This repo builds a docker image that accepts the same env vars as the official postgres build but with a much smaller footprint. It achieves that by basing itself off the tiny official alpine linux image.
$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
alpine-postgres latest 82d0ddb748fd About an hour ago 27.35 MB
alpine latest 70c557e50ed6 5 weeks ago 4.798 MB
percona latest 70588d0c4cd4 4 weeks ago 308.6 MB
postgres latest 6d6a71f8528e 4 weeks ago 265.1 MB$ make buildThis image is published on DockerHub as docker pull kiasaki/alpine-postgres.
Click here to see it's DockerHub homepage
This image works in the same way the official postgres docker image work.
It's documented on DockerHub in it's README: https://hub.docker.com/_/postgres/.
For example, you can start a basic PostgreSQL server, protected by a password, listening on port 5432 by running the following:
$ docker run --name some-postgres -e POSTGRES_PASSWORD=mysecretpassword -d kiasaki/alpine-postgres
Next, you can start you app's container while linking it to the PostgreSQL container you just created giving it access to it.
$ docker run --name some-app --link some-postgres:postgres -d application-that-uses-postgres
Your app will now be able to access POSTGRES_PORT_5432_TCP_ADDR and POSTGRES_PORT_5432_TCP_PORT environment variables.
MIT. See LICENSE file.