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-rw-r--r-- | doc/administration/high_availability/redis.md | 144 |
1 files changed, 37 insertions, 107 deletions
diff --git a/doc/administration/high_availability/redis.md b/doc/administration/high_availability/redis.md index 7ea49a2c22a..02ca4999cd4 100644 --- a/doc/administration/high_availability/redis.md +++ b/doc/administration/high_availability/redis.md @@ -29,22 +29,23 @@ Omnibus GitLab packages. **Table of Contents** - [Overview](#overview) - - [Prerequisites](#prerequisites) - [High Availability with Sentinel](#high-availability-with-sentinel) - [Recommended setup](#recommended-setup) - - [Available configuration setups](#available-configuration-setups) - [Redis setup overview](#redis-setup-overview) - [Sentinel setup overview](#sentinel-setup-overview) + - [Available configuration setups](#available-configuration-setups) - [Configuring Redis HA](#configuring-redis-ha) - - [Step 1. Configuring the Master Redis instance](#step-1-configuring-the-master-redis-instance) - - [Step 2. Configuring the Slave Redis instances](#step-2-configuring-the-slave-redis-instances) + - [Prerequisites](#prerequisites) + - [Step 1. Configuring the master Redis instance](#step-1-configuring-the-master-redis-instance) + - [Step 2. Configuring the slave Redis instances](#step-2-configuring-the-slave-redis-instances) - [Step 3. Configuring the Redis Sentinel instances](#step-3-configuring-the-redis-sentinel-instances) - [Step 4. Configuring the GitLab application](#step-4-configuring-the-gitlab-application) - [Switching from an existing single-machine installation to Redis HA](#switching-from-an-existing-single-machine-installation-to-redis-ha) - [Example of a minimal configuration with 1 master, 2 slaves and 3 Sentinels](#example-of-a-minimal-configuration-with-1-master-2-slaves-and-3-sentinels) - - [Configuration for Redis master](#configuration-for-redis-master) - - [Configuration for Redis slaves](#configuration-for-redis-slaves) - - [Configuration for Sentinels](#configuration-for-sentinels) + - [Example configuration for Redis master and Sentinel 1](#example-configuration-for-redis-master-and-sentinel-1) + - [Example configuration for Redis slave 1 and Sentinel 2](#example-configuration-for-redis-slave-1-and-sentinel-2) + - [Example configuration for Redis slave 2 and Sentinel 3](#example-configuration-for-redis-slave-2-and-sentinel-3) + - [Example configuration for the GitLab application](#example-configuration-for-the-gitlab-application) - [Advanced configuration](#advanced-configuration) - [Control running services](#control-running-services) - [Troubleshooting](#troubleshooting) @@ -277,7 +278,7 @@ The prerequisites for a HA Redis setup are the following: 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), using +1. Protect the nodes from access from external networks ([Internet][it]), using firewall. ### Step 1. Configuring the master Redis instance @@ -527,13 +528,13 @@ which ideally should not have Redis or Sentinels on it for a HA setup. 1. Edit `/etc/gitlab/gitlab.rb` and add/change the following lines: ``` - # Must be the same in every sentinel node + ## Must be the same in every sentinel node redis['master_name'] = 'gitlab-redis' - # The same password for Redis authentication you set up for the master node. + ## The same password for Redis authentication you set up for the master node. redis['password'] = 'redis-password-goes-here' - # A list of sentinels with `host` and `port` + ## A list of sentinels with `host` and `port` gitlab_rails['redis_sentinels'] = [ {'host' => '10.0.0.1', 'port' => 26379}, {'host' => '10.0.0.2', 'port' => 26379}, @@ -567,6 +568,11 @@ If you fail to replicate first, you may loose data (unprocessed background jobs) ## Example of a minimal configuration with 1 master, 2 slaves and 3 Sentinels +>**Note:** +Redis Sentinel is bundled with Omnibus GitLab Enterprise Edition only. For +different setups, read the +[available configuration setups](#available-configuration-setups) section. + In this example we consider that all servers have an internal network interface with IPs in the `10.0.0.x` range, and that they can connect to each other using these IPs. @@ -595,142 +601,70 @@ The same thing will happen with `sentinel.conf` that will be overridden after th initial execution, after any new sentinel node starts watching the **Master**, or a failover promotes a different **Master** node. -### Example configuration for Redis master - -**Example configation for Redis Master:** +### Example configuration for Redis master and Sentinel 1 In `/etc/gitlab/gitlab.rb`: ```ruby redis_master_role['enable'] = true - +redis_sentinel_role['enable'] = true redis['bind'] = '10.0.0.1' redis['port'] = 6379 redis['password'] = 'redis-password-goes-here' -``` - -[Reconfigure Omnibus GitLab][reconfigure] for the changes to take effect. - -### Example configuration for Redis slaves - -**Example configuration for Slave 1:** - -In `/etc/gitlab/gitlab.rb`: - -```ruby -redis_slave_role['enable'] = true - -redis['bind'] = '10.0.0.2' -redis['port'] = 6379 -redis['password'] = 'redis-password-goes-here' -redis['master_password'] = 'redis-password-goes-here' - -redis['master_ip'] = '10.0.0.1' # IP of master Redis server -#redis['master_port'] = 6379 # Port of master Redis server, uncomment to change to non default -``` - -[Reconfigure Omnibus GitLab][reconfigure] for the changes to take effect. - -**Example configuration for Slave 2:** - -In `/etc/gitlab/gitlab.rb`: - -```ruby -redis_slave_role['enable'] = true - -redis['bind'] = '10.0.0.3' -redis['port'] = 6379 -redis['password'] = 'redis-password-goes-here' -redis['master_password'] = 'redis-password-goes-here' - -redis['master_ip'] = '10.0.0.1' # IP of master Redis server -#redis['master_port'] = 6379 # Port of master Redis server, uncomment to change to non default -``` - -[Reconfigure Omnibus GitLab][reconfigure] for the changes to take effect. - -### Example configuration for Sentinels - ->**Note:** -Redis Sentinel is bundled with Omnibus GitLab Enterprise Edition only. For the -Omnibus Community Edition and installations from source, follow the -[Redis HA source install](redis_source.md) guide. - -Please note that some of the variables are already configured previously -as they are required for Redis replication. - -**Example configuration for Sentinel 1:** - -In `/etc/gitlab/gitlab.rb`: - -```ruby -redis_sentinel_role['enable'] = true - redis['master_name'] = 'gitlab-redis' # must be the same in every sentinel node redis['master_password'] = 'redis-password-goes-here' # the same value defined in redis['password'] in the master instance redis['master_ip'] = '10.0.0.1' # ip of the initial master redis instance #redis['master_port'] = 6379 # port of the initial master redis instance, uncomment to change to non default - -## Configure Sentinel sentinel['bind'] = '10.0.0.1' # sentinel['port'] = 26379 # uncomment to change default port sentinel['quorum'] = 2 - -## Consider unresponsive server down after x amount of ms. # sentinel['down_after_milliseconds'] = 10000 - # sentinel['failover_timeout'] = 60000 ``` [Reconfigure Omnibus GitLab][reconfigure] for the changes to take effect. -**Example configuration for Sentinel 2:** +### Example configuration for Redis slave 1 and Sentinel 2 In `/etc/gitlab/gitlab.rb`: ```ruby +redis_slave_role['enable'] = true redis_sentinel_role['enable'] = true - +redis['bind'] = '10.0.0.2' +redis['port'] = 6379 +redis['password'] = 'redis-password-goes-here' +redis['master_password'] = 'redis-password-goes-here' +redis['master_ip'] = '10.0.0.1' # IP of master Redis server +#redis['master_port'] = 6379 # Port of master Redis server, uncomment to change to non default redis['master_name'] = 'gitlab-redis' # must be the same in every sentinel node -redis['master_password'] = 'redis-password-goes-here' # the same value defined in redis['password'] in the master instance -redis['master_ip'] = '10.0.0.1' # ip of the initial master redis instance -#redis['master_port'] = 6379 # port of the initial master redis instance, uncomment to change to non default - -## Configure Sentinel sentinel['bind'] = '10.0.0.2' # sentinel['port'] = 26379 # uncomment to change default port - sentinel['quorum'] = 2 - -## Consider unresponsive server down after x amount of ms. # sentinel['down_after_milliseconds'] = 10000 - # sentinel['failover_timeout'] = 60000 ``` [Reconfigure Omnibus GitLab][reconfigure] for the changes to take effect. -**Example configuration for Sentinel 3:** +### Example configuration for Redis slave 2 and Sentinel 3 In `/etc/gitlab/gitlab.rb`: ```ruby +redis_slave_role['enable'] = true redis_sentinel_role['enable'] = true - +redis['bind'] = '10.0.0.3' +redis['port'] = 6379 +redis['password'] = 'redis-password-goes-here' +redis['master_password'] = 'redis-password-goes-here' +redis['master_ip'] = '10.0.0.1' # IP of master Redis server +#redis['master_port'] = 6379 # Port of master Redis server, uncomment to change to non default redis['master_name'] = 'gitlab-redis' # must be the same in every sentinel node -redis['master_password'] = 'redis-password-goes-here' # the same value defined in redis['password'] in the master instance -redis['master_ip'] = '10.0.0.1' # ip of the initial master redis instance -#redis['master_port'] = 6379 # port of the initial master redis instance, uncomment to change to non default - -## Configure Sentinel sentinel['bind'] = '10.0.0.3' # sentinel['port'] = 26379 # uncomment to change default port - sentinel['quorum'] = 2 - -## Consider unresponsive server down after x amount of ms. # sentinel['down_after_milliseconds'] = 10000 - # sentinel['failover_timeout'] = 60000 ``` @@ -740,14 +674,9 @@ sentinel['quorum'] = 2 In `/etc/gitlab/gitlab.rb`: -``` -# Must be the same in every sentinel node +```ruby redis['master_name'] = 'gitlab-redis' - -# The same password for Redis authentication you set up for the master node. redis['password'] = 'redis-password-goes-here' - -# A list of sentinels with `host` and `port` gitlab_rails['redis_sentinels'] = [ {'host' => '10.0.0.1', 'port' => 26379}, {'host' => '10.0.0.2', 'port' => 26379}, @@ -970,3 +899,4 @@ Read more on high-availability configuration: [source]: ../../install/installation.md [ce]: https://about.gitlab.com/downloads [ee]: https://about.gitlab.com/downloads-ee +[it]: https://gitlab.com/gitlab-org/gitlab-ce/uploads/c4cc8cd353604bd80315f9384035ff9e/The_Internet_IT_Crowd.png |