Multi Database PostgreSQL with PGBouncer
This Compose project will let you run multiple database within one PostgreSQL container. It's based on (Cristian Angulo)[https://dev.to/nietzscheson/multiples-postgres-databases-in-one-service-with-docker-compose-4fdf]'s post on the subject.
It also starts up a PGBouncer.
ENV file
Create a .env file with the following keys:
- HOST_IP
- HOST_KIND
- POSTGRES_PASSWORD
Host IP
I use these with Tailscale - Use this to set the IP for Postgre to bind to.
Host Kind
In the compose.yaml, you'll see postgresql.${HOST_KIND}.conf. This lets you have custom parameters for PostgreSQL per host type. Use https://pgtune.leopard.in.ua to build your own.
- CPX11 is a Hetzner host - 2 vCPUS, 2GB RAM
- Nano is a Linode host - 1 vCPU, 1GB RAM
POSTGRES_PASSWORD
Used to set the postgres user's password
Data directory
If you're using this for Cache, per SolidCache, you may be happy to use named bind mountings and let Docker manage storage.
Alternatively, bind mount a local directory for PostgreSQL to use.
Logging
This configuration will log to a mounted volume, using PostgreSQL logging, and not to Stderr / Docker logging as per the default image.
PGBouncer
Add PGBouncer accounts with:
./generate-userlist pgb_admin >> userlist.txt
Update pgbouncer.ini adding the databases defined in POSTGRES_MULTIPLE_DATABASES to the [databases] section.