I have a project and ı need to run 2 script when ı run mu Docker Image. Two of them this script has infinite loop. So none of them will stop.

I tried the use:

CMD ["python3", "main.py", "btcusdt"] 
CMD ["python3", "Flask_API/api_main.py"]

But ı discovered only last line of CDM is working.

Is there any way to do this ? Or should ı split my code and create 2 Docker Image ?

Thank you for time.

Here is my current not working Dockerfile:

FROM python:3.8

COPY requirements.txt requirements.txt


RUN pip install -r requirements.txt
COPY . .


CMD ["python3", "main.py", "btcusdt"]
CMD ["python3", "Flask_API/api_main.py"]

CodePudding user response：

There can be only one CMD instruction in the dockerfile if there is more than one, the last one will override the previous CMD instructions.

The better way I think is to create separate docker containers and talk to each other. here is a tutorial to do that : how to communicate between docker containers

But if you really need to run both scripts in a single container,

Here is the way

• Create a bash script inside your project and include both bash commands in the script, here is an example.

#!/bin/bash

exec python3  main.py btcusdt &
exec python3 Flask_API/api_main.py

• Add COPY instruction to Dockerfile to copy our bash script to the container and allow executable permission via RUN instruction.

COPY script.sh ./
RUN chmod a x script.sh

• Now replace the previous two CMD instructions with one to execute our bash script.

CMD ["./script.sh"]

Here is the complete Dockerfile for you

FROM python:3.8

COPY requirements.txt requirements.txt


RUN pip install -r requirements.txt
COPY . .

RUN chmod a x script.sh

CMD ["./script.sh"]