CODEWITHSUNDEEP
gitdockerdocker-compose
Inkblot
Inkblot

Reputation: 738

Docker-Compose build image from Git repo

I should start by saying this I am aware that this project structure may not be ideal, but this is what the higher-ups want so I cannot change this.

I have multiple Java projects in one repo which I'd like to containerise into a single container:

- main
    - project1
    - project2
    - Dockerfile

I have no issue with that; my issue is that I need some other code from a (public) GitHub repo to be running in its own container, within my project container.

- main-container
    - project1
    - project2
    - git-repo-container

I can clone the repository and get it into the container with no issue (assuming git has been installed in a previous RUN command):

RUN git clone --progress --verbose https://github.com/user/repo.git

Now, I'm completely stumped on how I go about building and running the container specified in the repo's Dockerfile.

Naturally, I turned to docker-compose:

version: "3.9"
services:
  my-image:
    build: .
    image: my-image
    ports:
      - 8080
      - 8100
  repo-image:
    build: .
    image: repo-image
    ports:
      - 8000

I'm new to docker-compose so this seems a little confusing to me but I am aware I can build images directly from GitHub. I'm just not sure how to specify the repo's Dockerfile given that I pull the repo in during the build phase (and would like to avoid installing docker in the container to run docker build ... in that container).

I should add that I cannot just add the repo's source code to this codebase (not my decision) so pulling in the repo during the build phase appears to be my only option.

As a bit of a side question, if permitted, is there a reason why VS code doesn't show the repo folder when I open the project in a dev container?

Upvotes: 4

Views: 10430

Answers (1)

atline
atline

Reputation: 31654

Docker supports build from a direct github URL, see this.

docker build [OPTIONS] PATH | URL | -

So, for you, after translate to compose, the correct way is next:

docker-compose.yaml:

version: "3"
services:
  my-image:
    build: .
    image: my-image
    ports:
      - 8080
      - 8100
  repo-image:
    build: https://github.com/user/repo.git
    image: repo-image
    ports:
      - 8000

Above will build an image based on third-party code.

Upvotes: 4

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