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How do I copy files from a shared directory to multiple Dockerfiles?

In my application, I have 5 docker containers and each container starts with images that are built from the Dockerfile. Below is the structure:

-projectdir
  -docker
    -application1
      -Dockerfile
      -script.sh
    -application2
      -Dockerfile
      -script.sh
    -application3
      -Dockerfile
    -application4
      -Dockerfile
      -script.sh
    -application5
      -Dockerfile

script.sh is copied to Dockerfile in app 1,2 and 4. The problem is I have to put the same script.sh in every app directory. Is there a way to use a shared folder containing a single script.sh and copy from it? I am using docker-compose to build and run containers.

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2 answers


You can define a container designed to hold the script in volume (as a container for the amount of data )

scripts:
  volumes:
    - /path/to/scripts
application1:
  volumes_from:
    - scripts
application2:
  volumes_from:
    - scripts


The folder /path/to/scripts

will be used in every application.
File scripts

Dockerfile must create /path/to/scripts

and COPY script.sh

it.

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As of Docker 1.5, you can specify the path in the build context for the Dockerfile. So, the following works:

-projectdir -docker -script.sh -application1 -Dockerfile
-application2 -Dockerfile ...

You can create with:



$ cd docker $ docker build -f application1/Dockerfile .

Unfortunately I don't think you can do this with Compose, so you might have to use a separate script to create and label your images, which you can then use in Compose.

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