No exit option on the docker image to prevent the container from exiting

[m3h0w]

I'm running the mongo-seeding docker image in an e2e test pipeline and since --exit-code-from <service_x> option in docker-compose implies --abort-on-container-exit, my pipeline gets shutdown when mongo-seeding exits instead when the service_x exits.

I'd like to make the mongo-seeding container sleep or somehow keep running after it has done its job to prevent the --abort-on-container-exit being triggered. Is there a way I could do that without the need to modify the image itself? Thanks!

[m3h0w]

Here's what I did instead for now:

entry.sh:

#!/bin/sh
seed
tail -f /dev/null

Dockerfile:

FROM pkosiec/mongo-seeding:3.6.0

ENTRYPOINT [ "/app/scripts/entry.sh" ]

Plus the relevant service in docker-compose with volumes mount for completeness:

  mongo-seed:
    build:
      context: ./mongoSeed
    volumes:
      - ./mongoSeed/data:/app/data
      - ./mongoSeed/scripts:/app/scripts
    working_dir: /app/data
    depends_on:
      - mongodb

[pkosiec]

Hi @m3h0w,
You don't need to modify the image. You can easily change the entrypoint and command via Docker Compose file:

• https://docs.docker.com/compose/compose-file/compose-file-v3/#entrypoint
• https://docs.docker.com/compose/compose-file/compose-file-v3/#command

So, you can try using the same commands you had in the entry.sh script:

mongo-seed:
  # (...)
  entrypoint: ["sh"]
  command: ["-c", "seed; sleep infinity"]

I didn't test it with Docker Compose, but it should work, as the following Docker command works exactly as you would like to:

docker run --rm --entrypoint="sh" pkosiec/mongo-seeding -c 'seed; sleep infinity'

Let me know if that helps. Cheers!

[iampeterbanjo]

Thanks for your response. I was trying to solve this problem today for about an hour or so. It would be great if this workaround was documented.

[pkosiec]

Hi @iampeterbanjo, good idea! Done in #194 🙂 Cheers!

[iampeterbanjo]

Thank you ☺️