--- stage: Enablement group: Geo 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 type: howto --- # Troubleshooting Geo **(PREMIUM ONLY)** Setting up Geo requires careful attention to details and sometimes it's easy to miss a step. Here is a list of steps you should take to attempt to fix problem: - Perform [basic troubleshooting](#basic-troubleshooting). - Fix any [replication errors](#fixing-replication-errors). - Fix any [common](#fixing-common-errors) errors. ## Basic troubleshooting Before attempting more advanced troubleshooting: - Check [the health of the **secondary** node](#check-the-health-of-the-secondary-node). - Check [if PostgreSQL replication is working](#check-if-postgresql-replication-is-working). ### Check the health of the **secondary** node Visit the **primary** node's **Admin Area > Geo** (`/admin/geo/nodes`) in your browser. We perform the following health checks on each **secondary** node to help identify if something is wrong: - Is the node running? - Is the node's secondary database configured for streaming replication? - Is the node's secondary tracking database configured? - Is the node's secondary tracking database connected? - Is the node's secondary tracking database up-to-date? ![Geo health check](img/geo_node_healthcheck.png) For information on how to resolve common errors reported from the UI, see [Fixing Common Errors](#fixing-common-errors). If the UI is not working, or you are unable to log in, you can run the Geo health check manually to get this information as well as a few more details. #### Health check Rake task This Rake task can be run on an app node in the **primary** or **secondary** Geo nodes: ```shell sudo gitlab-rake gitlab:geo:check ``` Example output: ```plaintext Checking Geo ... GitLab Geo is available ... yes GitLab Geo is enabled ... yes This machine's Geo node name matches a database record ... yes, found a secondary node named "Shanghai" GitLab Geo secondary database is correctly configured ... yes Database replication enabled? ... yes Database replication working? ... yes GitLab Geo HTTP(S) connectivity ... * Can connect to the primary node ... yes HTTP/HTTPS repository cloning is enabled ... yes Machine clock is synchronized ... yes Git user has default SSH configuration? ... yes OpenSSH configured to use AuthorizedKeysCommand ... yes GitLab configured to disable writing to authorized_keys file ... yes GitLab configured to store new projects in hashed storage? ... yes All projects are in hashed storage? ... yes Checking Geo ... Finished ``` #### Sync status Rake task Current sync information can be found manually by running this Rake task on any **secondary** app node: ```shell sudo gitlab-rake geo:status ``` Example output: ```plaintext http://secondary.example.com/ ----------------------------------------------------- GitLab Version: 11.10.4-ee Geo Role: Secondary Health Status: Healthy Repositories: 289/289 (100%) Verified Repositories: 289/289 (100%) Wikis: 289/289 (100%) Verified Wikis: 289/289 (100%) LFS Objects: 8/8 (100%) Attachments: 5/5 (100%) CI job artifacts: 0/0 (0%) Repositories Checked: 0/289 (0%) Sync Settings: Full Database replication lag: 0 seconds Last event ID seen from primary: 10215 (about 2 minutes ago) Last event ID processed by cursor: 10215 (about 2 minutes ago) Last status report was: 2 minutes ago ``` ### Check if PostgreSQL replication is working To check if PostgreSQL replication is working, check if: - [Nodes are pointing to the correct database instance](#are-nodes-pointing-to-the-correct-database-instance). - [Geo can detect the current node correctly](#can-geo-detect-the-current-node-correctly). #### Are nodes pointing to the correct database instance? You should make sure your **primary** Geo node points to the instance with writing permissions. Any **secondary** nodes should point only to read-only instances. #### Can Geo detect the current node correctly? Geo finds the current machine's Geo node name in `/etc/gitlab/gitlab.rb` by: - Using the `gitlab_rails['geo_node_name']` setting. - If that is not defined, using the `external_url` setting. This name is used to look up the node with the same **Name** in **Admin Area > Geo**. To check if the current machine has a node name that matches a node in the database, run the check task: ```shell sudo gitlab-rake gitlab:geo:check ``` It displays the current machine's node name and whether the matching database record is a **primary** or **secondary** node. ```plaintext This machine's Geo node name matches a database record ... yes, found a secondary node named "Shanghai" ``` ```plaintext This machine's Geo node name matches a database record ... no Try fixing it: You could add or update a Geo node database record, setting the name to "https://example.com/". Or you could set this machine's Geo node name to match the name of an existing database record: "London", "Shanghai" For more information see: doc/administration/geo/replication/troubleshooting.md#can-geo-detect-the-current-node-correctly ``` ## Fixing errors found when running the Geo check Rake task When running this Rake task, you may see errors if the nodes are not properly configured: ```shell sudo gitlab-rake gitlab:geo:check ``` 1. Rails did not provide a password when connecting to the database ```plaintext Checking Geo ... GitLab Geo is available ... Exception: fe_sendauth: no password supplied GitLab Geo is enabled ... Exception: fe_sendauth: no password supplied ... Checking Geo ... Finished ``` - Ensure that you have the `gitlab_rails['db_password']` set to the plain text-password used when creating the hash for `postgresql['sql_user_password']`. 1. Rails is unable to connect to the database ```plaintext Checking Geo ... GitLab Geo is available ... Exception: FATAL: no pg_hba.conf entry for host "1.1.1.1", user "gitlab", database "gitlabhq_production", SSL on FATAL: no pg_hba.conf entry for host "1.1.1.1", user "gitlab", database "gitlabhq_production", SSL off GitLab Geo is enabled ... Exception: FATAL: no pg_hba.conf entry for host "1.1.1.1", user "gitlab", database "gitlabhq_production", SSL on FATAL: no pg_hba.conf entry for host "1.1.1.1", user "gitlab", database "gitlabhq_production", SSL off ... Checking Geo ... Finished ``` - Ensure that you have the IP address of the rails node included in `postgresql['md5_auth_cidr_addresses']`. - Ensure that you have included the subnet mask on the IP address: `postgresql['md5_auth_cidr_addresses'] = ['1.1.1.1/32']`. 1. Rails has supplied the incorrect password ```plaintext Checking Geo ... GitLab Geo is available ... Exception: FATAL: password authentication failed for user "gitlab" FATAL: password authentication failed for user "gitlab" GitLab Geo is enabled ... Exception: FATAL: password authentication failed for user "gitlab" FATAL: password authentication failed for user "gitlab" ... Checking Geo ... Finished ``` - Verify the correct password is set for `gitlab_rails['db_password']` that was used when creating the hash in `postgresql['sql_user_password']` by running `gitlab-ctl pg-password-md5 gitlab` and entering the password. 1. Check returns `not a secondary node` ```plaintext Checking Geo ... GitLab Geo is available ... yes GitLab Geo is enabled ... yes GitLab Geo secondary database is correctly configured ... not a secondary node Database replication enabled? ... not a secondary node ... Checking Geo ... Finished ``` - Ensure that you have added the secondary node in the Admin Area of the **primary** node. - Ensure that you entered the `external_url` or `gitlab_rails['geo_node_name']` when adding the secondary node in the admin are of the **primary** node. - Prior to GitLab 12.4, edit the secondary node in the Admin Area of the **primary** node and ensure that there is a trailing `/` in the `Name` field. 1. Check returns `Exception: PG::UndefinedTable: ERROR: relation "geo_nodes" does not exist` ```plaintext Checking Geo ... GitLab Geo is available ... no Try fixing it: Upload a new license that includes the GitLab Geo feature For more information see: https://about.gitlab.com/features/gitlab-geo/ GitLab Geo is enabled ... Exception: PG::UndefinedTable: ERROR: relation "geo_nodes" does not exist LINE 8: WHERE a.attrelid = '"geo_nodes"'::regclass ^ : SELECT a.attname, format_type(a.atttypid, a.atttypmod), pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod, c.collname, col_description(a.attrelid, a.attnum) AS comment FROM pg_attribute a LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum LEFT JOIN pg_type t ON a.atttypid = t.oid LEFT JOIN pg_collation c ON a.attcollation = c.oid AND a.attcollation <> t.typcollation WHERE a.attrelid = '"geo_nodes"'::regclass AND a.attnum > 0 AND NOT a.attisdropped ORDER BY a.attnum ... Checking Geo ... Finished ``` When performing a PostgreSQL major version (9 > 10) update this is expected. Follow: - [initiate-the-replication-process](../setup/database.md#step-3-initiate-the-replication-process) ## Fixing replication errors The following sections outline troubleshooting steps for fixing replication errors (indicated by `Database replication working? ... no` in the [`geo:check` output](#health-check-rake-task). ### Message: `ERROR: replication slots can only be used if max_replication_slots > 0`? This means that the `max_replication_slots` PostgreSQL variable needs to be set on the **primary** database. In GitLab 9.4, we have made this setting default to 1. You may need to increase this value if you have more **secondary** nodes. Be sure to restart PostgreSQL for this to take effect. See the [PostgreSQL replication setup](../setup/database.md#postgresql-replication) guide for more details. ### Message: `FATAL: could not start WAL streaming: ERROR: replication slot "geo_secondary_my_domain_com" does not exist`? This occurs when PostgreSQL does not have a replication slot for the **secondary** node by that name. You may want to rerun the [replication process](../setup/database.md) on the **secondary** node . ### Message: "Command exceeded allowed execution time" when setting up replication? This may happen while [initiating the replication process](../setup/database.md#step-3-initiate-the-replication-process) on the **secondary** node, and indicates that your initial dataset is too large to be replicated in the default timeout (30 minutes). Re-run `gitlab-ctl replicate-geo-database`, but include a larger value for `--backup-timeout`: ```shell sudo gitlab-ctl \ replicate-geo-database \ --host= \ --slot-name= \ --backup-timeout=21600 ``` This will give the initial replication up to six hours to complete, rather than the default thirty minutes. Adjust as required for your installation. ### Message: "PANIC: could not write to file `pg_xlog/xlogtemp.123`: No space left on device" Determine if you have any unused replication slots in the **primary** database. This can cause large amounts of log data to build up in `pg_xlog`. Removing the unused slots can reduce the amount of space used in the `pg_xlog`. 1. Start a PostgreSQL console session: ```shell sudo gitlab-psql ``` Note: **Note:** Using `gitlab-rails dbconsole` will not work, because managing replication slots requires superuser permissions. 1. View your replication slots with: ```sql SELECT * FROM pg_replication_slots; ``` Slots where `active` is `f` are not active. - When this slot should be active, because you have a **secondary** node configured using that slot, log in to that **secondary** node and check the PostgreSQL logs why the replication is not running. - If you are no longer using the slot (e.g. you no longer have Geo enabled), you can remove it with in the PostgreSQL console session: ```sql SELECT pg_drop_replication_slot(''); ``` ### Message: "ERROR: canceling statement due to conflict with recovery" This error may rarely occur under normal usage, and the system is resilient enough to recover. However, under certain conditions, some database queries on secondaries may run excessively long, which increases the frequency of this error. At some point, some of these queries will never be able to complete due to being canceled every time. These long-running queries are [planned to be removed in the future](https://gitlab.com/gitlab-org/gitlab/-/issues/34269), but as a workaround, we recommend enabling [hot_standby_feedback](https://www.postgresql.org/docs/10/hot-standby.html#HOT-STANDBY-CONFLICT). This increases the likelihood of bloat on the **primary** node as it prevents `VACUUM` from removing recently-dead rows. However, it has been used successfully in production on GitLab.com. To enable `hot_standby_feedback`, add the following to `/etc/gitlab/gitlab.rb` on the **secondary** node: ```ruby postgresql['hot_standby_feedback'] = 'on' ``` Then reconfigure GitLab: ```shell sudo gitlab-ctl reconfigure ``` To help us resolve this problem, consider commenting on [the issue](https://gitlab.com/gitlab-org/gitlab/-/issues/4489). ### Message: `LOG: invalid CIDR mask in address` This happens on wrongly-formatted addresses in `postgresql['md5_auth_cidr_addresses']`. ```plaintext 2020-03-20_23:59:57.60499 LOG: invalid CIDR mask in address "***" 2020-03-20_23:59:57.60501 CONTEXT: line 74 of configuration file "/var/opt/gitlab/postgresql/data/pg_hba.conf" ``` To fix this, update the IP addresses in `/etc/gitlab/gitlab.rb` under `postgresql['md5_auth_cidr_addresses']` to respect the CIDR format (i.e. `1.2.3.4/32`). ### Message: `LOG: invalid IP mask "md5": Name or service not known` This happens when you have added IP addresses without a subnet mask in `postgresql['md5_auth_cidr_addresses']`. ```plaintext 2020-03-21_00:23:01.97353 LOG: invalid IP mask "md5": Name or service not known 2020-03-21_00:23:01.97354 CONTEXT: line 75 of configuration file "/var/opt/gitlab/postgresql/data/pg_hba.conf" ``` To fix this, add the subnet mask in `/etc/gitlab/gitlab.rb` under `postgresql['md5_auth_cidr_addresses']` to respect the CIDR format (i.e. `1.2.3.4/32`). ### Message: `Found data in the gitlabhq_production database!` when running `gitlab-ctl replicate-geo-database` This happens if data is detected in the `projects` table. When one or more projects are detected, the operation is aborted to prevent accidental data loss. To bypass this message, pass the `--force` option to the command. In GitLab 13.4, a seed project is added when GitLab is first installed. This makes it necessary to pass `--force` even on a new Geo secondary node. There is an [issue to account for seed projects](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5618) when checking the database. ### Very large repositories never successfully synchronize on the **secondary** node GitLab places a timeout on all repository clones, including project imports and Geo synchronization operations. If a fresh `git clone` of a repository on the **primary** takes more than the default three hours, you may be affected by this. To increase the timeout, add the following line to `/etc/gitlab/gitlab.rb` on the **secondary** node: ```ruby gitlab_rails['gitlab_shell_git_timeout'] = 14400 ``` Then reconfigure GitLab: ```shell sudo gitlab-ctl reconfigure ``` This will increase the timeout to four hours (14400 seconds). Choose a time long enough to accommodate a full clone of your largest repositories. ### New LFS objects are never replicated If new LFS objects are never replicated to secondary Geo nodes, check the version of GitLab you are running. GitLab versions 11.11.x or 12.0.x are affected by [a bug that results in new LFS objects not being replicated to Geo secondary nodes](https://gitlab.com/gitlab-org/gitlab/-/issues/32696). To resolve the issue, upgrade to GitLab 12.1 or newer. ### Resetting Geo **secondary** node replication If you get a **secondary** node in a broken state and want to reset the replication state, to start again from scratch, there are a few steps that can help you: 1. Stop Sidekiq and the Geo LogCursor It's possible to make Sidekiq stop gracefully, but making it stop getting new jobs and wait until the current jobs to finish processing. You need to send a **SIGTSTP** kill signal for the first phase and them a **SIGTERM** when all jobs have finished. Otherwise just use the `gitlab-ctl stop` commands. ```shell gitlab-ctl status sidekiq # run: sidekiq: (pid 10180) <- this is the PID you will use kill -TSTP 10180 # change to the correct PID gitlab-ctl stop sidekiq gitlab-ctl stop geo-logcursor ``` You can watch Sidekiq logs to know when Sidekiq jobs processing have finished: ```shell gitlab-ctl tail sidekiq ``` 1. Rename repository storage folders and create new ones. If you are not concerned about possible orphaned directories and files, then you can simply skip this step. ```shell mv /var/opt/gitlab/git-data/repositories /var/opt/gitlab/git-data/repositories.old mkdir -p /var/opt/gitlab/git-data/repositories chown git:git /var/opt/gitlab/git-data/repositories ``` TIP: **Tip:** You may want to remove the `/var/opt/gitlab/git-data/repositories.old` in the future as soon as you confirmed that you don't need it anymore, to save disk space. 1. _(Optional)_ Rename other data folders and create new ones CAUTION: **Caution:** You may still have files on the **secondary** node that have been removed from **primary** node but removal have not been reflected. If you skip this step, they will never be removed from this Geo node. Any uploaded content like file attachments, avatars or LFS objects are stored in a subfolder in one of the two paths below: - `/var/opt/gitlab/gitlab-rails/shared` - `/var/opt/gitlab/gitlab-rails/uploads` To rename all of them: ```shell gitlab-ctl stop mv /var/opt/gitlab/gitlab-rails/shared /var/opt/gitlab/gitlab-rails/shared.old mkdir -p /var/opt/gitlab/gitlab-rails/shared mv /var/opt/gitlab/gitlab-rails/uploads /var/opt/gitlab/gitlab-rails/uploads.old mkdir -p /var/opt/gitlab/gitlab-rails/uploads gitlab-ctl start geo-postgresql ``` Reconfigure to recreate the folders and make sure permissions and ownership are correct: ```shell gitlab-ctl reconfigure ``` 1. Reset the Tracking Database ```shell gitlab-rake geo:db:drop # on a secondary app node gitlab-ctl reconfigure # on the tracking database node gitlab-rake geo:db:setup # on a secondary app node ``` 1. Restart previously stopped services ```shell gitlab-ctl start ``` ## Fixing errors during a PostgreSQL upgrade or downgrade ### Message: `ERROR: psql: FATAL: role "gitlab-consul" does not exist` When [upgrading PostgreSQL on a Geo instance](https://docs.gitlab.com/omnibus/settings/database.html#upgrading-a-geo-instance), you might encounter the following error: ```plaintext $ sudo gitlab-ctl pg-upgrade --target-version=11 Checking for an omnibus managed postgresql: OK Checking if postgresql['version'] is set: OK Checking if we already upgraded: NOT OK Checking for a newer version of PostgreSQL to install Upgrading PostgreSQL to 11.7 Checking if PostgreSQL bin files are symlinked to the expected location: OK Waiting 30 seconds to ensure tasks complete before PostgreSQL upgrade. See https://docs.gitlab.com/omnibus/settings/database.html#upgrade-packaged-postgresql-server for details If you do not want to upgrade the PostgreSQL server at this time, enter Ctrl-C and see the documentation for details Please hit Ctrl-C now if you want to cancel the operation. ..............................Detected an HA cluster. Error running command: /opt/gitlab/embedded/bin/psql -qt -d gitlab_repmgr -h /var/opt/gitlab/postgresql -p 5432 -c "SELECT name FROM repmgr_gitlab_cluster.repl_nodes WHERE type='master' AND active != 'f'" -U gitlab-consul ERROR: psql: FATAL: role "gitlab-consul" does not exist Traceback (most recent call last): 10: from /opt/gitlab/embedded/bin/omnibus-ctl:23:in `
' 9: from /opt/gitlab/embedded/bin/omnibus-ctl:23:in `load' 8: from /opt/gitlab/embedded/lib/ruby/gems/2.6.0/gems/omnibus-ctl-0.6.0/bin/omnibus-ctl:31:in `' 7: from /opt/gitlab/embedded/lib/ruby/gems/2.6.0/gems/omnibus-ctl-0.6.0/lib/omnibus-ctl.rb:746:in `run' 6: from /opt/gitlab/embedded/lib/ruby/gems/2.6.0/gems/omnibus-ctl-0.6.0/lib/omnibus-ctl.rb:204:in `block in add_command_under_category' 5: from /opt/gitlab/embedded/service/omnibus-ctl/pg-upgrade.rb:171:in `block in load_file' 4: from /opt/gitlab/embedded/service/omnibus-ctl-ee/lib/repmgr.rb:248:in `is_master?' 3: from /opt/gitlab/embedded/service/omnibus-ctl-ee/lib/repmgr.rb:100:in `execute_psql' 2: from /opt/gitlab/embedded/service/omnibus-ctl-ee/lib/repmgr.rb:113:in `cmd' 1: from /opt/gitlab/embedded/lib/ruby/gems/2.6.0/gems/mixlib-shellout-3.0.9/lib/mixlib/shellout.rb:287:in `error!' /opt/gitlab/embedded/lib/ruby/gems/2.6.0/gems/mixlib-shellout-3.0.9/lib/mixlib/shellout.rb:300:in `invalid!': Expected process to exit with [0], but received '2' (Mixlib::ShellOut::ShellCommandFailed) ---- Begin output of /opt/gitlab/embedded/bin/psql -qt -d gitlab_repmgr -h /var/opt/gitlab/postgresql -p 5432 -c "SELECT name FROM repmgr_gitlab_cluster.repl_nodes WHERE type='master' AND active != 'f'" -U gitlab-consul ---- STDOUT: STDERR: psql: FATAL: role "gitlab-consul" does not exist ---- End output of /opt/gitlab/embedded/bin/psql -qt -d gitlab_repmgr -h /var/opt/gitlab/postgresql -p 5432 -c "SELECT name FROM repmgr_gitlab_cluster.repl_nodes WHERE type='master' AND active != 'f'" -U gitlab-consul ---- Ran /opt/gitlab/embedded/bin/psql -qt -d gitlab_repmgr -h /var/opt/gitlab/postgresql -p 5432 -c "SELECT name FROM repmgr_gitlab_cluster.repl_nodes WHERE type='master' AND active != 'f'" -U gitlab-consul returned 2 ``` If you are upgrading the PostgreSQL read-replica of a Geo secondary node, and you are not using `consul` or `repmgr`, you may need to disable `consul` and/or `repmgr` services in `gitlab.rb`: ```ruby consul['enable'] = false repmgr['enable'] = false ``` Then reconfigure GitLab: ```shell sudo gitlab-ctl reconfigure ``` ## Fixing errors during a failover or when promoting a secondary to a primary node The following are possible errors that might be encountered during failover or when promoting a secondary to a primary node with strategies to resolve them. ### Message: ActiveRecord::RecordInvalid: Validation failed: Name has already been taken When [promoting a **secondary** node](../disaster_recovery/index.md#step-3-promoting-a-secondary-node), you might encounter the following error: ```plaintext Running gitlab-rake geo:set_secondary_as_primary... rake aborted! ActiveRecord::RecordInvalid: Validation failed: Name has already been taken /opt/gitlab/embedded/service/gitlab-rails/ee/lib/tasks/geo.rake:236:in `block (3 levels) in ' /opt/gitlab/embedded/service/gitlab-rails/ee/lib/tasks/geo.rake:221:in `block (2 levels) in ' /opt/gitlab/embedded/bin/bundle:23:in `load' /opt/gitlab/embedded/bin/bundle:23:in `
' Tasks: TOP => geo:set_secondary_as_primary (See full trace by running task with --trace) You successfully promoted this node! ``` If you encounter this message when running `gitlab-rake geo:set_secondary_as_primary` or `gitlab-ctl promote-to-primary-node`, either: - Enter a Rails console and run: ```ruby Rails.application.load_tasks; nil Gitlab::Geo.expire_cache! Rake::Task['geo:set_secondary_as_primary'].invoke ``` - Upgrade to GitLab 12.6.3 or newer if it is safe to do so. For example, if the failover was just a test. A [caching-related bug](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/22021) was fixed. ### Message: ActiveRecord::RecordInvalid: Validation failed: Enabled Geo primary node cannot be disabled If you disabled a secondary node, either with the [replication pause task](../index.md#pausing-and-resuming-replication) (13.2) or by using the user interface (13.1 and earlier), you must first re-enable the node before you can continue. This is fixed in 13.4. Run the following command, replacing `https:///` with the URL for your secondary server, using either `http` or `https`, and ensuring that you end the URL with a slash (`/`): ```shell sudo gitlab-rails dbconsole UPDATE geo_nodes SET enabled = true WHERE url = 'https:///' AND enabled = false;" ``` This should update 1 row. ### Message: ``NoMethodError: undefined method `secondary?' for nil:NilClass`` When [promoting a **secondary** node](../disaster_recovery/index.md#step-3-promoting-a-secondary-node), you might encounter the following error: ```plaintext sudo gitlab-rake geo:set_secondary_as_primary rake aborted! NoMethodError: undefined method `secondary?' for nil:NilClass /opt/gitlab/embedded/service/gitlab-rails/ee/lib/tasks/geo.rake:232:in `block (3 levels) in ' /opt/gitlab/embedded/service/gitlab-rails/ee/lib/tasks/geo.rake:221:in `block (2 levels) in ' /opt/gitlab/embedded/bin/bundle:23:in `load' /opt/gitlab/embedded/bin/bundle:23:in `
' Tasks: TOP => geo:set_secondary_as_primary (See full trace by running task with --trace) ``` This command is intended to be executed on a secondary node only, and this error is displayed if you attempt to run this command on a primary node. ### Message: `sudo: gitlab-pg-ctl: command not found` When [promoting a **secondary** node with multiple servers](../disaster_recovery/index.md#promoting-a-secondary-node-with-multiple-servers), you need to run the `gitlab-pg-ctl` command to promote the PostgreSQL read-replica database. In GitLab 12.8 and earlier, this command will fail with the message: ```plaintext sudo: gitlab-pg-ctl: command not found ``` In this case, the workaround is to use the full path to the binary, for example: ```shell sudo /opt/gitlab/embedded/bin/gitlab-pg-ctl promote ``` GitLab 12.9 and later are [unaffected by this error](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5147). ### Two-factor authentication is broken after a failover The setup instructions for Geo prior to 10.5 failed to replicate the `otp_key_base` secret, which is used to encrypt the two-factor authentication secrets stored in the database. If it differs between **primary** and **secondary** nodes, users with two-factor authentication enabled won't be able to log in after a failover. If you still have access to the old **primary** node, you can follow the instructions in the [Upgrading to GitLab 10.5](../replication/version_specific_updates.md#updating-to-gitlab-105) section to resolve the error. Otherwise, the secret is lost and you'll need to [reset two-factor authentication for all users](../../../security/two_factor_authentication.md#disabling-2fa-for-everyone). ## Expired artifacts If you notice for some reason there are more artifacts on the Geo secondary node than on the Geo primary node, you can use the Rake task to [cleanup orphan artifact files](../../../raketasks/cleanup.md#remove-orphan-artifact-files). On a Geo **secondary** node, this command will also clean up all Geo registry record related to the orphan files on disk. ## Fixing sign in errors ### Message: The redirect URI included is not valid If you are able to log in to the **primary** node, but you receive this error when attempting to log into a **secondary**, you should check that the Geo node's URL matches its external URL. 1. On the primary, visit **Admin Area > Geo**. 1. Find the affected **secondary** and click **Edit**. 1. Ensure the **URL** field matches the value found in `/etc/gitlab/gitlab.rb` in `external_url "https://gitlab.example.com"` on the frontend server(s) of the **secondary** node. ## Fixing common errors This section documents common errors reported in the Admin UI and how to fix them. ### Geo database configuration file is missing GitLab cannot find or doesn't have permission to access the `database_geo.yml` configuration file. In an Omnibus GitLab installation, the file should be in `/var/opt/gitlab/gitlab-rails/etc`. If it doesn't exist or inadvertent changes have been made to it, run `sudo gitlab-ctl reconfigure` to restore it to its correct state. If this path is mounted on a remote volume, ensure your volume configuration has the correct permissions. ### An existing tracking database cannot be reused Geo cannot reuse an existing tracking database. It is safest to use a fresh secondary, or reset the whole secondary by following [Resetting Geo secondary node replication](#resetting-geo-secondary-node-replication). ### Geo node has a database that is writable which is an indication it is not configured for replication with the primary node This error refers to a problem with the database replica on a **secondary** node, which Geo expects to have access to. It usually means, either: - An unsupported replication method was used (for example, logical replication). - The instructions to setup a [Geo database replication](../setup/database.md) were not followed correctly. - Your database connection details are incorrect, that is you have specified the wrong user in your `/etc/gitlab/gitlab.rb` file. A common source of confusion with **secondary** nodes is that it requires two separate PostgreSQL instances: - A read-only replica of the **primary** node. - A regular, writable instance that holds replication metadata. That is, the Geo tracking database. ### Geo node does not appear to be replicating the database from the primary node The most common problems that prevent the database from replicating correctly are: - **Secondary** nodes cannot reach the **primary** node. Check credentials, firewall rules, etc. - SSL certificate problems. Make sure you copied `/etc/gitlab/gitlab-secrets.json` from the **primary** node. - Database storage disk is full. - Database replication slot is misconfigured. - Database is not using a replication slot or another alternative and cannot catch-up because WAL files were purged. Make sure you follow the [Geo database replication](../setup/database.md) instructions for supported configuration. ### Geo database version (...) does not match latest migration (...) If you are using Omnibus GitLab installation, something might have failed during upgrade. You can: - Run `sudo gitlab-ctl reconfigure`. - Manually trigger the database migration by running: `sudo gitlab-rake geo:db:migrate` as root on the **secondary** node. ### GitLab indicates that more than 100% of repositories were synced This can be caused by orphaned records in the project registry. You can clear them [using a Rake task](../../../administration/raketasks/geo.md#remove-orphaned-project-registries). ### Geo Admin Area returns 404 error for a secondary node Sometimes `sudo gitlab-rake gitlab:geo:check` indicates that the **secondary** node is healthy, but a 404 error for the **secondary** node is returned in the Geo Admin Area on the **primary** node. To resolve this issue: - Try restarting the **secondary** using `sudo gitlab-ctl restart`. - Check `/var/log/gitlab/gitlab-rails/geo.log` to see if the **secondary** node is using IPv6 to send its status to the **primary** node. If it is, add an entry to the **primary** node using IPv4 in the `/etc/hosts` file. Alternatively, you should [enable IPv6 on the **primary** node](https://docs.gitlab.com/omnibus/settings/nginx.html#setting-the-nginx-listen-address-or-addresses). ## Fixing client errors ### Authorization errors from LFS HTTP(s) client requests You may have problems if you're running a version of [Git LFS](https://git-lfs.github.com/) before 2.4.2. As noted in [this authentication issue](https://github.com/git-lfs/git-lfs/issues/3025), requests redirected from the secondary to the primary node do not properly send the Authorization header. This may result in either an infinite `Authorization <-> Redirect` loop, or Authorization errors.