I have a docker project running in a droplet with a Postgres Container. As the container is ephemeral and can disappear when the droplet goes away, I want to attach a persistent volume so the database is separate from the droplet. Is this the right way to go about this? I have looked for a tutorial but I can’t seem to find it.
What is the right way to approach a persistent database(like RDS on AWS) that is separate from the droplet?
The project is running Django, Caddy, and Postgres.
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Use a volume.
My docker-compose.yml:
version: '3.1'
services:
db:
image: postgres
restart: always
environment:
POSTGRES_PASSWORD: mypassword
volumes:
- ./postgres-data:/var/lib/postgresql/data
ports:
- 5432:5432
the local postgres-data/ directory will now be used by the postgres container.
mount your volume to your droplet
make a symbolic link to your volume mount:
ln -s /mnt/<volume_name> ./postgres-data
Start the postgres server:
docker-compose up -d
when you stop or down the docker container, the database will still be there. You can even destroy the droplet, you’ll still have your database on your volume.
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