Docker Compose build context from git repository with Dockerfile inside folder

Question

I would like to build a new image in my docker compose project using a git repository as I need to change some ARG vars.

My concern is that the Dockerfile is inside a folder of the git repository.

How can be specified a folder as build context using a git repository?

Repository: https://github.com/wodby/drupal-php/blob/master/7/Dockerfile

version: "2"
services:
  php:
    build:
      context: https://github.com/wodby/drupal-php.git
      dockerfile: 7/Dockerfile
      args:
         - BASE_IMAGE_TAG=7.1
         - WODBY_USER_ID=117
         - WODBY_GROUP_ID=111
      volumes:
          - ./:/var/www/html

I've tried the dockerfile property: "FOLDER/" + Dockerfile

But the repository uses relative paths, and it doesn't find dependencies:

 ---> 6cc2006e9102
Step 7/9 : COPY templates /etc/gotpl/
ERROR: Service 'phpe' failed to build: COPY failed: stat /var/lib/docker/tmp/docker-builder740707850/templates: no such file or directory

Could be related: May 2022, see "Build docker image using different directory contexts": Dockerfiles now support multiple build contexts. — VonC
– VonC, Commented Jul 22, 2022 at 18:45
@VonC Does docker build context from git url also copies git folder in the container ? — power-cut
– power-cut, Commented Mar 9, 2023 at 4:43
@power-cut No, what ends up in the container is only what you ADD or COPY from your Dockerfile. — VonC
– VonC, Commented Mar 9, 2023 at 12:21
@VonC Can you have a look at this question ? stackoverflow.com/questions/75680792/… — power-cut
– power-cut, Commented Mar 9, 2023 at 18:56

jorgetutor · Accepted Answer · 2018-05-21 17:42:19Z

17

It should be this way: myrepo.git#:myfolder

version: "2"
services:
  php:
    build:
      context: https://github.com/wodby/drupal-php.git#:7
      args:
         - BASE_IMAGE_TAG=7.1
         - WODBY_USER_ID=117
         - WODBY_GROUP_ID=111
      volumes:
          - ./:/var/www/html

https://docs.docker.com/engine/reference/commandline/build/#git-repositories

answered May 21, 2018 at 17:42

jorgetutor

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1 Comment

marvin_x Over a year ago

For private repositories: Use https://${TOKEN}:@github.company.com/org/repo.git with TOKEN in gitignored .env file to protect the token. Source: docker-compose-issue-3038 as mentioned by both @Dorin and @David in [stackoverflow] (stackoverflow.com/questions/56458434/…), and [docker-compose:environment-variables] (docs.docker.com/compose/environment-variables)

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