Shell file not found inside docker compose/dockerfile containers-CodePudding

I have multiple Python scripts from which I want to run a docker container. From a related question How to run multiple Python scripts and an executable files using Docker? , I found that the best way to do that is to have run.sh a shell file as follows:

#!/bin/bash
python3 producer.py &
python3 consumer.py &
python3 test_conn.py

and then call this file from a Dockerfile as:

FROM python:3.9

RUN mkdir -p /usr/src/app

WORKDIR /usr/src/app

COPY requirements.txt /usr/src/app

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

COPY . /usr/src/app

CMD ["./run.sh"]

However, in the container logs the following error is prompting exec ./run.sh: no such file or directory, which makes no sense to me since I copied everything on the current directory, run.sh included, to /usr/src/app on my container via COPY . /usr/src/app

Please, clone my repo and on the root directory call docker-compose up -d and check myapp container logs to help me.

https://github.com/Quilograma/IES_Project

Thank you!

Can't run multiple python scripts in a single container.

CodePudding user response：

You should explicitly specify what shell interpreter be used for running your script.

Changing the last line to CMD ["bash", "-c", "./run.sh"] might solve your issue.

CodePudding user response：

If you need to run three separate long-running processes, do not try to orchestrate them from a shell script. Instead, launch three separate containers. If you're running this via Compose, this is straightforward: have three containers all running the same image, but override the command: to run different main processes.

version: '3.8'
services:
  producer:
    build: .
    command: ./producer.py
  consumer:
    build: .
    command: ./consumer.py
  test_conn:
    build: .
    command: ./test_conn.py

Make sure the scripts are executable (run chmod x producer.py on your host system, and commit that to source control) and begin with a "shebang" line #!/usr/bin/env python3 as the very first line.