Deprecate single DB connection - [x] Add deprecation notice, follow https://docs.gitlab.com/ee/development/deprecation_guidelines/index.html Previously, the `config/database.yml` looked like this. It only has `main:` section: ```yaml production: main: adapter: postgresql encoding: unicode database: gitlabhq_production ... ``` With two database connections configured, the `config/database.yml` should look like: ```yaml production: main: adapter: postgresql encoding: unicode database: gitlabhq_production ... ci: adapter: postgresql encoding: unicode database: gitlabhq_production # Ensure this is the same as main's database field database_tasks: false # Ensure this is false ... ``` ### How to switch to two connections #### Omnibus 1. In `/etc/gitlab/gitlab.rb`, add the following line: ``` gitlab_rails['databases']['ci']['enable'] = true ``` 1. Run `gitlab-ctl` reconfigure 1. Run `gitlab-rake gitlab:db:validate_config` to check the config is correct. You can also check the contents of `config/database.yml` to verify it has two connections configured (see above). #### Charts 1. Configure `global.psql.ci.enable` to `true` 2. In the `toolbox` pod, run `gitlab-rake gitlab:db:validate_config` to check the config is correct. You can also check the contents of `config/database.yml` to verify it has two connections configured (see above). #### From source Edit `config/database.yml` to add the `ci:` section. You can copy most fields from `main`, except for `database_tasks` which should be set to `false`