Commit e59c3f8e authored by Evan Read's avatar Evan Read

Merge branch 'ee-11073-geo-troubleshooting-fdw-docs' into 'master'

Added Geo troubleshooting instructions

See merge request gitlab-org/gitlab-ce!28491
parents 82356658 c54378d3
......@@ -23,6 +23,8 @@ to help identify if something is wrong:
![Geo health check](img/geo_node_healthcheck.png)
For information on how to resolve common errors reported from the UI, see [common errors](#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.
This rake task can be run on an app node in the **primary** or **secondary**
......@@ -40,7 +42,8 @@ Checking Geo ...
GitLab Geo is available ... yes
GitLab Geo is enabled ... yes
GitLab Geo secondary database is correctly configured ... yes
Using database streaming replication? ... yes
Database replication enabled? ... yes
Database replication working? ... yes
GitLab Geo tracking database is configured to use Foreign Data Wrapper? ... yes
GitLab Geo tracking database Foreign Data Wrapper schema is up-to-date? ... yes
GitLab Geo HTTP(S) connectivity ...
......@@ -68,22 +71,22 @@ Example output:
```
http://secondary.example.com/
-----------------------------------------------------
GitLab Version: 11.8.1-ee
GitLab Version: 11.10.4-ee
Geo Role: Secondary
Health Status: Healthy
Repositories: 190/190 (100%)
Verified Repositories: 190/190 (100%)
Wikis: 190/190 (100%)
Verified Wikis: 190/190 (100%)
LFS Objects: 35/35 (100%)
Attachments: 528/528 (100%)
CI job artifacts: 477/477 (100%)
Repositories Checked: 0/190 (0%)
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: 2158 (about 2 minute ago)
Last event ID processed by cursor: 2158 (about 2 minute ago)
Last status report was: 4 minutes ago
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
```
## Is Postgres replication working?
......@@ -455,3 +458,57 @@ reload of the FDW schema. To manually reload the FDW schema:
[database-start-replication]: database.md#step-3-initiate-the-replication-process
[database-pg-replication]: database.md#postgresql-replication
## 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, please check your volume configuration and that it has correct permissions.
### 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](database.md) were not followed correctly.
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](database.md) instructions for supported configuration.
### Geo database version (...) does not match latest migration (...)
If you are using GitLab Omnibus 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.
### Geo database is not configured to use Foreign Data Wrapper
This error means the Geo Tracking Database doesn't have the FDW server and credentials
configured.
See [How do I fix a "Foreign Data Wrapper (FDW) is not configured" error?](#how-do-i-fix-a-foreign-data-wrapper-fdw-is-not-configured-error).
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