab 13.0. Older Redis versions +do not support an optional count argument to SPOP which is now required for +[Merge Trains](../../ci/merge_request_pipelines/pipelines_for_merged_results/merge_trains/index.md). +Note the Redis node's IP address or hostname, port, and password (if required). +These will be necessary when configuring the +[GitLab application servers](#configure-gitlab-rails) later. + +### Configure the Redis and Sentinel Cache cluster + +This is the section where we install and set up the new Redis Cache instances. + +NOTE: **Note:** +Redis nodes (both primary and replica) will need the same password defined in +`redis['password']`. At any time during a failover the Sentinels can +reconfigure a node and change its status from primary to replica and vice versa. + +#### Configure the primary Redis Cache node + +1. SSH into the **Primary** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_master_role' + roles ['redis_master_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.51' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # Set up password authentication for Redis (use the same password in all nodes). + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Prevent database migrations from running on upgrade + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +#### Configure the replica Redis Cache nodes + +1. SSH into the **replica** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_replica_role' + roles ['redis_replica_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.52' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # The same password for Redis authentication you set up for the primary node. + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + # The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.51' + + # Port of primary Redis server, uncomment to change to non default. Defaults + # to `6379`. + #redis['master_port'] = 6379 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Prevent database migrations from running on upgrade + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other replica nodes, and + make sure to set up the IPs correctly. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +These values don't have to be changed again in `/etc/gitlab/gitlab.rb` after +a failover, as the nodes will be managed by the [Sentinels](#configure-the-sentinel-cache-nodes), and even after a +`gitlab-ctl reconfigure`, they will get their configuration restored by +the same Sentinels. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/redis.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### Configure the Sentinel Cache nodes + +NOTE: **Note:** +If you are using an external Redis Sentinel instance, be sure +to exclude the `requirepass` parameter from the Sentinel +configuration. This parameter will cause clients to report `NOAUTH +Authentication required.`. [Redis Sentinel 3.2.x does not support +password authentication](https://github.com/antirez/redis/issues/3279). + +Now that the Redis servers are all set up, let's configure the Sentinel +servers. The following IPs will be used as an example: + +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 + +To configure the Sentinel Cache server: + +1. SSH into the server that will host Consul/Sentinel. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['redis_sentinel_role'] + + ## Must be the same in every sentinel node + redis['master_name'] = 'gitlab-redis-cache' + + ## The same password for Redis authentication you set up for the primary node. + redis['master_password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + ## The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.51' + + ## Define a port so Redis can listen for TCP requests which will allow other + ## machines to connect to it. + redis['port'] = 6379 + + ## Port of primary Redis server, uncomment to change to non default. Defaults + ## to `6379`. + #redis['master_port'] = 6379 + + ## Configure Sentinel's IP + sentinel['bind'] = '10.6.0.71' + + ## Port that Sentinel listens on, uncomment to change to non default. Defaults + ## to `26379`. + #sentinel['port'] = 26379 + + ## Quorum must reflect the amount of voting sentinels it take to start a failover. + ## Value must NOT be greater then the amount of sentinels. + ## + ## The quorum can be used to tune Sentinel in two ways: + ## 1. If a the quorum is set to a value smaller than the majority of Sentinels + ## we deploy, we are basically making Sentinel more sensible to primary failures, + ## triggering a failover as soon as even just a minority of Sentinels is no longer + ## able to talk with the primary. + ## 1. If a quorum is set to a value greater than the majority of Sentinels, we are + ## making Sentinel able to failover only when there are a very large number (larger + ## than majority) of well connected Sentinels which agree about the primary being down.s + sentinel['quorum'] = 2 + + ## Consider unresponsive server down after x amount of ms. + #sentinel['down_after_milliseconds'] = 10000 + + ## Specifies the failover timeout in milliseconds. It is used in many ways: + ## + ## - The time needed to re-start a failover after a previous failover was + ## already tried against the same primary by a given Sentinel, is two + ## times the failover timeout. + ## + ## - The time needed for a replica replicating to a wrong primary according + ## to a Sentinel current configuration, to be forced to replicate + ## with the right primary, is exactly the failover timeout (counting since + ## the moment a Sentinel detected the misconfiguration). + ## + ## - The time needed to cancel a failover that is already in progress but + ## did not produced any configuration change (REPLICAOF NO ONE yet not + ## acknowledged by the promoted replica). + ## + ## - The maximum time a failover in progress waits for all the replica to be + ## reconfigured as replicas of the new primary. However even after this time + ## the replicas will be reconfigured by the Sentinels anyway, but not with + ## the exact parallel-syncs progression as specified. + #sentinel['failover_timeout'] = 60000 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Consul/Sentinel nodes, and + make sure you set up the correct IPs. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +### Configure the Redis and Sentinel Queues cluster + +This is the section where we install and set up the new Redis Queues instances. + +NOTE: **Note:** +Redis nodes (both primary and replica) will need the same password defined in +`redis['password']`. At any time during a failover the Sentinels can +reconfigure a node and change its status from primary to replica and vice versa. + +#### Configure the primary Redis Queues node + +1. SSH into the **Primary** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_master_role' + roles ['redis_master_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.61' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # Set up password authentication for Redis (use the same password in all nodes). + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + ``` + +1. Only the primary GitLab application server should handle migrations. To + prevent database migrations from running on upgrade, add the following + configuration to your `/etc/gitlab/gitlab.rb` file: + + ```ruby + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +#### Configure the replica Redis Queues nodes + +1. SSH into the **replica** Redis Queue server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_replica_role' + roles ['redis_replica_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.62' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # The same password for Redis authentication you set up for the primary node. + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + # The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.61' + + # Port of primary Redis server, uncomment to change to non default. Defaults + # to `6379`. + #redis['master_port'] = 6379 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other replica nodes, and + make sure to set up the IPs correctly. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +These values don't have to be changed again in `/etc/gitlab/gitlab.rb` after +a failover, as the nodes will be managed by the [Sentinels](#configure-the-sentinel-queues-nodes), and even after a +`gitlab-ctl reconfigure`, they will get their configuration restored by +the same Sentinels. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/redis.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### Configure the Sentinel Queues nodes + +NOTE: **Note:** +If you are using an external Redis Sentinel instance, be sure +to exclude the `requirepass` parameter from the Sentinel +configuration. This parameter will cause clients to report `NOAUTH +Authentication required.`. [Redis Sentinel 3.2.x does not support +password authentication](https://github.com/antirez/redis/issues/3279). + +Now that the Redis servers are all set up, let's configure the Sentinel +servers. The following IPs will be used as an example: + +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 + +To configure the Sentinel Queues server: + +1. SSH into the server that will host Sentinel. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['redis_sentinel_role'] + + ## Must be the same in every sentinel node + redis['master_name'] = 'gitlab-redis-persistent' + + ## The same password for Redis authentication you set up for the primary node. + redis['master_password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + ## The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.61' + + ## Define a port so Redis can listen for TCP requests which will allow other + ## machines to connect to it. + redis['port'] = 6379 + + ## Port of primary Redis server, uncomment to change to non default. Defaults + ## to `6379`. + #redis['master_port'] = 6379 + + ## Configure Sentinel's IP + sentinel['bind'] = '10.6.0.81' + + ## Port that Sentinel listens on, uncomment to change to non default. Defaults + ## to `26379`. + #sentinel['port'] = 26379 + + ## Quorum must reflect the amount of voting sentinels it take to start a failover. + ## Value must NOT be greater then the amount of sentinels. + ## + ## The quorum can be used to tune Sentinel in two ways: + ## 1. If a the quorum is set to a value smaller than the majority of Sentinels + ## we deploy, we are basically making Sentinel more sensible to primary failures, + ## triggering a failover as soon as even just a minority of Sentinels is no longer + ## able to talk with the primary. + ## 1. If a quorum is set to a value greater than the majority of Sentinels, we are + ## making Sentinel able to failover only when there are a very large number (larger + ## than majority) of well connected Sentinels which agree about the primary being down.s + sentinel['quorum'] = 2 + + ## Consider unresponsive server down after x amount of ms. + #sentinel['down_after_milliseconds'] = 10000 + + ## Specifies the failover timeout in milliseconds. It is used in many ways: + ## + ## - The time needed to re-start a failover after a previous failover was + ## already tried against the same primary by a given Sentinel, is two + ## times the failover timeout. + ## + ## - The time needed for a replica replicating to a wrong primary according + ## to a Sentinel current configuration, to be forced to replicate + ## with the right primary, is exactly the failover timeout (counting since + ## the moment a Sentinel detected the misconfiguration). + ## + ## - The time needed to cancel a failover that is already in progress but + ## did not produced any configuration change (REPLICAOF NO ONE yet not + ## acknowledged by the promoted replica). + ## + ## - The maximum time a failover in progress waits for all the replica to be + ## reconfigured as replicas of the new primary. However even after this time + ## the replicas will be reconfigured by the Sentinels anyway, but not with + ## the exact parallel-syncs progression as specified. + #sentinel['failover_timeout'] = 60000 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. To prevent database migrations from running on upgrade, run: + + ```shell + sudo touch /etc/gitlab/skip-auto-reconfigure + ``` + + Only the primary GitLab application server should handle migrations. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Sentinel nodes, and + make sure you set up the correct IPs. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Gitaly + +Deploying Gitaly in its own server can benefit GitLab installations that are +larger than a single machine. + +The Gitaly node requirements are dependent on customer data, specifically the number of +projects and their repository sizes. Two nodes are recommended as an absolute minimum. +Each Gitaly node should store no more than 5TB of data and have the number of +[`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) set to 20% of available CPUs. +Additional nodes should be considered in conjunction with a review of expected +data size and spread based on the recommendations above. + +It is also strongly recommended that all Gitaly nodes be set up with SSD disks with +a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write, +as Gitaly has heavy I/O. These IOPS values are recommended only as a starter as with +time they may be adjusted higher or lower depending on the scale of your environment's workload. +If you're running the environment on a Cloud provider, you may need to refer to +their documentation on how to configure IOPS correctly. + +Some things to note: + +- The GitLab Rails application shards repositories into [repository storages](../repository_storage_paths.md). +- A Gitaly server can host one or more storages. +- A GitLab server can use one or more Gitaly servers. +- Gitaly addresses must be specified in such a way that they resolve + correctly for ALL Gitaly clients. +- Gitaly servers must not be exposed to the public internet, as Gitaly's network + traffic is unencrypted by default. The use of a firewall is highly recommended + to restrict access to the Gitaly server. Another option is to + [use TLS](#gitaly-tls-support). + +TIP: **Tip:** +For more information about Gitaly's history and network architecture see the +[standalone Gitaly documentation](../gitaly/index.md). + +Note: **Note:** +The token referred to throughout the Gitaly documentation is +just an arbitrary password selected by the administrator. It is unrelated to +tokens created for the GitLab API or other similar web API tokens. + +Below we describe how to configure two Gitaly servers, with IPs and +domain names: + +- `10.6.0.91`: Gitaly 1 (`gitaly1.internal`) +- `10.6.0.92`: Gitaly 2 (`gitaly2.internal`) + +The secret token is assumed to be `gitalysecret` and that +your GitLab installation has three repository storages: + +- `default` on Gitaly 1 +- `storage1` on Gitaly 1 +- `storage2` on Gitaly 2 + +On each node: + +1. [Download/Install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page but + **without** providing the `EXTERNAL_URL` value. +1. Edit `/etc/gitlab/gitlab.rb` to configure storage paths, enable + the network listener and configure the token: + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + + ```ruby + # /etc/gitlab/gitlab.rb + + # Gitaly and GitLab use two shared secrets for authentication, one to authenticate gRPC requests + # to Gitaly, and a second for authentication callbacks from GitLab-Shell to the GitLab internal API. + # The following two values must be the same as their respective values + # of the GitLab Rails application setup + gitaly['auth_token'] = 'gitalysecret' + gitlab_shell['secret_token'] = 'shellsecret' + + # Avoid running unnecessary services on the Gitaly server + postgresql['enable'] = false + redis['enable'] = false + nginx['enable'] = false + puma['enable'] = false + unicorn['enable'] = false + sidekiq['enable'] = false + gitlab_workhorse['enable'] = false + grafana['enable'] = false + + # If you run a seperate monitoring node you can disable these services + alertmanager['enable'] = false + prometheus['enable'] = false + + # Prevent database connections during 'gitlab-ctl reconfigure' + gitlab_rails['rake_cache_clear'] = false + gitlab_rails['auto_migrate'] = false + + # Configure the gitlab-shell API callback URL. Without this, `git push` will + # fail. This can be your 'front door' GitLab URL or an internal load + # balancer. + # Don't forget to copy `/etc/gitlab/gitlab-secrets.json` from web server to Gitaly server. + gitlab_rails['internal_api_url'] = 'https://gitlab.example.com' + + # Make Gitaly accept connections on all network interfaces. You must use + # firewalls to restrict access to this address/port. + # Comment out following line if you only want to support TLS connections + gitaly['listen_addr'] = "0.0.0.0:8075" + ``` + +1. Append the following to `/etc/gitlab/gitlab.rb` for each respective server: + 1. On `gitaly1.internal`: + + ```ruby + git_data_dirs({ + 'default' => { + 'path' => '/var/opt/gitlab/git-data' + }, + 'storage1' => { + 'path' => '/mnt/gitlab/git-data' + }, + }) + ``` + + 1. On `gitaly2.internal`: + + ```ruby + git_data_dirs({ + 'storage2' => { + 'path' => '/mnt/gitlab/git-data' + }, + }) + ``` + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). + +### Gitaly TLS support + +Gitaly supports TLS encryption. To be able to communicate +with a Gitaly instance that listens for secure connections you will need to use `tls://` URL +scheme in the `gitaly_address` of the corresponding storage entry in the GitLab configuration. + +You will need to bring your own certificates as this isn't provided automatically. +The certificate, or its certificate authority, must be installed on all Gitaly +nodes (including the Gitaly node using the certificate) and on all client nodes +that communicate with it following the procedure described in +[GitLab custom certificate configuration](https://docs.gitlab.com/omnibus/settings/ssl.html#install-custom-public-certificates). + +NOTE: **Note:** +The self-signed certificate must specify the address you use to access the +Gitaly server. If you are addressing the Gitaly server by a hostname, you can +either use the Common Name field for this, or add it as a Subject Alternative +Name. If you are addressing the Gitaly server by its IP address, you must add it +as a Subject Alternative Name to the certificate. +[gRPC does not support using an IP address as Common Name in a certificate](https://github.com/grpc/grpc/issues/2691). + +NOTE: **Note:** +It is possible to configure Gitaly servers with both an +unencrypted listening address `listen_addr` and an encrypted listening +address `tls_listen_addr` at the same time. This allows you to do a +gradual transition from unencrypted to encrypted traffic, if necessary. + +To configure Gitaly with TLS: + +1. Create the `/etc/gitlab/ssl` directory and copy your key and certificate there: + + ```shell + sudo mkdir -p /etc/gitlab/ssl + sudo chmod 755 /etc/gitlab/ssl + sudo cp key.pem cert.pem /etc/gitlab/ssl/ + sudo chmod 644 key.pem cert.pem + ``` + +1. Copy the cert to `/etc/gitlab/trusted-certs` so Gitaly will trust the cert when + calling into itself: + + ```shell + sudo cp /etc/gitlab/ssl/cert.pem /etc/gitlab/trusted-certs/ + ``` + +1. Edit `/etc/gitlab/gitlab.rb` and add: + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + + ```ruby + gitaly['tls_listen_addr'] = "0.0.0.0:9999" + gitaly['certificate_path'] = "/etc/gitlab/ssl/cert.pem" + gitaly['key_path'] = "/etc/gitlab/ssl/key.pem" + ``` + +1. Delete `gitaly['listen_addr']` to allow only encrypted connections. + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Sidekiq + +Sidekiq requires connections to the Redis, PostgreSQL and Gitaly instances. +The following IPs will be used as an example: + +- `10.6.0.101`: Sidekiq 1 +- `10.6.0.102`: Sidekiq 2 +- `10.6.0.103`: Sidekiq 3 +- `10.6.0.104`: Sidekiq 4 + +To configure the Sidekiq nodes, on each one: + +1. SSH into the Sidekiq server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab package +you want using steps 1 and 2 from the GitLab downloads page. +**Do not complete any other steps on the download page.** +1. Open `/etc/gitlab/gitlab.rb` with your editor: + + ```ruby + ######################################## + ##### Services Disabled ### + ######################################## + + nginx['enable'] = false + grafana['enable'] = false + prometheus['enable'] = false + alertmanager['enable'] = false + gitaly['enable'] = false + gitlab_workhorse['enable'] = false + nginx['enable'] = false + puma['enable'] = false + postgres_exporter['enable'] = false + postgresql['enable'] = false + redis['enable'] = false + redis_exporter['enable'] = false + gitlab_exporter['enable'] = false + + ######################################## + #### Redis ### + ######################################## + + ## Redis connection details + ## First cluster that will host the cache + gitlab_rails['redis_cache_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER>@gitlab-redis-cache' + + gitlab_rails['redis_cache_sentinels'] = [ + {host: '10.6.0.71', port: 26379}, + {host: '10.6.0.72', port: 26379}, + {host: '10.6.0.73', port: 26379}, + ] + + ## Second cluster that will host the queues, shared state, and actioncable + gitlab_rails['redis_queues_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_shared_state_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_actioncable_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + + gitlab_rails['redis_queues_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_shared_state_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_actioncable_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + + ####################################### + ### Gitaly ### + ####################################### + + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage1' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' }, + }) + gitlab_rails['gitaly_token'] = 'YOUR_TOKEN' + + ####################################### + ### Postgres ### + ####################################### + gitlab_rails['db_host'] = '10.6.0.20' # internal load balancer IP + gitlab_rails['db_port'] = 6432 + gitlab_rails['db_password'] = '<postgresql_user_password>' + gitlab_rails['db_adapter'] = 'postgresql' + gitlab_rails['db_encoding'] = 'unicode' + gitlab_rails['auto_migrate'] = false + + ####################################### + ### Sidekiq configuration ### + ####################################### + sidekiq['listen_address'] = "0.0.0.0" + sidekiq['cluster'] = true # no need to set this after GitLab 13.0 + + ####################################### + ### Monitoring configuration ### + ####################################### + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + + # Rails Status for prometheus + gitlab_rails['monitoring_whitelist'] = ['10.6.0.121/32', '127.0.0.0/8'] + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +TIP: **Tip:** +You can also run [multiple Sidekiq processes](../operations/extra_sidekiq_processes.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure GitLab Rails + +NOTE: **Note:** +In our architectures we run each GitLab Rails node using the Puma webserver +and have its number of workers set to 90% of available CPUs along with four threads. For +nodes that are running Rails with other components the worker value should be reduced +accordingly where we've found 50% achieves a good balance but this is dependent +on workload. + +This section describes how to configure the GitLab application (Rails) component. + +The following IPs will be used as an example: + +- `10.6.0.111`: GitLab application 1 +- `10.6.0.112`: GitLab application 2 +- `10.6.0.113`: GitLab application 3 + +On each node perform the following: + +1. Download/install Omnibus GitLab using **steps 1 and 2** from + [GitLab downloads](https://about.gitlab.com/install/). Do not complete other + steps on the download page. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Edit `/etc/gitlab/gitlab.rb` and use the following configuration. + To maintain uniformity of links across nodes, the `external_url` + on the application server should point to the external URL that users will use + to access GitLab. This would be the URL of the [external load balancer](#configure-the-external-load-balancer) + which will route traffic to the GitLab application server: + + ```ruby + external_url 'https://gitlab.example.com' + + # Gitaly and GitLab use two shared secrets for authentication, one to authenticate gRPC requests + # to Gitaly, and a second for authentication callbacks from GitLab-Shell to the GitLab internal API. + # The following two values must be the same as their respective values + # of the Gitaly setup + gitlab_rails['gitaly_token'] = 'gitalysecret' + gitlab_shell['secret_token'] = 'shellsecret' + + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage1' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' }, + }) + + ## Disable components that will not be on the GitLab application server + roles ['application_role'] + gitaly['enable'] = false + nginx['enable'] = true + + ## PostgreSQL connection details + # Disable PostgreSQL on the application node + postgresql['enable'] = false + gitlab_rails['db_host'] = '10.6.0.20' # internal load balancer IP + gitlab_rails['db_port'] = 6432 + gitlab_rails['db_password'] = '<postgresql_user_password>' + gitlab_rails['auto_migrate'] = false + + ## Redis connection details + ## First cluster that will host the cache + gitlab_rails['redis_cache_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER>@gitlab-redis-cache' + + gitlab_rails['redis_cache_sentinels'] = [ + {host: '10.6.0.71', port: 26379}, + {host: '10.6.0.72', port: 26379}, + {host: '10.6.0.73', port: 26379}, + ] + + ## Second cluster that will host the queues, shared state, and actionable + gitlab_rails['redis_queues_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_shared_state_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_actioncable_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + + gitlab_rails['redis_queues_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_shared_state_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_actioncable_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + + # Set the network addresses that the exporters used for monitoring will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + gitlab_workhorse['prometheus_listen_addr'] = '0.0.0.0:9229' + sidekiq['listen_address'] = "0.0.0.0" + puma['listen'] = '0.0.0.0' + + # Add the monitoring node's IP address to the monitoring whitelist and allow it to + # scrape the NGINX metrics + gitlab_rails['monitoring_whitelist'] = ['10.6.0.121/32', '127.0.0.0/8'] + nginx['status']['options']['allow'] = ['10.6.0.121/32', '127.0.0.0/8'] + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. If you're using [Gitaly with TLS support](#gitaly-tls-support), make sure the + `git_data_dirs` entry is configured with `tls` instead of `tcp`: + + ```ruby + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' }, + 'storage1' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' }, + 'storage2' => { 'gitaly_address' => 'tls://gitaly2.internal:9999' }, + }) + ``` + + 1. Copy the cert into `/etc/gitlab/trusted-certs`: + + ```shell + sudo cp cert.pem /etc/gitlab/trusted-certs/ + ``` + +1. If you're [using NFS](#configure-nfs-optional): + 1. If necessary, install the NFS client utility packages using the following + commands: + + ```shell + # Ubuntu/Debian + apt-get install nfs-common + + # CentOS/Red Hat + yum install nfs-utils nfs-utils-lib + ``` + + 1. Specify the necessary NFS mounts in `/etc/fstab`. + The exact contents of `/etc/fstab` will depend on how you chose + to configure your NFS server. See the [NFS documentation](../high_availability/nfs.md) + for examples and the various options. + + 1. Create the shared directories. These may be different depending on your NFS + mount locations. + + ```shell + mkdir -p /var/opt/gitlab/.ssh /var/opt/gitlab/gitlab-rails/uploads /var/opt/gitlab/gitlab-rails/shared /var/opt/gitlab/gitlab-ci/builds /var/opt/gitlab/git-data + ``` + + 1. Edit `/etc/gitlab/gitlab.rb` and use the following configuration: + + ```ruby + ## Prevent GitLab from starting if NFS data mounts are not available + high_availability['mountpoint'] = '/var/opt/gitlab/git-data' + + ## Ensure UIDs and GIDs match between servers for permissions via NFS + user['uid'] = 9000 + user['gid'] = 9000 + web_server['uid'] = 9001 + web_server['gid'] = 9001 + registry['uid'] = 9002 + registry['gid'] = 9002 + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. Confirm the node can connect to Gitaly: + + ```shell + sudo gitlab-rake gitlab:gitaly:check + ``` + + Then, tail the logs to see the requests: + + ```shell + sudo gitlab-ctl tail gitaly + ``` + +1. Optionally, from the Gitaly servers, confirm that Gitaly can perform callbacks to the internal API: + + ```shell + sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml + ``` + +NOTE: **Note:** +When you specify `https` in the `external_url`, as in the example +above, GitLab assumes you have SSL certificates in `/etc/gitlab/ssl/`. If +certificates are not present, NGINX will fail to start. See the +[NGINX documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for more information. + +### GitLab Rails post-configuration + +Initialize the GitLab database, by running the following in one of the Rails nodes: + +```shell +sudo gitlab-rake gitlab:db:configure +``` + +NOTE: **Note:** +If you encounter a `rake aborted!` error stating that PgBouncer is failing to connect to +PostgreSQL it may be that your PgBouncer node's IP address is missing from +PostgreSQL's `trust_auth_cidr_addresses` in `gitlab.rb` on your database nodes. See +[PgBouncer error `ERROR: pgbouncer cannot connect to server`](troubleshooting.md#pgbouncer-error-error-pgbouncer-cannot-connect-to-server) +in the Troubleshooting section before proceeding. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Prometheus + +The Omnibus GitLab package can be used to configure a standalone Monitoring node +running [Prometheus](../monitoring/prometheus/index.md) and +[Grafana](../monitoring/performance/grafana_configuration.md). + +The following IP will be used as an example: + +- `10.6.0.121`: Prometheus + +To configure the Monitoring node: + +1. SSH into the Monitoring node. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + Do not complete any other steps on the download page. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + external_url 'http://gitlab.example.com' + + # Disable all other services + gitlab_rails['auto_migrate'] = false + alertmanager['enable'] = false + gitaly['enable'] = false + gitlab_exporter['enable'] = false + gitlab_workhorse['enable'] = false + nginx['enable'] = true + postgres_exporter['enable'] = false + postgresql['enable'] = false + redis['enable'] = false + redis_exporter['enable'] = false + sidekiq['enable'] = false + puma['enable'] = false + unicorn['enable'] = false + node_exporter['enable'] = false + gitlab_exporter['enable'] = false + + # Enable Prometheus + prometheus['enable'] = true + prometheus['listen_address'] = '0.0.0.0:9090' + prometheus['monitor_kubernetes'] = false + + # Enable Login form + grafana['disable_login_form'] = false + + # Enable Grafana + grafana['enable'] = true + grafana['admin_password'] = '<grafana_password>' + + # Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. In the GitLab UI, set `admin/application_settings/metrics_and_profiling` > Metrics - Grafana to `/-/grafana` to +`http[s]://<MONITOR NODE>/-/grafana` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure the object storage + +GitLab supports using an object storage service for holding numerous types of data. +It's recommended over [NFS](#configure-nfs-optional) and in general it's better +in larger setups as object storage is typically much more performant, reliable, +and scalable. + +Object storage options that GitLab has tested, or is aware of customers using include: + +- SaaS/Cloud solutions such as [Amazon S3](https://aws.amazon.com/s3/), [Google cloud storage](https://cloud.google.com/storage). +- On-premises hardware and appliances from various storage vendors. +- MinIO. There is [a guide to deploying this](https://docs.gitlab.com/charts/advanced/external-object-storage/minio.html) within our Helm Chart documentation. + +For configuring GitLab to use Object Storage refer to the following guides +based on what features you intend to use: + +1. Configure [object storage for backups](../../raketasks/backup_restore.md#uploading-backups-to-a-remote-cloud-storage). +1. Configure [object storage for job artifacts](../job_artifacts.md#using-object-storage) + including [incremental logging](../job_logs.md#new-incremental-logging-architecture). +1. Configure [object storage for LFS objects](../lfs/index.md#storing-lfs-objects-in-remote-object-storage). +1. Configure [object storage for uploads](../uploads.md#using-object-storage-core-only). +1. Configure [object storage for merge request diffs](../merge_request_diffs.md#using-object-storage). +1. Configure [object storage for Container Registry](../packages/container_registry.md#use-object-storage) (optional feature). +1. Configure [object storage for Mattermost](https://docs.mattermost.com/administration/config-settings.html#file-storage) (optional feature). +1. Configure [object storage for packages](../packages/index.md#using-object-storage) (optional feature). **(PREMIUM ONLY)** +1. Configure [object storage for Dependency Proxy](../packages/dependency_proxy.md#using-object-storage) (optional feature). **(PREMIUM ONLY)** +1. Configure [object storage for Pseudonymizer](../pseudonymizer.md#configuration) (optional feature). **(ULTIMATE ONLY)** +1. Configure [object storage for autoscale Runner caching](https://docs.gitlab.com/runner/configuration/autoscale.html#distributed-runners-caching) (optional - for improved performance). +1. Configure [object storage for Terraform state files](../terraform_state.md#using-object-storage-core-only). + +Using separate buckets for each data type is the recommended approach for GitLab. + +A limitation of our configuration is that each use of object storage is separately configured. +[We have an issue for improving this](https://gitlab.com/gitlab-org/gitlab/-/issues/23345) +and easily using one bucket with separate folders is one improvement that this might bring. + +There is at least one specific issue with using the same bucket: +when GitLab is deployed with the Helm chart restore from backup +[will not properly function](https://docs.gitlab.com/charts/advanced/external-object-storage/#lfs-artifacts-uploads-packages-external-diffs-pseudonymizer) +unless separate buckets are used. + +One risk of using a single bucket would be if your organization decided to +migrate GitLab to the Helm deployment in the future. GitLab would run, but the situation with +backups might not be realized until the organization had a critical requirement for the backups to +work. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure NFS (optional) + +[Object storage](#configure-the-object-storage), along with [Gitaly](#configure-gitaly) +are recommended over NFS wherever possible for improved performance. If you intend +to use GitLab Pages, this currently [requires NFS](troubleshooting.md#gitlab-pages-requires-nfs). + +See how to [configure NFS](../high_availability/nfs.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Troubleshooting + +See the [troubleshooting documentation](troubleshooting.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> diff --git a/doc/administration/reference_architectures/2k_users.md b/doc/administration/reference_architectures/2k_users.md index d182daf45b3..a7feb78a365 100644 --- a/doc/administration/reference_architectures/2k_users.md +++ b/doc/administration/reference_architectures/2k_users.md @@ -1,27 +1,30 @@ --- reading_time: true +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers --- -# Reference architecture: up to 2,000 users +# Reference architecture: up to 2,000 users **(CORE ONLY)** This page describes GitLab reference architecture for up to 2,000 users. For a full list of reference architectures, see [Available reference architectures](index.md#available-reference-architectures). > - **Supported users (approximate):** 2,000 -> - **High Availability:** False +> - **High Availability:** No > - **Test requests per second (RPS) rates:** API: 40 RPS, Web: 4 RPS, Git: 4 RPS -| Service | Nodes | Configuration | GCP | AWS | Azure | -|------------------------------------------|--------|-------------------------|-----------------|----------------|-----------| -| Load balancer | 1 | 2 vCPU, 1.8GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| PostgreSQL | 1 | 2 vCPU, 7.5GB memory | `n1-standard-2` | `m5.large` | `D2s v3` | -| Redis | 1 | 1 vCPU, 3.75GB memory | `n1-standard-1` | `m5.large` | `D2s v3` | -| Gitaly | 1 | 4 vCPU, 15GB memory | `n1-standard-4` | `m5.xlarge` | `D4s v3` | -| GitLab Rails | 2 | 8 vCPU, 7.2GB memory | `n1-highcpu-8` | `c5.2xlarge` | `F8s v2` | -| Monitoring node | 1 | 2 vCPU, 1.8GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Object storage | n/a | n/a | n/a | n/a | n/a | -| NFS server (optional, not recommended) | 1 | 4 vCPU, 3.6GB memory | `n1-highcpu-4` | `c5.xlarge` | `F4s v2` | +| Service | Nodes | Configuration | GCP | AWS | Azure | +|------------------------------------------|--------|-------------------------|----------------|--------------|---------| +| Load balancer | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| PostgreSQL | 1 | 2 vCPU, 7.5GB memory | n1-standard-2 | m5.large | D2s v3 | +| Redis | 1 | 1 vCPU, 3.75GB memory | n1-standard-1 | m5.large | D2s v3 | +| Gitaly | 1 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| GitLab Rails | 2 | 8 vCPU, 7.2GB memory | n1-highcpu-8 | c5.2xlarge | F8s v2 | +| Monitoring node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Object storage | n/a | n/a | n/a | n/a | n/a | +| NFS server (optional, not recommended) | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | The Google Cloud Platform (GCP) architectures were built and tested using the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) @@ -554,7 +557,7 @@ On each node perform the following: 1. Specify the necessary NFS mounts in `/etc/fstab`. The exact contents of `/etc/fstab` will depend on how you chose - to configure your NFS server. See the [NFS documentation](../high_availability/nfs.md) + to configure your NFS server. See the [NFS documentation](../nfs.md) for examples and the various options. 1. Create the shared directories. These may be different depending on your NFS @@ -852,7 +855,7 @@ along with [Gitaly](#configure-gitaly), are recommended over using NFS whenever possible. However, if you intend to use GitLab Pages, [you must use NFS](troubleshooting.md#gitlab-pages-requires-nfs). -For information about configuring NFS, see the [NFS documentation page](../high_availability/nfs.md). +For information about configuring NFS, see the [NFS documentation page](../nfs.md). <div align="right"> <a type="button" class="btn btn-default" href="#setup-components"> diff --git a/doc/administration/reference_architectures/3k_users.md b/doc/administration/reference_architectures/3k_users.md index 04cb9fa4769..2f88413de6f 100644 --- a/doc/administration/reference_architectures/3k_users.md +++ b/doc/administration/reference_architectures/3k_users.md @@ -1,49 +1,54 @@ --- reading_time: true +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers --- -# Reference architecture: up to 3,000 users +# Reference architecture: up to 3,000 users **(PREMIUM ONLY)** -This page describes GitLab reference architecture for up to 3,000 users. -For a full list of reference architectures, see +This page describes GitLab reference architecture for up to 3,000 users. For a +full list of reference architectures, see [Available reference architectures](index.md#available-reference-architectures). NOTE: **Note:** -The 3,000-user reference architecture documented below is -designed to help your organization achieve a highly-available GitLab deployment. -If you do not have the expertise or need to maintain a highly-available -environment, you can have a simpler and less costly-to-operate environment by -following the [2,000-user reference architecture](2k_users.md). +This reference architecture is designed to help your organization achieve a +highly-available GitLab deployment. If you do not have the expertise or need to +maintain a highly-available environment, you can have a simpler and less +costly-to-operate environment by using the +[2,000-user reference architecture](2k_users.md). > - **Supported users (approximate):** 3,000 -> - **High Availability:** True -> - **Test RPS rates:** API: 60 RPS, Web: 6 RPS, Git: 6 RPS - -| Service | Nodes | Configuration | GCP | AWS | Azure | -|--------------------------------------------------------------|-------|---------------------------------|-----------------|-------------------------|----------------| -| External load balancing node | 1 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Redis | 3 | 2 vCPU, 7.5GB Memory | `n1-standard-2` | `m5.large` | `D2s v3` | -| Consul + Sentinel | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| PostgreSQL | 3 | 2 vCPU, 7.5GB Memory | `n1-standard-2` | `m5.large` | `D2s v3` | -| PgBouncer | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Internal load balancing node | 1 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Gitaly | 2 minimum | 4 vCPU, 15GB Memory | `n1-standard-4` | `m5.xlarge` | `D4s v3` | -| Sidekiq | 4 | 2 vCPU, 7.5GB Memory | `n1-standard-2` | `m5.large` | `D2s v3` | -| GitLab Rails | 3 | 8 vCPU, 7.2GB Memory | `n1-highcpu-8` | `c5.2xlarge` | `F8s v2` | -| Monitoring node | 1 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Object Storage | n/a | n/a | n/a | n/a | n/a | -| NFS Server (optional, not recommended) | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | `F4s v2` | - -The architectures were built and tested with the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) -CPU platform on GCP. On different hardware you may find that adjustments, either lower -or higher, are required for your CPU or Node counts accordingly. For more information, a -[Sysbench](https://github.com/akopytov/sysbench) benchmark of the CPU can be found -[here](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). - -For data objects such as LFS, Uploads, Artifacts, etc, an [object storage service](#configure-the-object-storage) -is recommended over NFS where possible, due to better performance and availability. -Since this doesn't require a node to be set up, it's marked as not applicable (n/a) -in the table above. +> - **High Availability:** Yes +> - **Test requests per second (RPS) rates:** API: 60 RPS, Web: 6 RPS, Git: 6 RPS + +| Service | Nodes | Configuration | GCP | AWS | Azure | +|--------------------------------------------|-------------|-----------------------|----------------|-------------|---------| +| External load balancing node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Redis | 3 | 2 vCPU, 7.5GB memory | n1-standard-2 | m5.large | D2s v3 | +| Consul + Sentinel | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| PostgreSQL | 3 | 2 vCPU, 7.5GB memory | n1-standard-2 | m5.large | D2s v3 | +| PgBouncer | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Internal load balancing node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Gitaly | 2 (minimum) | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| Sidekiq | 4 | 2 vCPU, 7.5GB memory | n1-standard-2 | m5.large | D2s v3 | +| GitLab Rails | 3 | 8 vCPU, 7.2GB memory | n1-highcpu-8 | c5.2xlarge | F8s v2 | +| Monitoring node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Object Storage | n/a | n/a | n/a | n/a | n/a | +| NFS Server (optional, not recommended) | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | + +The Google Cloud Platform (GCP) architectures were built and tested using the +[Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) +CPU platform. On different hardware you may find that adjustments, either lower +or higher, are required for your CPU or node counts. For more information, see +our [Sysbench](https://github.com/akopytov/sysbench)-based +[CPU benchmark](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). + +For data objects (such as LFS, Uploads, or Artifacts), an +[object storage service](#configure-the-object-storage) is recommended instead +of NFS where possible, due to better performance and availability. Since this +doesn't require a node to be set up, *Object Storage* is noted as not +applicable (n/a) in the previous table. ## Setup components @@ -804,10 +809,11 @@ SSH into the **primary node**: gitlab-psql -d gitlabhq_production ``` -1. Enable the `pg_trgm` extension: +1. Enable the `pg_trgm` and `btree_gist` extensions: ```shell CREATE EXTENSION pg_trgm; + CREATE EXTENSION btree_gist; ``` 1. Exit the database prompt by typing `\q` and Enter. @@ -1439,7 +1445,7 @@ On each node perform the following: 1. Specify the necessary NFS mounts in `/etc/fstab`. The exact contents of `/etc/fstab` will depend on how you chose - to configure your NFS server. See the [NFS documentation](../high_availability/nfs.md) + to configure your NFS server. See the [NFS documentation](../nfs.md) for examples and the various options. 1. Create the shared directories. These may be different depending on your NFS @@ -1748,7 +1754,7 @@ work. are recommended over NFS wherever possible for improved performance. If you intend to use GitLab Pages, this currently [requires NFS](troubleshooting.md#gitlab-pages-requires-nfs). -See how to [configure NFS](../high_availability/nfs.md). +See how to [configure NFS](../nfs.md). <div align="right"> <a type="button" class="btn btn-default" href="#setup-components"> diff --git a/doc/administration/reference_architectures/50k_users.md b/doc/administration/reference_architectures/50k_users.md index 2540fe68dac..565845b4bf5 100644 --- a/doc/administration/reference_architectures/50k_users.md +++ b/doc/administration/reference_architectures/50k_users.md @@ -1,76 +1,2047 @@ -# Reference architecture: up to 50,000 users +--- +reading_time: true +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers +--- -This page describes GitLab reference architecture for up to 50,000 users. -For a full list of reference architectures, see +# Reference architecture: up to 50,000 users **(PREMIUM ONLY)** + +This page describes GitLab reference architecture for up to 50,000 users. For a +full list of reference architectures, see [Available reference architectures](index.md#available-reference-architectures). > - **Supported users (approximate):** 50,000 -> - **High Availability:** True -> - **Test RPS rates:** API: 1000 RPS, Web: 100 RPS, Git: 100 RPS - -| Service | Nodes | Configuration ([8](#footnotes)) | GCP | AWS | Azure | -|--------------------------------------------------------------|-------|---------------------------------|----------------|-----------------------|----------------| -| GitLab Rails ([1](#footnotes)) | 12 | 32 vCPU, 28.8GB Memory | `n1-highcpu-32` | `c5.9xlarge` | F32s v2 | -| PostgreSQL | 3 | 16 vCPU, 60GB Memory | `n1-standard-16` | `m5.4xlarge` | D16s v3 | -| PgBouncer | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | F2s v2 | -| Gitaly ([2](#footnotes)) ([5](#footnotes)) ([7](#footnotes)) | X | 64 vCPU, 240GB Memory | `n1-standard-64` | `m5.16xlarge` | D64s v3 | -| Redis ([3](#footnotes)) - Cache | 3 | 4 vCPU, 15GB Memory | `n1-standard-4` | `m5.xlarge` | D4s v3 | -| Redis ([3](#footnotes)) - Queues / Shared State | 3 | 4 vCPU, 15GB Memory | `n1-standard-4` | `m5.xlarge` | D4s v3 | -| Redis Sentinel ([3](#footnotes)) - Cache | 3 | 1 vCPU, 1.7GB Memory | `g1-small` | `t2.small` | B1MS | -| Redis Sentinel ([3](#footnotes)) - Queues / Shared State | 3 | 1 vCPU, 1.7GB Memory | `g1-small` | `t2.small` | B1MS | -| Consul | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | F2s v2 | -| Sidekiq | 4 | 4 vCPU, 15GB Memory | `n1-standard-4` | `m5.xlarge` | D4s v3 | -| NFS Server ([5](#footnotes)) ([7](#footnotes)) | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | F4s v2 | -| Object Storage ([4](#footnotes)) | - | - | - | - | - | -| Monitoring node | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | F4s v2 | -| External load balancing node ([6](#footnotes)) | 1 | 8 vCPU, 7.2GB Memory | `n1-highcpu-8` | `c5.2xlarge` | F8s v2 | -| Internal load balancing node ([6](#footnotes)) | 1 | 8 vCPU, 7.2GB Memory | `n1-highcpu-8` | `c5.2xlarge` | F8s v2 | - -## Footnotes - -1. In our architectures we run each GitLab Rails node using the Puma webserver - and have its number of workers set to 90% of available CPUs along with four threads. For - nodes that are running Rails with other components the worker value should be reduced - accordingly where we've found 50% achieves a good balance but this is dependent - on workload. - -1. Gitaly node requirements are dependent on customer data, specifically the number of - projects and their sizes. We recommend two nodes as an absolute minimum for HA environments - and at least four nodes should be used when supporting 50,000 or more users. - We also recommend that each Gitaly node should store no more than 5TB of data - and have the number of [`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) - set to 20% of available CPUs. Additional nodes should be considered in conjunction - with a review of expected data size and spread based on the recommendations above. - -1. Recommended Redis setup differs depending on the size of the architecture. - For smaller architectures (less than 3,000 users) a single instance should suffice. - For medium sized installs (3,000 - 5,000) we suggest one Redis cluster for all - classes and that Redis Sentinel is hosted alongside Consul. - For larger architectures (10,000 users or more) we suggest running a separate - [Redis Cluster](../redis/replication_and_failover.md#running-multiple-redis-clusters) for the Cache class - and another for the Queues and Shared State classes respectively. We also recommend - that you run the Redis Sentinel clusters separately for each Redis Cluster. - -1. For data objects such as LFS, Uploads, Artifacts, etc. We recommend an [Object Storage service](../object_storage.md) - over NFS where possible, due to better performance and availability. - -1. NFS can be used as an alternative for both repository data (replacing Gitaly) and - object storage but this isn't typically recommended for performance reasons. Note however it is required for - [GitLab Pages](https://gitlab.com/gitlab-org/gitlab-pages/-/issues/196). - -1. Our architectures have been tested and validated with [HAProxy](https://www.haproxy.org/) - as the load balancer. Although other load balancers with similar feature sets - could also be used, those load balancers have not been validated. - -1. We strongly recommend that any Gitaly or NFS nodes be set up with SSD disks over - HDD with a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write - as these components have heavy I/O. These IOPS values are recommended only as a starter - as with time they may be adjusted higher or lower depending on the scale of your - environment's workload. If you're running the environment on a Cloud provider - you may need to refer to their documentation on how configure IOPS correctly. - -1. The architectures were built and tested with the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) - CPU platform on GCP. On different hardware you may find that adjustments, either lower - or higher, are required for your CPU or Node counts accordingly. For more information, a - [Sysbench](https://github.com/akopytov/sysbench) benchmark of the CPU can be found - [here](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). +> - **High Availability:** Yes +> - **Test requests per second (RPS) rates:** API: 1000 RPS, Web: 100 RPS, Git: 100 RPS + +| Service | Nodes | Configuration | GCP | AWS | Azure | +|-----------------------------------------|-------------|-------------------------|-----------------|--------------|----------| +| External load balancing node | 1 | 8 vCPU, 7.2GB memory | n1-highcpu-8 | c5.2xlarge | F8s v2 | +| Consul | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| PostgreSQL | 3 | 16 vCPU, 60GB memory | n1-standard-16 | m5.4xlarge | D16s v3 | +| PgBouncer | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Internal load balancing node | 1 | 8 vCPU, 7.2GB memory | n1-highcpu-8 | c5.2xlarge | F8s v2 | +| Redis - Cache | 3 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| Redis - Queues / Shared State | 3 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| Redis Sentinel - Cache | 3 | 1 vCPU, 1.7GB memory | g1-small | t2.small | B1MS | +| Redis Sentinel - Queues / Shared State | 3 | 1 vCPU, 1.7GB memory | g1-small | t2.small | B1MS | +| Gitaly | 2 (minimum) | 64 vCPU, 240GB memory | n1-standard-64 | m5.16xlarge | D64s v3 | +| Sidekiq | 4 | 4 vCPU, 15GB memory | n1-standard-4 | m5.xlarge | D4s v3 | +| GitLab Rails | 12 | 32 vCPU, 28.8GB memory | n1-highcpu-32 | c5.9xlarge | F32s v2 | +| Monitoring node | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | +| Object Storage | n/a | n/a | n/a | n/a | n/a | +| NFS Server | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | + +The Google Cloud Platform (GCP) architectures were built and tested using the +[Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) +CPU platform. On different hardware you may find that adjustments, either lower +or higher, are required for your CPU or node counts. For more information, see +our [Sysbench](https://github.com/akopytov/sysbench)-based +[CPU benchmark](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). + +For data objects (such as LFS, Uploads, or Artifacts), an +[object storage service](#configure-the-object-storage) is recommended instead +of NFS where possible, due to better performance and availability. Since this +doesn't require a node to be set up, *Object Storage* is noted as not +applicable (n/a) in the previous table. + +## Setup components + +To set up GitLab and its components to accommodate up to 50,000 users: + +1. [Configure the external load balancing node](#configure-the-external-load-balancer) + that will handle the load balancing of the three GitLab application services nodes. +1. [Configure Consul](#configure-consul). +1. [Configure PostgreSQL](#configure-postgresql), the database for GitLab. +1. [Configure PgBouncer](#configure-pgbouncer). +1. [Configure the internal load balancing node](#configure-the-internal-load-balancer) +1. [Configure Redis](#configure-redis). +1. [Configure Gitaly](#configure-gitaly), + which provides access to the Git repositories. +1. [Configure Sidekiq](#configure-sidekiq). +1. [Configure the main GitLab Rails application](#configure-gitlab-rails) + to run Puma/Unicorn, Workhorse, GitLab Shell, and to serve all frontend requests (UI, API, Git + over HTTP/SSH). +1. [Configure Prometheus](#configure-prometheus) to monitor your GitLab environment. +1. [Configure the Object Storage](#configure-the-object-storage) + used for shared data objects. +1. [Configure NFS (Optional)](#configure-nfs-optional) + to have shared disk storage service as an alternative to Gitaly and/or Object Storage (although + not recommended). NFS is required for GitLab Pages, you can skip this step if you're not using + that feature. + +We start with all servers on the same 10.6.0.0/24 private network range, they +can connect to each other freely on those addresses. + +Here is a list and description of each machine and the assigned IP: + +- `10.6.0.10`: External Load Balancer +- `10.6.0.11`: Consul 1 +- `10.6.0.12`: Consul 2 +- `10.6.0.13`: Consul 3 +- `10.6.0.21`: PostgreSQL primary +- `10.6.0.22`: PostgreSQL secondary 1 +- `10.6.0.23`: PostgreSQL secondary 2 +- `10.6.0.31`: PgBouncer 1 +- `10.6.0.32`: PgBouncer 2 +- `10.6.0.33`: PgBouncer 3 +- `10.6.0.40`: Internal Load Balancer +- `10.6.0.51`: Redis - Cache Primary +- `10.6.0.52`: Redis - Cache Replica 1 +- `10.6.0.53`: Redis - Cache Replica 2 +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 +- `10.6.0.61`: Redis - Queues Primary +- `10.6.0.62`: Redis - Queues Replica 1 +- `10.6.0.63`: Redis - Queues Replica 2 +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 +- `10.6.0.91`: Gitaly 1 +- `10.6.0.92`: Gitaly 2 +- `10.6.0.101`: Sidekiq 1 +- `10.6.0.102`: Sidekiq 2 +- `10.6.0.103`: Sidekiq 3 +- `10.6.0.104`: Sidekiq 4 +- `10.6.0.111`: GitLab application 1 +- `10.6.0.112`: GitLab application 2 +- `10.6.0.113`: GitLab application 3 +- `10.6.0.121`: Prometheus + +## Configure the external load balancer + +NOTE: **Note:** +This architecture has been tested and validated with [HAProxy](https://www.haproxy.org/) +as the load balancer. Although other load balancers with similar feature sets +could also be used, those load balancers have not been validated. + +In an active/active GitLab configuration, you will need a load balancer to route +traffic to the application servers. The specifics on which load balancer to use +or the exact configuration is beyond the scope of GitLab documentation. We hope +that if you're managing multi-node systems like GitLab you have a load balancer of +choice already. Some examples including HAProxy (open-source), F5 Big-IP LTM, +and Citrix Net Scaler. This documentation will outline what ports and protocols +you need to use with GitLab. + +The next question is how you will handle SSL in your environment. +There are several different options: + +- [The application node terminates SSL](#application-node-terminates-ssl). +- [The load balancer terminates SSL without backend SSL](#load-balancer-terminates-ssl-without-backend-ssl) + and communication is not secure between the load balancer and the application node. +- [The load balancer terminates SSL with backend SSL](#load-balancer-terminates-ssl-with-backend-ssl) + and communication is *secure* between the load balancer and the application node. + +### Application node terminates SSL + +Configure your load balancer to pass connections on port 443 as `TCP` rather +than `HTTP(S)` protocol. This will pass the connection to the application node's +NGINX service untouched. NGINX will have the SSL certificate and listen on port 443. + +See the [NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for details on managing SSL certificates and configuring NGINX. + +### Load balancer terminates SSL without backend SSL + +Configure your load balancer to use the `HTTP(S)` protocol rather than `TCP`. +The load balancer will then be responsible for managing SSL certificates and +terminating SSL. + +Since communication between the load balancer and GitLab will not be secure, +there is some additional configuration needed. See the +[NGINX proxied SSL documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#supporting-proxied-ssl) +for details. + +### Load balancer terminates SSL with backend SSL + +Configure your load balancer(s) to use the 'HTTP(S)' protocol rather than 'TCP'. +The load balancer(s) will be responsible for managing SSL certificates that +end users will see. + +Traffic will also be secure between the load balancer(s) and NGINX in this +scenario. There is no need to add configuration for proxied SSL since the +connection will be secure all the way. However, configuration will need to be +added to GitLab to configure SSL certificates. See +[NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for details on managing SSL certificates and configuring NGINX. + +### Ports + +The basic ports to be used are shown in the table below. + +| LB Port | Backend Port | Protocol | +| ------- | ------------ | ------------------------ | +| 80 | 80 | HTTP (*1*) | +| 443 | 443 | TCP or HTTPS (*1*) (*2*) | +| 22 | 22 | TCP | + +- (*1*): [Web terminal](../../ci/environments/index.md#web-terminals) support requires + your load balancer to correctly handle WebSocket connections. When using + HTTP or HTTPS proxying, this means your load balancer must be configured + to pass through the `Connection` and `Upgrade` hop-by-hop headers. See the + [web terminal](../integration/terminal.md) integration guide for + more details. +- (*2*): When using HTTPS protocol for port 443, you will need to add an SSL + certificate to the load balancers. If you wish to terminate SSL at the + GitLab application server instead, use TCP protocol. + +If you're using GitLab Pages with custom domain support you will need some +additional port configurations. +GitLab Pages requires a separate virtual IP address. Configure DNS to point the +`pages_external_url` from `/etc/gitlab/gitlab.rb` at the new virtual IP address. See the +[GitLab Pages documentation](../pages/index.md) for more information. + +| LB Port | Backend Port | Protocol | +| ------- | ------------- | --------- | +| 80 | Varies (*1*) | HTTP | +| 443 | Varies (*1*) | TCP (*2*) | + +- (*1*): The backend port for GitLab Pages depends on the + `gitlab_pages['external_http']` and `gitlab_pages['external_https']` + setting. See [GitLab Pages documentation](../pages/index.md) for more details. +- (*2*): Port 443 for GitLab Pages should always use the TCP protocol. Users can + configure custom domains with custom SSL, which would not be possible + if SSL was terminated at the load balancer. + +#### Alternate SSH Port + +Some organizations have policies against opening SSH port 22. In this case, +it may be helpful to configure an alternate SSH hostname that allows users +to use SSH on port 443. An alternate SSH hostname will require a new virtual IP address +compared to the other GitLab HTTP configuration above. + +Configure DNS for an alternate SSH hostname such as `altssh.gitlab.example.com`. + +| LB Port | Backend Port | Protocol | +| ------- | ------------ | -------- | +| 443 | 22 | TCP | + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Consul + +The following IPs will be used as an example: + +- `10.6.0.11`: Consul 1 +- `10.6.0.12`: Consul 2 +- `10.6.0.13`: Consul 3 + +NOTE: **Note:** +The configuration processes for the other servers in your reference architecture will +use the `/etc/gitlab/gitlab-secrets.json` file from your Consul server to connect +with the other servers. + +To configure Consul: + +1. SSH into the server that will host Consul. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['consul_role'] + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + server: true, + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Consul nodes, and + make sure you set up the correct IPs. + +NOTE: **Note:** +A Consul leader will be elected when the provisioning of the third Consul server is completed. +Viewing the Consul logs `sudo gitlab-ctl tail consul` will display +`...[INFO] consul: New leader elected: ...` + +You can list the current Consul members (server, client): + +```shell +sudo /opt/gitlab/embedded/bin/consul members +``` + +You can verify the GitLab services are running: + +```shell +sudo gitlab-ctl status +``` + +The output should be similar to the following: + +```plaintext +run: consul: (pid 30074) 76834s; run: log: (pid 29740) 76844s +run: logrotate: (pid 30925) 3041s; run: log: (pid 29649) 76861s +run: node-exporter: (pid 30093) 76833s; run: log: (pid 29663) 76855s +``` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure PostgreSQL + +In this section, you'll be guided through configuring an external PostgreSQL database +to be used with GitLab. + +### Provide your own PostgreSQL instance + +If you're hosting GitLab on a cloud provider, you can optionally use a +managed service for PostgreSQL. For example, AWS offers a managed Relational +Database Service (RDS) that runs PostgreSQL. + +If you use a cloud-managed service, or provide your own PostgreSQL: + +1. Set up PostgreSQL according to the + [database requirements document](../../install/requirements.md#database). +1. Set up a `gitlab` username with a password of your choice. The `gitlab` user + needs privileges to create the `gitlabhq_production` database. +1. Configure the GitLab application servers with the appropriate details. + This step is covered in [Configuring the GitLab Rails application](#configure-gitlab-rails). + +### Standalone PostgreSQL using Omnibus GitLab + +The following IPs will be used as an example: + +- `10.6.0.21`: PostgreSQL primary +- `10.6.0.22`: PostgreSQL secondary 1 +- `10.6.0.23`: PostgreSQL secondary 2 + +First, make sure to [install](https://about.gitlab.com/install/) +the Linux GitLab package **on each node**. Following the steps, +install the necessary dependencies from step 1, and add the +GitLab package repository from step 2. When installing GitLab +in the second step, do not supply the `EXTERNAL_URL` value. + +#### PostgreSQL primary node + +1. SSH into the PostgreSQL primary node. +1. Generate a password hash for the PostgreSQL username/password pair. This assumes you will use the default + username of `gitlab` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<postgresql_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 gitlab + ``` + +1. Generate a password hash for the PgBouncer username/password pair. This assumes you will use the default + username of `pgbouncer` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<pgbouncer_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 pgbouncer + ``` + +1. Generate a password hash for the Consul database username/password pair. This assumes you will use the default + username of `gitlab-consul` (recommended). The command will request a password + and confirmation. Use the value that is output by this command in the next + step as the value of `<consul_password_hash>`: + + ```shell + sudo gitlab-ctl pg-password-md5 gitlab-consul + ``` + +1. On the primary database node, edit `/etc/gitlab/gitlab.rb` replacing values noted in the `# START user configuration` section: + + ```ruby + # Disable all components except PostgreSQL and Repmgr and Consul + roles ['postgres_role'] + + # PostgreSQL configuration + postgresql['listen_address'] = '0.0.0.0' + postgresql['hot_standby'] = 'on' + postgresql['wal_level'] = 'replica' + postgresql['shared_preload_libraries'] = 'repmgr_funcs' + + # Disable automatic database migrations + gitlab_rails['auto_migrate'] = false + + # Configure the Consul agent + consul['services'] = %w(postgresql) + + # START user configuration + # Please set the real values as explained in Required Information section + # + # Replace PGBOUNCER_PASSWORD_HASH with a generated md5 value + postgresql['pgbouncer_user_password'] = '<pgbouncer_password_hash>' + # Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value + postgresql['sql_user_password'] = '<postgresql_password_hash>' + # Set `max_wal_senders` to one more than the number of database nodes in the cluster. + # This is used to prevent replication from using up all of the + # available database connections. + postgresql['max_wal_senders'] = 4 + postgresql['max_replication_slots'] = 4 + + # Replace XXX.XXX.XXX.XXX/YY with Network Address + postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24) + repmgr['trust_auth_cidr_addresses'] = %w(127.0.0.1/32 10.6.0.0/24) + + ## Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on for monitoring + node_exporter['listen_address'] = '0.0.0.0:9100' + postgres_exporter['listen_address'] = '0.0.0.0:9187' + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + # + # END user configuration + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### PostgreSQL secondary nodes + +1. On both the secondary nodes, add the same configuration specified above for the primary node + with an additional setting (`repmgr['master_on_initialization'] = false`) that will inform `gitlab-ctl` that they are standby nodes initially + and there's no need to attempt to register them as a primary node: + + ```ruby + # Disable all components except PostgreSQL and Repmgr and Consul + roles ['postgres_role'] + + # PostgreSQL configuration + postgresql['listen_address'] = '0.0.0.0' + postgresql['hot_standby'] = 'on' + postgresql['wal_level'] = 'replica' + postgresql['shared_preload_libraries'] = 'repmgr_funcs' + + # Disable automatic database migrations + gitlab_rails['auto_migrate'] = false + + # Configure the Consul agent + consul['services'] = %w(postgresql) + + # Specify if a node should attempt to be primary on initialization. + repmgr['master_on_initialization'] = false + + # Replace PGBOUNCER_PASSWORD_HASH with a generated md5 value + postgresql['pgbouncer_user_password'] = '<pgbouncer_password_hash>' + # Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value + postgresql['sql_user_password'] = '<postgresql_password_hash>' + # Set `max_wal_senders` to one more than the number of database nodes in the cluster. + # This is used to prevent replication from using up all of the + # available database connections. + postgresql['max_wal_senders'] = 4 + postgresql['max_replication_slots'] = 4 + + # Replace with your network addresses + postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24) + repmgr['trust_auth_cidr_addresses'] = %w(127.0.0.1/32 10.6.0.0/24) + + ## Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on for monitoring + node_exporter['listen_address'] = '0.0.0.0:9100' + postgres_exporter['listen_address'] = '0.0.0.0:9187' + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/database.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### PostgreSQL post-configuration + +SSH into the **primary node**: + +1. Open a database prompt: + + ```shell + gitlab-psql -d gitlabhq_production + ``` + +1. Make sure the `pg_trgm` extension is enabled (it might already be): + + ```shell + CREATE EXTENSION pg_trgm; + ``` + +1. Exit the database prompt by typing `\q` and Enter. + +1. Verify the cluster is initialized with one node: + + ```shell + gitlab-ctl repmgr cluster show + ``` + + The output should be similar to the following: + + ```plaintext + Role | Name | Upstream | Connection String + ----------+----------|----------|---------------------------------------- + * master | HOSTNAME | | host=HOSTNAME user=gitlab_repmgr dbname=gitlab_repmgr + ``` + +1. Note down the hostname or IP address in the connection string: `host=HOSTNAME`. We will + refer to the hostname in the next section as `<primary_node_name>`. If the value + is not an IP address, it will need to be a resolvable name (via DNS or + `/etc/hosts`) + +SSH into the **secondary node**: + +1. Set up the repmgr standby: + + ```shell + gitlab-ctl repmgr standby setup <primary_node_name> + ``` + + Do note that this will remove the existing data on the node. The command + has a wait time. + + The output should be similar to the following: + + ```console + Doing this will delete the entire contents of /var/opt/gitlab/postgresql/data + If this is not what you want, hit Ctrl-C now to exit + To skip waiting, rerun with the -w option + Sleeping for 30 seconds + Stopping the database + Removing the data + Cloning the data + Starting the database + Registering the node with the cluster + ok: run: repmgrd: (pid 19068) 0s + ``` + +Before moving on, make sure the databases are configured correctly. Run the +following command on the **primary** node to verify that replication is working +properly and the secondary nodes appear in the cluster: + +```shell +gitlab-ctl repmgr cluster show +``` + +The output should be similar to the following: + +```plaintext +Role | Name | Upstream | Connection String +----------+---------|-----------|------------------------------------------------ +* master | MASTER | | host=<primary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr + standby | STANDBY | MASTER | host=<secondary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr + standby | STANDBY | MASTER | host=<secondary_node_name> user=gitlab_repmgr dbname=gitlab_repmgr +``` + +If the 'Role' column for any node says "FAILED", check the +[Troubleshooting section](troubleshooting.md) before proceeding. + +Also, check that the `repmgr-check-master` command works successfully on each node: + +```shell +su - gitlab-consul +gitlab-ctl repmgr-check-master || echo 'This node is a standby repmgr node' +``` + +This command relies on exit codes to tell Consul whether a particular node is a master +or secondary. The most important thing here is that this command does not produce errors. +If there are errors it's most likely due to incorrect `gitlab-consul` database user permissions. +Check the [Troubleshooting section](troubleshooting.md) before proceeding. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure PgBouncer + +Now that the PostgreSQL servers are all set up, let's configure PgBouncer. +The following IPs will be used as an example: + +- `10.6.0.31`: PgBouncer 1 +- `10.6.0.32`: PgBouncer 2 +- `10.6.0.33`: PgBouncer 3 + +1. On each PgBouncer node, edit `/etc/gitlab/gitlab.rb`, and replace + `<consul_password_hash>` and `<pgbouncer_password_hash>` with the + password hashes you [set up previously](#postgresql-primary-node): + + ```ruby + # Disable all components except Pgbouncer and Consul agent + roles ['pgbouncer_role'] + + # Configure PgBouncer + pgbouncer['admin_users'] = %w(pgbouncer gitlab-consul) + + pgbouncer['users'] = { + 'gitlab-consul': { + password: '<consul_password_hash>' + }, + 'pgbouncer': { + password: '<pgbouncer_password_hash>' + } + } + + # Configure Consul agent + consul['watchers'] = %w(postgresql) + consul['enable'] = true + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + + # Enable service discovery for Prometheus + consul['monitoring_service_discovery'] = true + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + + NOTE: **Note:** + If an error `execute[generate databases.ini]` occurs, this is due to an existing + [known issue](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/4713). + It will be resolved when you run a second `reconfigure` after the next step. + +1. Create a `.pgpass` file so Consul is able to + reload PgBouncer. Enter the PgBouncer password twice when asked: + + ```shell + gitlab-ctl write-pgpass --host 127.0.0.1 --database pgbouncer --user pgbouncer --hostuser gitlab-consul + ``` + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) once again + to resolve any potential errors from the previous steps. +1. Ensure each node is talking to the current primary: + + ```shell + gitlab-ctl pgb-console # You will be prompted for PGBOUNCER_PASSWORD + ``` + +1. Once the console prompt is available, run the following queries: + + ```shell + show databases ; show clients ; + ``` + + The output should be similar to the following: + + ```plaintext + name | host | port | database | force_user | pool_size | reserve_pool | pool_mode | max_connections | current_connections + ---------------------+-------------+------+---------------------+------------+-----------+--------------+-----------+-----------------+--------------------- + gitlabhq_production | MASTER_HOST | 5432 | gitlabhq_production | | 20 | 0 | | 0 | 0 + pgbouncer | | 6432 | pgbouncer | pgbouncer | 2 | 0 | statement | 0 | 0 + (2 rows) + + type | user | database | state | addr | port | local_addr | local_port | connect_time | request_time | ptr | link | remote_pid | tls + ------+-----------+---------------------+---------+----------------+-------+------------+------------+---------------------+---------------------+-----------+------+------------+----- + C | pgbouncer | pgbouncer | active | 127.0.0.1 | 56846 | 127.0.0.1 | 6432 | 2017-08-21 18:09:59 | 2017-08-21 18:10:48 | 0x22b3880 | | 0 | + (2 rows) + ``` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +### Configure the internal load balancer + +If you're running more than one PgBouncer node as recommended, then at this time you'll need to set +up a TCP internal load balancer to serve each correctly. + +The following IP will be used as an example: + +- `10.6.0.40`: Internal Load Balancer + +Here's how you could do it with [HAProxy](https://www.haproxy.org/): + +```plaintext +global + log /dev/log local0 + log localhost local1 notice + log stdout format raw local0 + +defaults + log global + default-server inter 10s fall 3 rise 2 + balance leastconn + +frontend internal-pgbouncer-tcp-in + bind *:6432 + mode tcp + option tcplog + + default_backend pgbouncer + +backend pgbouncer + mode tcp + option tcp-check + + server pgbouncer1 10.6.0.21:6432 check + server pgbouncer2 10.6.0.22:6432 check + server pgbouncer3 10.6.0.23:6432 check +``` + +Refer to your preferred Load Balancer's documentation for further guidance. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Redis + +Using [Redis](https://redis.io/) in scalable environment is possible using a **Primary** x **Replica** +topology with a [Redis Sentinel](https://redis.io/topics/sentinel) service to watch and automatically +start the failover procedure. + +Redis requires authentication if used with Sentinel. See +[Redis Security](https://redis.io/topics/security) documentation for more +information. We recommend using a combination of a Redis password and tight +firewall rules to secure your Redis service. +You are highly encouraged to read the [Redis Sentinel](https://redis.io/topics/sentinel) documentation +before configuring Redis with GitLab to fully understand the topology and +architecture. + +The requirements for a Redis setup are the following: + +1. All Redis nodes must be able to talk to each other and accept incoming + connections over Redis (`6379`) and Sentinel (`26379`) ports (unless you + change the default ones). +1. The server that hosts the GitLab application must be able to access the + Redis nodes. +1. Protect the nodes from access from external networks + ([Internet](https://gitlab.com/gitlab-org/gitlab-foss/uploads/c4cc8cd353604bd80315f9384035ff9e/The_Internet_IT_Crowd.png)), + using a firewall. + +In this section, you'll be guided through configuring two external Redis clusters +to be used with GitLab. The following IPs will be used as an example: + +- `10.6.0.51`: Redis - Cache Primary +- `10.6.0.52`: Redis - Cache Replica 1 +- `10.6.0.53`: Redis - Cache Replica 2 +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 +- `10.6.0.61`: Redis - Queues Primary +- `10.6.0.62`: Redis - Queues Replica 1 +- `10.6.0.63`: Redis - Queues Replica 2 +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 + +NOTE: **Providing your own Redis instance:** +Managed Redis from cloud providers such as AWS ElastiCache will work. If these +services support high availability, be sure it is **not** the Redis Cluster type. +Redis version 5.0 or higher is required, as this is what ships with +Omnibus GitLab packages starting with GitLab 13.0. Older Redis versions +do not support an optional count argument to SPOP which is now required for +[Merge Trains](../../ci/merge_request_pipelines/pipelines_for_merged_results/merge_trains/index.md). +Note the Redis node's IP address or hostname, port, and password (if required). +These will be necessary when configuring the +[GitLab application servers](#configure-gitlab-rails) later. + +### Configure the Redis and Sentinel Cache cluster + +This is the section where we install and set up the new Redis Cache instances. + +NOTE: **Note:** +Redis nodes (both primary and replica) will need the same password defined in +`redis['password']`. At any time during a failover the Sentinels can +reconfigure a node and change its status from primary to replica and vice versa. + +#### Configure the primary Redis Cache node + +1. SSH into the **Primary** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_master_role' + roles ['redis_master_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.51' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # Set up password authentication for Redis (use the same password in all nodes). + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Prevent database migrations from running on upgrade + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +#### Configure the replica Redis Cache nodes + +1. SSH into the **replica** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_replica_role' + roles ['redis_replica_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.52' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # The same password for Redis authentication you set up for the primary node. + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + # The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.51' + + # Port of primary Redis server, uncomment to change to non default. Defaults + # to `6379`. + #redis['master_port'] = 6379 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Prevent database migrations from running on upgrade + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other replica nodes, and + make sure to set up the IPs correctly. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +These values don't have to be changed again in `/etc/gitlab/gitlab.rb` after +a failover, as the nodes will be managed by the [Sentinels](#configure-the-sentinel-cache-nodes), and even after a +`gitlab-ctl reconfigure`, they will get their configuration restored by +the same Sentinels. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/redis.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### Configure the Sentinel Cache nodes + +NOTE: **Note:** +If you are using an external Redis Sentinel instance, be sure +to exclude the `requirepass` parameter from the Sentinel +configuration. This parameter will cause clients to report `NOAUTH +Authentication required.`. [Redis Sentinel 3.2.x does not support +password authentication](https://github.com/antirez/redis/issues/3279). + +Now that the Redis servers are all set up, let's configure the Sentinel +servers. The following IPs will be used as an example: + +- `10.6.0.71`: Sentinel - Cache 1 +- `10.6.0.72`: Sentinel - Cache 2 +- `10.6.0.73`: Sentinel - Cache 3 + +To configure the Sentinel Cache server: + +1. SSH into the server that will host Consul/Sentinel. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['redis_sentinel_role'] + + ## Must be the same in every sentinel node + redis['master_name'] = 'gitlab-redis-cache' + + ## The same password for Redis authentication you set up for the primary node. + redis['master_password'] = 'REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER' + + ## The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.51' + + ## Define a port so Redis can listen for TCP requests which will allow other + ## machines to connect to it. + redis['port'] = 6379 + + ## Port of primary Redis server, uncomment to change to non default. Defaults + ## to `6379`. + #redis['master_port'] = 6379 + + ## Configure Sentinel's IP + sentinel['bind'] = '10.6.0.71' + + ## Port that Sentinel listens on, uncomment to change to non default. Defaults + ## to `26379`. + #sentinel['port'] = 26379 + + ## Quorum must reflect the amount of voting sentinels it take to start a failover. + ## Value must NOT be greater then the amount of sentinels. + ## + ## The quorum can be used to tune Sentinel in two ways: + ## 1. If a the quorum is set to a value smaller than the majority of Sentinels + ## we deploy, we are basically making Sentinel more sensible to primary failures, + ## triggering a failover as soon as even just a minority of Sentinels is no longer + ## able to talk with the primary. + ## 1. If a quorum is set to a value greater than the majority of Sentinels, we are + ## making Sentinel able to failover only when there are a very large number (larger + ## than majority) of well connected Sentinels which agree about the primary being down.s + sentinel['quorum'] = 2 + + ## Consider unresponsive server down after x amount of ms. + #sentinel['down_after_milliseconds'] = 10000 + + ## Specifies the failover timeout in milliseconds. It is used in many ways: + ## + ## - The time needed to re-start a failover after a previous failover was + ## already tried against the same primary by a given Sentinel, is two + ## times the failover timeout. + ## + ## - The time needed for a replica replicating to a wrong primary according + ## to a Sentinel current configuration, to be forced to replicate + ## with the right primary, is exactly the failover timeout (counting since + ## the moment a Sentinel detected the misconfiguration). + ## + ## - The time needed to cancel a failover that is already in progress but + ## did not produced any configuration change (REPLICAOF NO ONE yet not + ## acknowledged by the promoted replica). + ## + ## - The maximum time a failover in progress waits for all the replica to be + ## reconfigured as replicas of the new primary. However even after this time + ## the replicas will be reconfigured by the Sentinels anyway, but not with + ## the exact parallel-syncs progression as specified. + #sentinel['failover_timeout'] = 60000 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Consul/Sentinel nodes, and + make sure you set up the correct IPs. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +### Configure the Redis and Sentinel Queues cluster + +This is the section where we install and set up the new Redis Queues instances. + +NOTE: **Note:** +Redis nodes (both primary and replica) will need the same password defined in +`redis['password']`. At any time during a failover the Sentinels can +reconfigure a node and change its status from primary to replica and vice versa. + +#### Configure the primary Redis Queues node + +1. SSH into the **Primary** Redis server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_master_role' + roles ['redis_master_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.61' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # Set up password authentication for Redis (use the same password in all nodes). + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + ``` + +1. Only the primary GitLab application server should handle migrations. To + prevent database migrations from running on upgrade, add the following + configuration to your `/etc/gitlab/gitlab.rb` file: + + ```ruby + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +#### Configure the replica Redis Queues nodes + +1. SSH into the **replica** Redis Queue server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + and type (Community, Enterprise editions) of your current install. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + # Specify server role as 'redis_replica_role' + roles ['redis_replica_role'] + + # IP address pointing to a local IP that the other machines can reach to. + # You can also set bind to '0.0.0.0' which listen in all interfaces. + # If you really need to bind to an external accessible IP, make + # sure you add extra firewall rules to prevent unauthorized access. + redis['bind'] = '10.6.0.62' + + # Define a port so Redis can listen for TCP requests which will allow other + # machines to connect to it. + redis['port'] = 6379 + + # The same password for Redis authentication you set up for the primary node. + redis['password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + # The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.61' + + # Port of primary Redis server, uncomment to change to non default. Defaults + # to `6379`. + #redis['master_port'] = 6379 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other replica nodes, and + make sure to set up the IPs correctly. + +NOTE: **Note:** +You can specify multiple roles like sentinel and Redis as: +`roles ['redis_sentinel_role', 'redis_master_role']`. +Read more about [roles](https://docs.gitlab.com/omnibus/roles/). + +These values don't have to be changed again in `/etc/gitlab/gitlab.rb` after +a failover, as the nodes will be managed by the [Sentinels](#configure-the-sentinel-queues-nodes), and even after a +`gitlab-ctl reconfigure`, they will get their configuration restored by +the same Sentinels. + +Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/redis.html) +are supported and can be added if needed. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +#### Configure the Sentinel Queues nodes + +NOTE: **Note:** +If you are using an external Redis Sentinel instance, be sure +to exclude the `requirepass` parameter from the Sentinel +configuration. This parameter will cause clients to report `NOAUTH +Authentication required.`. [Redis Sentinel 3.2.x does not support +password authentication](https://github.com/antirez/redis/issues/3279). + +Now that the Redis servers are all set up, let's configure the Sentinel +servers. The following IPs will be used as an example: + +- `10.6.0.81`: Sentinel - Queues 1 +- `10.6.0.82`: Sentinel - Queues 2 +- `10.6.0.83`: Sentinel - Queues 3 + +To configure the Sentinel Queues server: + +1. SSH into the server that will host Sentinel. +1. [Download/install](https://about.gitlab.com/install/) the + Omnibus GitLab Enterprise Edition package using **steps 1 and 2** from the + GitLab downloads page. + - Make sure you select the correct Omnibus package, with the same version + the GitLab application is running. + - Do not complete any other steps on the download page. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + roles ['redis_sentinel_role'] + + ## Must be the same in every sentinel node + redis['master_name'] = 'gitlab-redis-persistent' + + ## The same password for Redis authentication you set up for the primary node. + redis['master_password'] = 'REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER' + + ## The IP of the primary Redis node. + redis['master_ip'] = '10.6.0.61' + + ## Define a port so Redis can listen for TCP requests which will allow other + ## machines to connect to it. + redis['port'] = 6379 + + ## Port of primary Redis server, uncomment to change to non default. Defaults + ## to `6379`. + #redis['master_port'] = 6379 + + ## Configure Sentinel's IP + sentinel['bind'] = '10.6.0.81' + + ## Port that Sentinel listens on, uncomment to change to non default. Defaults + ## to `26379`. + #sentinel['port'] = 26379 + + ## Quorum must reflect the amount of voting sentinels it take to start a failover. + ## Value must NOT be greater then the amount of sentinels. + ## + ## The quorum can be used to tune Sentinel in two ways: + ## 1. If a the quorum is set to a value smaller than the majority of Sentinels + ## we deploy, we are basically making Sentinel more sensible to primary failures, + ## triggering a failover as soon as even just a minority of Sentinels is no longer + ## able to talk with the primary. + ## 1. If a quorum is set to a value greater than the majority of Sentinels, we are + ## making Sentinel able to failover only when there are a very large number (larger + ## than majority) of well connected Sentinels which agree about the primary being down.s + sentinel['quorum'] = 2 + + ## Consider unresponsive server down after x amount of ms. + #sentinel['down_after_milliseconds'] = 10000 + + ## Specifies the failover timeout in milliseconds. It is used in many ways: + ## + ## - The time needed to re-start a failover after a previous failover was + ## already tried against the same primary by a given Sentinel, is two + ## times the failover timeout. + ## + ## - The time needed for a replica replicating to a wrong primary according + ## to a Sentinel current configuration, to be forced to replicate + ## with the right primary, is exactly the failover timeout (counting since + ## the moment a Sentinel detected the misconfiguration). + ## + ## - The time needed to cancel a failover that is already in progress but + ## did not produced any configuration change (REPLICAOF NO ONE yet not + ## acknowledged by the promoted replica). + ## + ## - The maximum time a failover in progress waits for all the replica to be + ## reconfigured as replicas of the new primary. However even after this time + ## the replicas will be reconfigured by the Sentinels anyway, but not with + ## the exact parallel-syncs progression as specified. + #sentinel['failover_timeout'] = 60000 + + ## Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + ## The IPs of the Consul server nodes + ## You can also use FQDNs and intermix them with IPs + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13), + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + redis_exporter['listen_address'] = '0.0.0.0:9121' + + # Disable auto migrations + gitlab_rails['auto_migrate'] = false + ``` + +1. To prevent database migrations from running on upgrade, run: + + ```shell + sudo touch /etc/gitlab/skip-auto-reconfigure + ``` + + Only the primary GitLab application server should handle migrations. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. +1. Go through the steps again for all the other Sentinel nodes, and + make sure you set up the correct IPs. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Gitaly + +Deploying Gitaly in its own server can benefit GitLab installations that are +larger than a single machine. + +The Gitaly node requirements are dependent on customer data, specifically the number of +projects and their repository sizes. Two nodes are recommended as an absolute minimum. +Each Gitaly node should store no more than 5TB of data and have the number of +[`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) set to 20% of available CPUs. +Additional nodes should be considered in conjunction with a review of expected +data size and spread based on the recommendations above. + +It is also strongly recommended that all Gitaly nodes be set up with SSD disks with +a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write, +as Gitaly has heavy I/O. These IOPS values are recommended only as a starter as with +time they may be adjusted higher or lower depending on the scale of your environment's workload. +If you're running the environment on a Cloud provider, you may need to refer to +their documentation on how to configure IOPS correctly. + +Some things to note: + +- The GitLab Rails application shards repositories into [repository storages](../repository_storage_paths.md). +- A Gitaly server can host one or more storages. +- A GitLab server can use one or more Gitaly servers. +- Gitaly addresses must be specified in such a way that they resolve + correctly for ALL Gitaly clients. +- Gitaly servers must not be exposed to the public internet, as Gitaly's network + traffic is unencrypted by default. The use of a firewall is highly recommended + to restrict access to the Gitaly server. Another option is to + [use TLS](#gitaly-tls-support). + +TIP: **Tip:** +For more information about Gitaly's history and network architecture see the +[standalone Gitaly documentation](../gitaly/index.md). + +Note: **Note:** +The token referred to throughout the Gitaly documentation is +just an arbitrary password selected by the administrator. It is unrelated to +tokens created for the GitLab API or other similar web API tokens. + +Below we describe how to configure two Gitaly servers, with IPs and +domain names: + +- `10.6.0.91`: Gitaly 1 (`gitaly1.internal`) +- `10.6.0.92`: Gitaly 2 (`gitaly2.internal`) + +The secret token is assumed to be `gitalysecret` and that +your GitLab installation has three repository storages: + +- `default` on Gitaly 1 +- `storage1` on Gitaly 1 +- `storage2` on Gitaly 2 + +On each node: + +1. [Download/Install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page but + **without** providing the `EXTERNAL_URL` value. +1. Edit `/etc/gitlab/gitlab.rb` to configure storage paths, enable + the network listener and configure the token: + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + + ```ruby + # /etc/gitlab/gitlab.rb + + # Gitaly and GitLab use two shared secrets for authentication, one to authenticate gRPC requests + # to Gitaly, and a second for authentication callbacks from GitLab-Shell to the GitLab internal API. + # The following two values must be the same as their respective values + # of the GitLab Rails application setup + gitaly['auth_token'] = 'gitalysecret' + gitlab_shell['secret_token'] = 'shellsecret' + + # Avoid running unnecessary services on the Gitaly server + postgresql['enable'] = false + redis['enable'] = false + nginx['enable'] = false + puma['enable'] = false + unicorn['enable'] = false + sidekiq['enable'] = false + gitlab_workhorse['enable'] = false + grafana['enable'] = false + + # If you run a seperate monitoring node you can disable these services + alertmanager['enable'] = false + prometheus['enable'] = false + + # Prevent database connections during 'gitlab-ctl reconfigure' + gitlab_rails['rake_cache_clear'] = false + gitlab_rails['auto_migrate'] = false + + # Configure the gitlab-shell API callback URL. Without this, `git push` will + # fail. This can be your 'front door' GitLab URL or an internal load + # balancer. + # Don't forget to copy `/etc/gitlab/gitlab-secrets.json` from web server to Gitaly server. + gitlab_rails['internal_api_url'] = 'https://gitlab.example.com' + + # Make Gitaly accept connections on all network interfaces. You must use + # firewalls to restrict access to this address/port. + # Comment out following line if you only want to support TLS connections + gitaly['listen_addr'] = "0.0.0.0:8075" + ``` + +1. Append the following to `/etc/gitlab/gitlab.rb` for each respective server: + 1. On `gitaly1.internal`: + + ```ruby + git_data_dirs({ + 'default' => { + 'path' => '/var/opt/gitlab/git-data' + }, + 'storage1' => { + 'path' => '/mnt/gitlab/git-data' + }, + }) + ``` + + 1. On `gitaly2.internal`: + + ```ruby + git_data_dirs({ + 'storage2' => { + 'path' => '/mnt/gitlab/git-data' + }, + }) + ``` + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). + +### Gitaly TLS support + +Gitaly supports TLS encryption. To be able to communicate +with a Gitaly instance that listens for secure connections you will need to use `tls://` URL +scheme in the `gitaly_address` of the corresponding storage entry in the GitLab configuration. + +You will need to bring your own certificates as this isn't provided automatically. +The certificate, or its certificate authority, must be installed on all Gitaly +nodes (including the Gitaly node using the certificate) and on all client nodes +that communicate with it following the procedure described in +[GitLab custom certificate configuration](https://docs.gitlab.com/omnibus/settings/ssl.html#install-custom-public-certificates). + +NOTE: **Note:** +The self-signed certificate must specify the address you use to access the +Gitaly server. If you are addressing the Gitaly server by a hostname, you can +either use the Common Name field for this, or add it as a Subject Alternative +Name. If you are addressing the Gitaly server by its IP address, you must add it +as a Subject Alternative Name to the certificate. +[gRPC does not support using an IP address as Common Name in a certificate](https://github.com/grpc/grpc/issues/2691). + +NOTE: **Note:** +It is possible to configure Gitaly servers with both an +unencrypted listening address `listen_addr` and an encrypted listening +address `tls_listen_addr` at the same time. This allows you to do a +gradual transition from unencrypted to encrypted traffic, if necessary. + +To configure Gitaly with TLS: + +1. Create the `/etc/gitlab/ssl` directory and copy your key and certificate there: + + ```shell + sudo mkdir -p /etc/gitlab/ssl + sudo chmod 755 /etc/gitlab/ssl + sudo cp key.pem cert.pem /etc/gitlab/ssl/ + sudo chmod 644 key.pem cert.pem + ``` + +1. Copy the cert to `/etc/gitlab/trusted-certs` so Gitaly will trust the cert when + calling into itself: + + ```shell + sudo cp /etc/gitlab/ssl/cert.pem /etc/gitlab/trusted-certs/ + ``` + +1. Edit `/etc/gitlab/gitlab.rb` and add: + + <!-- + updates to following example must also be made at + https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab + --> + + ```ruby + gitaly['tls_listen_addr'] = "0.0.0.0:9999" + gitaly['certificate_path'] = "/etc/gitlab/ssl/cert.pem" + gitaly['key_path'] = "/etc/gitlab/ssl/key.pem" + ``` + +1. Delete `gitaly['listen_addr']` to allow only encrypted connections. + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Sidekiq + +Sidekiq requires connections to the Redis, PostgreSQL and Gitaly instances. +The following IPs will be used as an example: + +- `10.6.0.101`: Sidekiq 1 +- `10.6.0.102`: Sidekiq 2 +- `10.6.0.103`: Sidekiq 3 +- `10.6.0.104`: Sidekiq 4 + +To configure the Sidekiq nodes, on each one: + +1. SSH into the Sidekiq server. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab package +you want using steps 1 and 2 from the GitLab downloads page. +**Do not complete any other steps on the download page.** +1. Open `/etc/gitlab/gitlab.rb` with your editor: + + ```ruby + ######################################## + ##### Services Disabled ### + ######################################## + + nginx['enable'] = false + grafana['enable'] = false + prometheus['enable'] = false + alertmanager['enable'] = false + gitaly['enable'] = false + gitlab_workhorse['enable'] = false + nginx['enable'] = false + puma['enable'] = false + postgres_exporter['enable'] = false + postgresql['enable'] = false + redis['enable'] = false + redis_exporter['enable'] = false + gitlab_exporter['enable'] = false + + ######################################## + #### Redis ### + ######################################## + + ## Redis connection details + ## First cluster that will host the cache + gitlab_rails['redis_cache_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER>@gitlab-redis-cache' + + gitlab_rails['redis_cache_sentinels'] = [ + {host: '10.6.0.71', port: 26379}, + {host: '10.6.0.72', port: 26379}, + {host: '10.6.0.73', port: 26379}, + ] + + ## Second cluster that will host the queues, shared state, and actioncable + gitlab_rails['redis_queues_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_shared_state_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_actioncable_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + + gitlab_rails['redis_queues_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_shared_state_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_actioncable_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + + ####################################### + ### Gitaly ### + ####################################### + + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage1' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' }, + }) + gitlab_rails['gitaly_token'] = 'YOUR_TOKEN' + + ####################################### + ### Postgres ### + ####################################### + gitlab_rails['db_host'] = '10.6.0.20' # internal load balancer IP + gitlab_rails['db_port'] = 6432 + gitlab_rails['db_password'] = '<postgresql_user_password>' + gitlab_rails['db_adapter'] = 'postgresql' + gitlab_rails['db_encoding'] = 'unicode' + gitlab_rails['auto_migrate'] = false + + ####################################### + ### Sidekiq configuration ### + ####################################### + sidekiq['listen_address'] = "0.0.0.0" + sidekiq['cluster'] = true # no need to set this after GitLab 13.0 + + ####################################### + ### Monitoring configuration ### + ####################################### + consul['enable'] = true + consul['monitoring_service_discovery'] = true + + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + + # Set the network addresses that the exporters will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + + # Rails Status for prometheus + gitlab_rails['monitoring_whitelist'] = ['10.6.0.121/32', '127.0.0.0/8'] + ``` + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect. + +TIP: **Tip:** +You can also run [multiple Sidekiq processes](../operations/extra_sidekiq_processes.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure GitLab Rails + +NOTE: **Note:** +In our architectures we run each GitLab Rails node using the Puma webserver +and have its number of workers set to 90% of available CPUs along with four threads. For +nodes that are running Rails with other components the worker value should be reduced +accordingly where we've found 50% achieves a good balance but this is dependent +on workload. + +This section describes how to configure the GitLab application (Rails) component. + +The following IPs will be used as an example: + +- `10.6.0.111`: GitLab application 1 +- `10.6.0.112`: GitLab application 2 +- `10.6.0.113`: GitLab application 3 + +On each node perform the following: + +1. Download/install Omnibus GitLab using **steps 1 and 2** from + [GitLab downloads](https://about.gitlab.com/install/). Do not complete other + steps on the download page. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Edit `/etc/gitlab/gitlab.rb` and use the following configuration. + To maintain uniformity of links across nodes, the `external_url` + on the application server should point to the external URL that users will use + to access GitLab. This would be the URL of the [external load balancer](#configure-the-external-load-balancer) + which will route traffic to the GitLab application server: + + ```ruby + external_url 'https://gitlab.example.com' + + # Gitaly and GitLab use two shared secrets for authentication, one to authenticate gRPC requests + # to Gitaly, and a second for authentication callbacks from GitLab-Shell to the GitLab internal API. + # The following two values must be the same as their respective values + # of the Gitaly setup + gitlab_rails['gitaly_token'] = 'gitalysecret' + gitlab_shell['secret_token'] = 'shellsecret' + + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage1' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' }, + 'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' }, + }) + + ## Disable components that will not be on the GitLab application server + roles ['application_role'] + gitaly['enable'] = false + nginx['enable'] = true + + ## PostgreSQL connection details + # Disable PostgreSQL on the application node + postgresql['enable'] = false + gitlab_rails['db_host'] = '10.6.0.20' # internal load balancer IP + gitlab_rails['db_port'] = 6432 + gitlab_rails['db_password'] = '<postgresql_user_password>' + gitlab_rails['auto_migrate'] = false + + ## Redis connection details + ## First cluster that will host the cache + gitlab_rails['redis_cache_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_FIRST_CLUSTER>@gitlab-redis-cache' + + gitlab_rails['redis_cache_sentinels'] = [ + {host: '10.6.0.71', port: 26379}, + {host: '10.6.0.72', port: 26379}, + {host: '10.6.0.73', port: 26379}, + ] + + ## Second cluster that will host the queues, shared state, and actionable + gitlab_rails['redis_queues_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_shared_state_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + gitlab_rails['redis_actioncable_instance'] = 'redis://:<REDIS_PRIMARY_PASSWORD_OF_SECOND_CLUSTER>@gitlab-redis-persistent' + + gitlab_rails['redis_queues_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_shared_state_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + gitlab_rails['redis_actioncable_sentinels'] = [ + {host: '10.6.0.81', port: 26379}, + {host: '10.6.0.82', port: 26379}, + {host: '10.6.0.83', port: 26379}, + ] + + # Set the network addresses that the exporters used for monitoring will listen on + node_exporter['listen_address'] = '0.0.0.0:9100' + gitlab_workhorse['prometheus_listen_addr'] = '0.0.0.0:9229' + sidekiq['listen_address'] = "0.0.0.0" + puma['listen'] = '0.0.0.0' + + # Add the monitoring node's IP address to the monitoring whitelist and allow it to + # scrape the NGINX metrics + gitlab_rails['monitoring_whitelist'] = ['10.6.0.121/32', '127.0.0.0/8'] + nginx['status']['options']['allow'] = ['10.6.0.121/32', '127.0.0.0/8'] + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. If you're using [Gitaly with TLS support](#gitaly-tls-support), make sure the + `git_data_dirs` entry is configured with `tls` instead of `tcp`: + + ```ruby + git_data_dirs({ + 'default' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' }, + 'storage1' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' }, + 'storage2' => { 'gitaly_address' => 'tls://gitaly2.internal:9999' }, + }) + ``` + + 1. Copy the cert into `/etc/gitlab/trusted-certs`: + + ```shell + sudo cp cert.pem /etc/gitlab/trusted-certs/ + ``` + +1. If you're [using NFS](#configure-nfs-optional): + 1. If necessary, install the NFS client utility packages using the following + commands: + + ```shell + # Ubuntu/Debian + apt-get install nfs-common + + # CentOS/Red Hat + yum install nfs-utils nfs-utils-lib + ``` + + 1. Specify the necessary NFS mounts in `/etc/fstab`. + The exact contents of `/etc/fstab` will depend on how you chose + to configure your NFS server. See the [NFS documentation](../high_availability/nfs.md) + for examples and the various options. + + 1. Create the shared directories. These may be different depending on your NFS + mount locations. + + ```shell + mkdir -p /var/opt/gitlab/.ssh /var/opt/gitlab/gitlab-rails/uploads /var/opt/gitlab/gitlab-rails/shared /var/opt/gitlab/gitlab-ci/builds /var/opt/gitlab/git-data + ``` + + 1. Edit `/etc/gitlab/gitlab.rb` and use the following configuration: + + ```ruby + ## Prevent GitLab from starting if NFS data mounts are not available + high_availability['mountpoint'] = '/var/opt/gitlab/git-data' + + ## Ensure UIDs and GIDs match between servers for permissions via NFS + user['uid'] = 9000 + user['gid'] = 9000 + web_server['uid'] = 9001 + web_server['gid'] = 9001 + registry['uid'] = 9002 + registry['gid'] = 9002 + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. Confirm the node can connect to Gitaly: + + ```shell + sudo gitlab-rake gitlab:gitaly:check + ``` + + Then, tail the logs to see the requests: + + ```shell + sudo gitlab-ctl tail gitaly + ``` + +1. Optionally, from the Gitaly servers, confirm that Gitaly can perform callbacks to the internal API: + + ```shell + sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml + ``` + +NOTE: **Note:** +When you specify `https` in the `external_url`, as in the example +above, GitLab assumes you have SSL certificates in `/etc/gitlab/ssl/`. If +certificates are not present, NGINX will fail to start. See the +[NGINX documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https) +for more information. + +### GitLab Rails post-configuration + +Initialize the GitLab database, by running the following in one of the Rails nodes: + +```shell +sudo gitlab-rake gitlab:db:configure +``` + +NOTE: **Note:** +If you encounter a `rake aborted!` error stating that PgBouncer is failing to connect to +PostgreSQL it may be that your PgBouncer node's IP address is missing from +PostgreSQL's `trust_auth_cidr_addresses` in `gitlab.rb` on your database nodes. See +[PgBouncer error `ERROR: pgbouncer cannot connect to server`](troubleshooting.md#pgbouncer-error-error-pgbouncer-cannot-connect-to-server) +in the Troubleshooting section before proceeding. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure Prometheus + +The Omnibus GitLab package can be used to configure a standalone Monitoring node +running [Prometheus](../monitoring/prometheus/index.md) and +[Grafana](../monitoring/performance/grafana_configuration.md). + +The following IP will be used as an example: + +- `10.6.0.121`: Prometheus + +To configure the Monitoring node: + +1. SSH into the Monitoring node. +1. [Download/install](https://about.gitlab.com/install/) the Omnibus GitLab + package you want using **steps 1 and 2** from the GitLab downloads page. + Do not complete any other steps on the download page. + +1. Copy the `/etc/gitlab/gitlab-secrets.json` file from your Consul server, and replace + the file of the same name on this server. If that file is not on this server, + add the file from your Consul server to this server. + +1. Edit `/etc/gitlab/gitlab.rb` and add the contents: + + ```ruby + external_url 'http://gitlab.example.com' + + # Disable all other services + gitlab_rails['auto_migrate'] = false + alertmanager['enable'] = false + gitaly['enable'] = false + gitlab_exporter['enable'] = false + gitlab_workhorse['enable'] = false + nginx['enable'] = true + postgres_exporter['enable'] = false + postgresql['enable'] = false + redis['enable'] = false + redis_exporter['enable'] = false + sidekiq['enable'] = false + puma['enable'] = false + unicorn['enable'] = false + node_exporter['enable'] = false + gitlab_exporter['enable'] = false + + # Enable Prometheus + prometheus['enable'] = true + prometheus['listen_address'] = '0.0.0.0:9090' + prometheus['monitor_kubernetes'] = false + + # Enable Login form + grafana['disable_login_form'] = false + + # Enable Grafana + grafana['enable'] = true + grafana['admin_password'] = '<grafana_password>' + + # Enable service discovery for Prometheus + consul['enable'] = true + consul['monitoring_service_discovery'] = true + consul['configuration'] = { + retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13) + } + ``` + +1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure). +1. In the GitLab UI, set `admin/application_settings/metrics_and_profiling` > Metrics - Grafana to `/-/grafana` to +`http[s]://<MONITOR NODE>/-/grafana` + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure the object storage + +GitLab supports using an object storage service for holding numerous types of data. +It's recommended over [NFS](#configure-nfs-optional) and in general it's better +in larger setups as object storage is typically much more performant, reliable, +and scalable. + +Object storage options that GitLab has tested, or is aware of customers using include: + +- SaaS/Cloud solutions such as [Amazon S3](https://aws.amazon.com/s3/), [Google cloud storage](https://cloud.google.com/storage). +- On-premises hardware and appliances from various storage vendors. +- MinIO. There is [a guide to deploying this](https://docs.gitlab.com/charts/advanced/external-object-storage/minio.html) within our Helm Chart documentation. + +For configuring GitLab to use Object Storage refer to the following guides +based on what features you intend to use: + +1. Configure [object storage for backups](../../raketasks/backup_restore.md#uploading-backups-to-a-remote-cloud-storage). +1. Configure [object storage for job artifacts](../job_artifacts.md#using-object-storage) + including [incremental logging](../job_logs.md#new-incremental-logging-architecture). +1. Configure [object storage for LFS objects](../lfs/index.md#storing-lfs-objects-in-remote-object-storage). +1. Configure [object storage for uploads](../uploads.md#using-object-storage-core-only). +1. Configure [object storage for merge request diffs](../merge_request_diffs.md#using-object-storage). +1. Configure [object storage for Container Registry](../packages/container_registry.md#use-object-storage) (optional feature). +1. Configure [object storage for Mattermost](https://docs.mattermost.com/administration/config-settings.html#file-storage) (optional feature). +1. Configure [object storage for packages](../packages/index.md#using-object-storage) (optional feature). **(PREMIUM ONLY)** +1. Configure [object storage for Dependency Proxy](../packages/dependency_proxy.md#using-object-storage) (optional feature). **(PREMIUM ONLY)** +1. Configure [object storage for Pseudonymizer](../pseudonymizer.md#configuration) (optional feature). **(ULTIMATE ONLY)** +1. Configure [object storage for autoscale Runner caching](https://docs.gitlab.com/runner/configuration/autoscale.html#distributed-runners-caching) (optional - for improved performance). +1. Configure [object storage for Terraform state files](../terraform_state.md#using-object-storage-core-only). + +Using separate buckets for each data type is the recommended approach for GitLab. + +A limitation of our configuration is that each use of object storage is separately configured. +[We have an issue for improving this](https://gitlab.com/gitlab-org/gitlab/-/issues/23345) +and easily using one bucket with separate folders is one improvement that this might bring. + +There is at least one specific issue with using the same bucket: +when GitLab is deployed with the Helm chart restore from backup +[will not properly function](https://docs.gitlab.com/charts/advanced/external-object-storage/#lfs-artifacts-uploads-packages-external-diffs-pseudonymizer) +unless separate buckets are used. + +One risk of using a single bucket would be if your organization decided to +migrate GitLab to the Helm deployment in the future. GitLab would run, but the situation with +backups might not be realized until the organization had a critical requirement for the backups to +work. + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Configure NFS (optional) + +[Object storage](#configure-the-object-storage), along with [Gitaly](#configure-gitaly) +are recommended over NFS wherever possible for improved performance. If you intend +to use GitLab Pages, this currently [requires NFS](troubleshooting.md#gitlab-pages-requires-nfs). + +See how to [configure NFS](../high_availability/nfs.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> + +## Troubleshooting + +See the [troubleshooting documentation](troubleshooting.md). + +<div align="right"> + <a type="button" class="btn btn-default" href="#setup-components"> + Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i> + </a> +</div> diff --git a/doc/administration/reference_architectures/5k_users.md b/doc/administration/reference_architectures/5k_users.md index 0b4114bca6e..14685ffa53d 100644 --- a/doc/administration/reference_architectures/5k_users.md +++ b/doc/administration/reference_architectures/5k_users.md @@ -1,49 +1,54 @@ --- reading_time: true +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers --- -# Reference architecture: up to 5,000 users +# Reference architecture: up to 5,000 users **(PREMIUM ONLY)** -This page describes GitLab reference architecture for up to 5,000 users. -For a full list of reference architectures, see +This page describes GitLab reference architecture for up to 5,000 users. For a +full list of reference architectures, see [Available reference architectures](index.md#available-reference-architectures). NOTE: **Note:** -The 5,000-user reference architecture documented below is -designed to help your organization achieve a highly-available GitLab deployment. -If you do not have the expertise or need to maintain a highly-available -environment, you can have a simpler and less costly-to-operate environment by -following the [2,000-user reference architecture](2k_users.md). +This reference architecture is designed to help your organization achieve a +highly-available GitLab deployment. If you do not have the expertise or need to +maintain a highly-available environment, you can have a simpler and less +costly-to-operate environment by using the +[2,000-user reference architecture](2k_users.md). > - **Supported users (approximate):** 5,000 -> - **High Availability:** True -> - **Test RPS rates:** API: 100 RPS, Web: 10 RPS, Git: 10 RPS - -| Service | Nodes | Configuration | GCP | AWS | Azure | -|--------------------------------------------------------------|-------|---------------------------------|-----------------|-----------------------|----------------| -| External load balancing node | 1 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Redis | 3 | 2 vCPU, 7.5GB Memory | `n1-standard-2` | `m5.large` | `D2s v3` | -| Consul + Sentinel | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| PostgreSQL | 3 | 2 vCPU, 7.5GB Memory | `n1-standard-2` | `m5.large` | `D2s v3` | -| PgBouncer | 3 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Internal load balancing node | 1 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Gitaly | 2 minimum | 8 vCPU, 30GB Memory | `n1-standard-8` | `m5.2xlarge` | `D8s v3` | -| Sidekiq | 4 | 2 vCPU, 7.5GB Memory | `n1-standard-2` | `m5.large` | `D2s v3` | -| GitLab Rails | 3 | 16 vCPU, 14.4GB Memory | `n1-highcpu-16` | `c5.4xlarge` | `F16s v2` | -| Monitoring node | 1 | 2 vCPU, 1.8GB Memory | `n1-highcpu-2` | `c5.large` | `F2s v2` | -| Object Storage | n/a | n/a | n/a | n/a | n/a | -| NFS Server (optional, not recommended) | 1 | 4 vCPU, 3.6GB Memory | `n1-highcpu-4` | `c5.xlarge` | `F4s v2` | - -The architectures were built and tested with the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) -CPU platform on GCP. On different hardware you may find that adjustments, either lower -or higher, are required for your CPU or Node counts accordingly. For more information, a -[Sysbench](https://github.com/akopytov/sysbench) benchmark of the CPU can be found -[here](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). - -For data objects such as LFS, Uploads, Artifacts, etc, an [object storage service](#configure-the-object-storage) -is recommended over NFS where possible, due to better performance and availability. -Since this doesn't require a node to be set up, it's marked as not applicable (n/a) -in the table above. +> - **High Availability:** Yes +> - **Test requests per second (RPS) rates:** API: 100 RPS, Web: 10 RPS, Git: 10 RPS + +| Service | Nodes | Configuration | GCP | AWS | Azure | +|--------------------------------------------|-------------|-------------------------|----------------|-------------|----------| +| External load balancing node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Redis | 3 | 2 vCPU, 7.5GB memory | n1-standard-2 | m5.large | D2s v3 | +| Consul + Sentinel | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| PostgreSQL | 3 | 2 vCPU, 7.5GB memory | n1-standard-2 | m5.large | D2s v3 | +| PgBouncer | 3 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Internal load balancing node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Gitaly | 2 (minimum) | 8 vCPU, 30GB memory | n1-standard-8 | m5.2xlarge | D8s v3 | +| Sidekiq | 4 | 2 vCPU, 7.5GB memory | n1-standard-2 | m5.large | D2s v3 | +| GitLab Rails | 3 | 16 vCPU, 14.4GB memory | n1-highcpu-16 | c5.4xlarge | F16s v2 | +| Monitoring node | 1 | 2 vCPU, 1.8GB memory | n1-highcpu-2 | c5.large | F2s v2 | +| Object Storage | n/a | n/a | n/a | n/a | n/a | +| NFS Server (optional, not recommended) | 1 | 4 vCPU, 3.6GB memory | n1-highcpu-4 | c5.xlarge | F4s v2 | + +The Google Cloud Platform (GCP) architectures were built and tested using the +[Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) +CPU platform. On different hardware you may find that adjustments, either lower +or higher, are required for your CPU or node counts. For more information, see +our [Sysbench](https://github.com/akopytov/sysbench)-based +[CPU benchmark](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). + +For data objects (such as LFS, Uploads, or Artifacts), an +[object storage service](#configure-the-object-storage) is recommended instead +of NFS where possible, due to better performance and availability. Since this +doesn't require a node to be set up, *Object Storage* is noted as not +applicable (n/a) in the previous table. ## Setup components @@ -1439,7 +1444,7 @@ On each node perform the following: 1. Specify the necessary NFS mounts in `/etc/fstab`. The exact contents of `/etc/fstab` will depend on how you chose - to configure your NFS server. See the [NFS documentation](../high_availability/nfs.md) + to configure your NFS server. See the [NFS documentation](../nfs.md) for examples and the various options. 1. Create the shared directories. These may be different depending on your NFS @@ -1748,7 +1753,7 @@ work. are recommended over NFS wherever possible for improved performance. If you intend to use GitLab Pages, this currently [requires NFS](troubleshooting.md#gitlab-pages-requires-nfs). -See how to [configure NFS](../high_availability/nfs.md). +See how to [configure NFS](../nfs.md). <div align="right"> <a type="button" class="btn btn-default" href="#setup-components"> diff --git a/doc/administration/reference_architectures/img/reference-architectures.png b/doc/administration/reference_architectures/img/reference-architectures.png Binary files differindex e15609e78e1..0f8e663b57b 100644 --- a/doc/administration/reference_architectures/img/reference-architectures.png +++ b/doc/administration/reference_architectures/img/reference-architectures.png diff --git a/doc/administration/reference_architectures/index.md b/doc/administration/reference_architectures/index.md index 8fde71a66bf..4f7be2413dd 100644 --- a/doc/administration/reference_architectures/index.md +++ b/doc/administration/reference_architectures/index.md @@ -1,36 +1,45 @@ --- type: reference, concepts +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers --- -# Reference architectures -<!-- TBD to be reviewed by Eric --> +# Reference architectures You can set up GitLab on a single server or scale it up to serve many users. -This page details the recommended Reference Architectures that were built and verified by GitLab's Quality and Support teams. +This page details the recommended Reference Architectures that were built and +verified by GitLab's Quality and Support teams. -Below is a chart representing each architecture tier and the number of users they can handle. As your number of users grow with time, it’s recommended that you scale GitLab accordingly. +Below is a chart representing each architecture tier and the number of users +they can handle. As your number of users grow with time, it’s recommended that +you scale GitLab accordingly.  <!-- Internal link: https://docs.google.com/spreadsheets/d/1obYP4fLKkVVDOljaI3-ozhmCiPtEeMblbBKkf2OADKs/edit#gid=1403207183 --> -Testing on these reference architectures were performed with [GitLab's Performance Tool](https://gitlab.com/gitlab-org/quality/performance) -at specific coded workloads, and the throughputs used for testing were calculated based on sample customer data. -After selecting the reference architecture that matches your scale, refer to -[Configure GitLab to Scale](#configure-gitlab-to-scale) to see the components -involved, and how to configure them. +Testing on these reference architectures were performed with +[GitLab's Performance Tool](https://gitlab.com/gitlab-org/quality/performance) +at specific coded workloads, and the throughputs used for testing were +calculated based on sample customer data. Select the +[reference architecture](#available-reference-architectures) that matches your scale. -Each endpoint type is tested with the following number of requests per second (RPS) per 1000 users: +Each endpoint type is tested with the following number of requests per second (RPS) +per 1,000 users: - API: 20 RPS - Web: 2 RPS - Git: 2 RPS -For GitLab instances with less than 2,000 users, it's recommended that you use the [default setup](#automated-backups-core-only) -by [installing GitLab](../../install/README.md) on a single machine to minimize maintenance and resource costs. +For GitLab instances with less than 2,000 users, it's recommended that you use +the [default setup](#automated-backups-core-only) by +[installing GitLab](../../install/README.md) on a single machine to minimize +maintenance and resource costs. -If your organization has more than 2,000 users, the recommendation is to scale GitLab's components to multiple -machine nodes. The machine nodes are grouped by component(s). The addition of these -nodes increases the performance and scalability of to your GitLab instance. +If your organization has more than 2,000 users, the recommendation is to scale +GitLab's components to multiple machine nodes. The machine nodes are grouped by +components. The addition of these nodes increases the performance and +scalability of to your GitLab instance. When scaling GitLab, there are several factors to consider: @@ -39,12 +48,13 @@ When scaling GitLab, there are several factors to consider: - The application nodes connects to a shared file server and PostgreSQL and Redis services on the backend. NOTE: **Note:** -Depending on your workflow, the following recommended -reference architectures may need to be adapted accordingly. Your workload -is influenced by factors including how active your users are, -how much automation you use, mirroring, and repository/change size. Additionally the -displayed memory values are provided by [GCP machine types](https://cloud.google.com/compute/docs/machine-types). -For different cloud vendors, attempt to select options that best match the provided architecture. +Depending on your workflow, the following recommended reference architectures +may need to be adapted accordingly. Your workload is influenced by factors +including how active your users are, how much automation you use, mirroring, +and repository/change size. Additionally the displayed memory values are +provided by [GCP machine types](https://cloud.google.com/compute/docs/machine-types). +For different cloud vendors, attempt to select options that best match the +provided architecture. ## Available reference architectures @@ -60,14 +70,14 @@ The following reference architectures are available: ## Availability Components -GitLab comes with the following components for your use, listed from -least to most complex: +GitLab comes with the following components for your use, listed from least to +most complex: -1. [Automated backups](#automated-backups-core-only) -1. [Traffic load balancer](#traffic-load-balancer-starter-only) -1. [Zero downtime updates](#zero-downtime-updates-starter-only) -1. [Automated database failover](#automated-database-failover-premium-only) -1. [Instance level replication with GitLab Geo](#instance-level-replication-with-gitlab-geo-premium-only) +- [Automated backups](#automated-backups-core-only) +- [Traffic load balancer](#traffic-load-balancer-starter-only) +- [Zero downtime updates](#zero-downtime-updates-starter-only) +- [Automated database failover](#automated-database-failover-premium-only) +- [Instance level replication with GitLab Geo](#instance-level-replication-with-gitlab-geo-premium-only) As you implement these components, begin with a single server and then do backups. Only after completing the first server should you proceed to the next. @@ -115,7 +125,8 @@ to the default installation: > - Supported tiers: [GitLab Starter, Premium, and Ultimate](https://about.gitlab.com/pricing/) GitLab supports [zero-downtime updates](https://docs.gitlab.com/omnibus/update/#zero-downtime-updates). -Although you can perform zero-downtime updates with a single GitLab node, the recommendation is to separate GitLab into several application nodes. +Single GitLab nodes can be updated with only a [few minutes of downtime](https://docs.gitlab.com/omnibus/update/README.html#single-node-deployment). +To avoid this, we recommend to separate GitLab into several application nodes. As long as at least one of each component is online and capable of handling the instance's usage load, your team's productivity will not be interrupted during the update. ### Automated database failover **(PREMIUM ONLY)** @@ -140,40 +151,7 @@ is recommended. instance to other geographical locations as a read-only fully operational instance that can also be promoted in case of disaster. -## Configure GitLab to scale - -NOTE: **Note:** -From GitLab 13.0, using NFS for Git repositories is deprecated. In GitLab 14.0, support for NFS for Git repositories is scheduled to be removed. Upgrade to [Gitaly Cluster](../gitaly/praefect.md) as soon as possible. - -The following components are the ones you need to configure in order to scale -GitLab. They are listed in the order you'll typically configure them if they are -required by your [reference architecture](#reference-architectures) of choice. - -Most of them are bundled in the GitLab deb/rpm package (called Omnibus GitLab), -but depending on your system architecture, you may require some components which are -not included in it. If required, those should be configured before -setting up components provided by GitLab. Advice on how to select the right -solution for your organization is provided in the configuration instructions -column. - -| Component | Description | Configuration instructions | Bundled with Omnibus GitLab | -|-----------|-------------|----------------------------| -| Load balancer(s) ([6](#footnotes)) | Handles load balancing, typically when you have multiple GitLab application services nodes | [Load balancer configuration](../high_availability/load_balancer.md) ([6](#footnotes)) | No | -| Object storage service ([4](#footnotes)) | Recommended store for shared data objects | [Object Storage configuration](../object_storage.md) | No | -| NFS ([5](#footnotes)) ([7](#footnotes)) | Shared disk storage service. Can be used as an alternative Object Storage. Required for GitLab Pages | [NFS configuration](../high_availability/nfs.md) | No | -| [Consul](../../development/architecture.md#consul) ([3](#footnotes)) | Service discovery and health checks/failover | [Consul configuration](../high_availability/consul.md) **(PREMIUM ONLY)** | Yes | -| [PostgreSQL](../../development/architecture.md#postgresql) | Database | [PostgreSQL configuration](https://docs.gitlab.com/omnibus/settings/database.html) | Yes | -| [PgBouncer](../../development/architecture.md#pgbouncer) | Database connection pooler | [PgBouncer configuration](../high_availability/pgbouncer.md#running-pgbouncer-as-part-of-a-non-ha-gitlab-installation) **(PREMIUM ONLY)** | Yes | -| Repmgr | PostgreSQL cluster management and failover | [PostgreSQL and Repmgr configuration](../postgresql/replication_and_failover.md) | Yes | -| Patroni | An alternative PostgreSQL cluster management and failover | [PostgreSQL and Patroni configuration](../postgresql/replication_and_failover.md#patroni) | Yes | -| [Redis](../../development/architecture.md#redis) ([3](#footnotes)) | Key/value store for fast data lookup and caching | [Redis configuration](../high_availability/redis.md) | Yes | -| Redis Sentinel | Redis | [Redis Sentinel configuration](../high_availability/redis.md) | Yes | -| [Gitaly](../../development/architecture.md#gitaly) ([2](#footnotes)) ([7](#footnotes)) | Provides access to Git repositories | [Gitaly configuration](../gitaly/index.md#run-gitaly-on-its-own-server) | Yes | -| [Sidekiq](../../development/architecture.md#sidekiq) | Asynchronous/background jobs | [Sidekiq configuration](../high_availability/sidekiq.md) | Yes | -| [GitLab application services](../../development/architecture.md#unicorn)([1](#footnotes)) | Puma/Unicorn, Workhorse, GitLab Shell - serves front-end requests (UI, API, Git over HTTP/SSH) | [GitLab app scaling configuration](../high_availability/gitlab.md) | Yes | -| [Prometheus](../../development/architecture.md#prometheus) and [Grafana](../../development/architecture.md#grafana) | GitLab environment monitoring | [Monitoring node for scaling](../high_availability/monitoring_node.md) | Yes | - -### Configuring select components with Cloud Native Helm +## Configuring select components with Cloud Native Helm We also provide [Helm charts](https://docs.gitlab.com/charts/) as a Cloud Native installation method for GitLab. For the reference architectures, select components can be set up in this @@ -191,50 +169,3 @@ specs, only translated into Kubernetes resources. For example, if you were to set up a 50k installation with the Rails nodes being run in Helm, then the same amount of resources as given for Omnibus should be given to the Kubernetes cluster with the Rails nodes broken down into a number of smaller Pods across that cluster. - -## Footnotes - -1. In our architectures we run each GitLab Rails node using the Puma webserver - and have its number of workers set to 90% of available CPUs along with four threads. For - nodes that are running Rails with other components the worker value should be reduced - accordingly where we've found 50% achieves a good balance but this is dependent - on workload. - -1. Gitaly node requirements are dependent on customer data, specifically the number of - projects and their sizes. We recommend that each Gitaly node should store no more than 5TB of data - and have the number of [`gitaly-ruby` workers](../gitaly/index.md#gitaly-ruby) - set to 20% of available CPUs. Additional nodes should be considered in conjunction - with a review of expected data size and spread based on the recommendations above. - -1. Recommended Redis setup differs depending on the size of the architecture. - For smaller architectures (less than 3,000 users) a single instance should suffice. - For medium sized installs (3,000 - 5,000) we suggest one Redis cluster for all - classes and that Redis Sentinel is hosted alongside Consul. - For larger architectures (10,000 users or more) we suggest running a separate - [Redis Cluster](../redis/replication_and_failover.md#running-multiple-redis-clusters) for the Cache class - and another for the Queues and Shared State classes respectively. We also recommend - that you run the Redis Sentinel clusters separately for each Redis Cluster. - -1. For data objects such as LFS, Uploads, Artifacts, etc. We recommend an [Object Storage service](../object_storage.md) - over NFS where possible, due to better performance. - -1. NFS can be used as an alternative for object storage but this isn't typically - recommended for performance reasons. Note however it is required for [GitLab - Pages](https://gitlab.com/gitlab-org/gitlab-pages/-/issues/196). - -1. Our architectures have been tested and validated with [HAProxy](https://www.haproxy.org/) - as the load balancer. Although other load balancers with similar feature sets - could also be used, those load balancers have not been validated. - -1. We strongly recommend that any Gitaly or NFS nodes be set up with SSD disks over - HDD with a throughput of at least 8,000 IOPS for read operations and 2,000 IOPS for write - as these components have heavy I/O. These IOPS values are recommended only as a starter - as with time they may be adjusted higher or lower depending on the scale of your - environment's workload. If you're running the environment on a Cloud provider - you may need to refer to their documentation on how configure IOPS correctly. - -1. The architectures were built and tested with the [Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms) - CPU platform on GCP. On different hardware you may find that adjustments, either lower - or higher, are required for your CPU or Node counts accordingly. For more information, a - [Sysbench](https://github.com/akopytov/sysbench) benchmark of the CPU can be found - [here](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks). diff --git a/doc/administration/reference_architectures/troubleshooting.md b/doc/administration/reference_architectures/troubleshooting.md index 35bdb65c810..db2e9b89ba2 100644 --- a/doc/administration/reference_architectures/troubleshooting.md +++ b/doc/administration/reference_architectures/troubleshooting.md @@ -1,3 +1,9 @@ +--- +stage: Enablement +group: Distribution +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers +--- + # Troubleshooting a reference architecture setup This page serves as the troubleshooting documentation if you followed one of @@ -17,7 +23,7 @@ with the Fog library that GitLab uses. Symptoms include: ### GitLab Pages requires NFS If you intend to use [GitLab Pages](../../user/project/pages/index.md), this currently requires -[NFS](../high_availability/nfs.md). There is [work in progress](https://gitlab.com/gitlab-org/gitlab-pages/-/issues/196) +[NFS](../nfs.md). There is [work in progress](https://gitlab.com/gitlab-org/gitlab-pages/-/issues/196) to remove this dependency. In the future, GitLab Pages may use [object storage](https://gitlab.com/gitlab-org/gitlab/-/issues/208135). @@ -524,7 +530,7 @@ To restart either service, run `gitlab-ctl restart SERVICE` For PostgreSQL, it is usually safe to restart the master node by default. Automatic failover defaults to a 1 minute timeout. Provided the database returns before then, nothing else needs to be done. To be safe, you can stop `repmgrd` on the standby nodes first with `gitlab-ctl stop repmgrd`, then start afterwards with `gitlab-ctl start repmgrd`. -On the Consul server nodes, it is important to restart the Consul service in a controlled fashion. Read our [Consul documentation](../high_availability/consul.md#restarting-the-server-cluster) for instructions on how to restart the service. +On the Consul server nodes, it is important to restart the Consul service in a controlled fashion. Read our [Consul documentation](../consul.md#restart-consul) for instructions on how to restart the service. ### `gitlab-ctl repmgr-check-master` command produces errors |
