How can I make docker-compose build an image from a remote git repository?

Solution 1:

Are you running version 1.5.2? It looks like this was actually recently added in https://github.com/docker/compose/pull/2430. Try upgrading.

Example:

---

version: '2'

services:
  redis:
    image: "redis:3.2.3"
    hostname: redis

  redis-commander:
    build: https://github.com/joeferner/redis-commander.git
    command: --redis-host redis
    links:
      - "redis:redis"
    ports:
      - 8081

Tested with:

$ docker-compose -v
docker-compose version 1.11.2, build dfed245

Solution 2:

The file tests/unit/config/config_test.py shows:

def test_valid_url_in_build_path(self):
    valid_urls = [
        'git://github.com/docker/docker',
        '[email protected]:docker/docker.git',
        '[email protected]:atlassianlabs/atlassian-docker.git',
        'https://github.com/docker/docker.git',
        'http://github.com/docker/docker.git',
        'github.com/docker/docker.git',
    ]

This is confirmed with compose/config/config.py#L79-L85:

DOCKER_VALID_URL_PREFIXES = (
    'http://',
    'https://',
    'git://',
    'github.com/',
    'git@',
)

Solution 3:

I think there is a better way to do this now!

If you want to use a Dockerfile that's located inside the repo and the repo is public, your best guess is to use the raw file.

E.g. for the file Dockerfile_dev inside https://github.com/certbot/certbot, you could use https://raw.githubusercontent.com/certbot/certbot/master/Dockerfile-dev

Then in docker-compose, add it like this in order to use the Dockerfile from the remote location.

certbot_dev:
  image: certbot-dev
  build: https://raw.githubusercontent.com/certbot/certbot/master/Dockerfile-dev

You can find the raw link, when you click on a button called 'Raw' inside the file preview: https://github.com/certbot/certbot/blob/master/Dockerfile-dev