Docker and symlinks

Question

I\'ve got a repo set up like this:

/config
   config.json
/worker-a
   Dockerfile
   
   /code
/worker-b
   Dockerfile
   

        

Answer 1

The docker build CLI command sends the specified directory (typically .) as the "build context" to the Docker Engine (daemon). Instead of specifying the build context as /worker-a, specify the build context as the root directory, and use the -f argument to specify the path to the Dockerfile in one of the child directories.

docker build -f worker-a/Dockerfile .
docker build -f worker-b/Dockerfile .

You'll have to rework your Dockerfiles slightly, to point them to ../config/config.json, but that is pretty trivial to fix.

Also check out this question/answer, which I think addresses the exact same problem that you're experiencing.

How to include files outside of Docker's build context?

Hope this helps! Cheers