[Python] Using python subprocess to restart a docker container from within a different one

Here is my mc_restart.py:

result = subprocess.run(
"docker restart mc",
shell=True, # Run in a shell to handle built-ins like cd
stdout=subprocess.PIPE, # Capture standard output
stderr=subprocess.PIPE, # Capture standard error
check=True # Raise an error if the command fails
)


I have mounted docker.sock in my compose:

volumes:
- /mnt/docker/mc_docker:/mnt/docker/mc_docker
- /var/run/docker.sock:/var/run/docker.sock


And my dockerfile to create a user to run commands:

RUN apt-get update && apt-get install -y \
docker.io \
&& apt-get clean
RUN adduser --disabled-password --gecos "" myuser
RUN groupadd -f docker && usermod -aG docker myuser
WORKDIR /app
COPY . .
RUN pip install --no-cache-dir -r requirements.txt
USER myuser
ENV PYTHONUNBUFFERED=1
CMD ["python", "./mc_restart.py"]


And finally, the error I get when I run my container:

mc_restart | Error stopping docker container: permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/mc/restart": dial unix /var/run/docker.sock: connect: permission denied


I have tried running it without creating myuser and tried different commands like docker stop mc but keep running into this permission error. I know docker.io is an old installation but I'm not sure how to install the latest docker and if it would make a difference.

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