如何将参数传递给 docker-compose

Question

import argparse
parser = argparse.ArgumentParser()

parser.add_argument(
    '--strat', 
    type=str, 
)
args = parser.parse_args()
strat = args.strat

I would like to right my docker-compose.yml file such as I would just pass my argument from there. I did

version: "3.3"
services:
  mm:
    container_name: mm
    stdin_open: true
    build: .
       context: .
       dockerfile: Dockerfile
       args:
           strat: 1

and my docker file

FROM python:3.10.7

COPY . .

RUN pip3 install --upgrade pip
RUN pip3 install -r requirements.txt

CMD python3 main.py

But it does not work.

Any idea what I should change pelase?

Answer 1

You need to update docker file to process the build arguments . Try something like the following:

ARG strat

# ...

CMD python3 main.py --strat=$strat

Answer 2

The args thingy is for "build time" only. If you want to run your already built image with different arguments, use environment variables or just pass them as you would with a regular binary.

like: docker compose run backend./manage.py makemigrations here you see that the ./manage.py and makemigrations are two arguments passed to backend service defined in docker-compose.yml