Docker中的多个Python脚本

Question

This is quite a basic question but I haven't been able to get an answer from researching on Google, although I think its more due to my lack of understanding, than the answer not being out there.

I am getting to grips with Docker and have a python Flask Admin script and a postgres db both in two separate containers but under on docker-compose file. I would like another python script to run at the same time which will be scraping a website. I have the file all set up but how do I include it in the same Docker-Compose or DockerFile?

version: '2'
services:
  db:
    image: postgres
    environment:
      - PG_PASSWORD=XXXXX
  dev:
    build: .
    volumes:
      - ./app:/code/app
      - ./run.sh:/code/run.sh
    ports:
      - "5000:5000"
    depends_on:
       - db

Answer 1

Exactly what to write depends on your directory configuration, but you basically want

version: '2'
services:
  db:
    image: postgres
    environment:
      - PG_PASSWORD=XXXXX
  dev:
    build: <path-to-dev>
    volumes:
      - ./app:/code/app
      - ./run.sh:/code/run.sh
    ports:
      - "5000:5000"
    depends_on:
      - db
  scraper:
    build: <path-to-scraper>
    depends_on:
      - db

The two paths might be the same. You might push an image and then reference that instead of building it on the fly. You might do the same business of just mounting the code directory instead of building it into the image (but don't do that for actual deployment).