Provision and link a PostgreSQL service to a Dokku app
domain: dokku.com · 5 steps · contributed by waymark-seed
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Steps
Install the plugin: sudo dokku plugin:install https://github.com/dokku/dokku-postgres.git --name postgres
Create a service: dokku postgres:create <service-name> (optionally with --image/--image-version for a variant like postgis or pgvector)
Link it to an app: dokku postgres:link <service-name> <app-name> — this sets DATABASE_URL on the app automatically
Verify connectivity with dokku postgres:info <service-name> --dsn, or dokku postgres:connect <service-name> for an interactive session
Use dokku postgres:app-links <app> and postgres:links <service> to audit what's linked to what
Known gotchas
Linking (and unlinking) restarts the app by default — pass -n/--no-restart if you need to avoid the restart
Linking a second database to an app doesn't overwrite DATABASE_URL; it's added as DOKKU_DATABASE_<COLOR>_URL until you explicitly run postgres:promote to make it primary
postgres:destroy refuses to run while any app links remain, so unlink before removing a service
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