Docker map an external config file

Question

I want to make an external config file via volume and pass it like:

docker run MyImage -v /home/path/my_config.conf:folder2/(is that right btw?)

But have no idea how to link this volume to the argument for the main.py...

My DocekrFile:

FROM python:3.6-jessie
MAINTAINER Vladislav Ladenkov

WORKDIR folder1/folder2

COPY folder2/requirements.txt .

RUN pip install --no-cache-dir -r requirements.txt

COPY folder2/*.py ./

?? how to link volume ??

ENTRYPOINT ["python3", "main.py", "@??volume??"]

Answer 1

You want to use a folder-name to map the volume: docker run MyImage -v /home/path/:/folder1/folder2/ So now /home/path folder on the host machine is mounted to /folder1/folder2 inside the container.

Then just pass the path of the conf file as seen within the container to the cmd. ENTRYPOINT ["python3", "main.py", "/folder1/folder2/myconf.conf"]