python Docker Image: How to execute multiple scripts at once?

Question

I use the python image to run multiple python 3 scripts every few minutes. But this way I have to start a container multiple times.

docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp python:3 python dwhproxy.py writeweather "Hannover,de"
docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp python:3 python dwhproxy.py writetwitter "MarcTV"
docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp python:3 python dwhproxy.py writeyoutube

Is there a best practice to avoid this?

Neo Anderson · Accepted Answer · 2020-08-14 18:54:56Z

I don't see anything wrong in running one-shot python commands the way you are doing it. The --rm option will clean those one task containers.

I guess that your containers start-up almost instantly, therefore the start-up time shouldn't be a problem for you either.

However, if you want to launch a container and keep it alive, you can achieve it like this:

docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp python:3 tail -f /dev/null

Then you can get the ID of the running python container:

docker ps
CONTAINER ID        IMAGE               COMMAND               CREATED             STATUS              PORTS               NAMES
0b91c8df3d12        python:3            "tail -f /dev/null"   2 seconds ago       Up 1 second                             suspicious_joliot

and execute the python commands against the same container, one by one:

docker exec 0b91c8df3d12 python dwhproxy.py writeweather "Hannover,de"
docker exec 0b91c8df3d12 python dwhproxy.py writetwitter "MarcTV"
docker exec 0b91c8df3d12 python dwhproxy.py writeyoutube

or all in one shot:

docker exec ad9ae8d67290 sh -c 'python dwhproxy.py writeweather "Hannover,de" && python dwhproxy.py writetwitter "MarcTV" && python dwhproxy.py writeyoutube'

or even with your initial approach while having all three scripts executed:

docker run -it --rm python:3 sh -c 'python dwhproxy.py writeweather "Hannover,de" && python dwhproxy.py writetwitter "MarcTV" && python dwhproxy.py writeyoutube'

Collectives™ on Stack Overflow

python Docker Image: How to execute multiple scripts at once?

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related