Docker-Patch

Patch docker images to fit your purposes and organization requirements

Installation

pip install docker-patch

Usage

Add your own patch function like this:

import docker_patch

@docker_patch.register_patcher
def patcher_func(container):
    print(f'patch container "{container}"')

    container.exec_run('/bin/sh -c \'echo "hi from module 1" >> patched.txt\'')

You can register multiple patchers, and then use it in one of these options:

cli

docker-patch <IMAGE_NAME> -m <module_name>

You can add additional -m <module> as you like and make a patchers chain that work on your image (in order of appearance). If you would like to import a module that not in your current path or installed in the interpreter libraries, you can add --add-path like this:

# assume my_patcher is in /path/to/my_patcher.py
docker-patch <IMAGE_NAME> -m my_patcher --add-path /path/to

This will add /path/to to sys.path so the patcher can import the my_module

In code

Use it directly from code

import docker
import docker_patch

# assume you registered patchers as shown above
client = docker.DockerClient()
image = client.images.get('some-image')

result_image = docker_patch.patch_image(image)