docker-compose.yml

what is it?

config file that docker compose uses to build images and run containers

example

docker-compose.yml

services:
  web:
    build:
      context: .
      dockerfile: ./compose/local/django/Dockerfile
    image: django_celery_example_web
    # '/start' is the shell script used to run the service
    command: /start
    # this volume is used to map the files and folders on the host to the container
    # so if we change code on the host, code in the docker container will also be changed
    volumes:
      - .:/app
    ports:
      - 8010:8000
    # env_file is used to manage the env variables of our project
    env_file:
      - ./.env/.dev-sample
    depends_on:
      - redis
      - db
 
  db:
    image: postgres:16-alpine
    volumes:
      - postgres_data:/var/lib/postgresql/data/
    environment:
      - POSTGRES_DB=hello_django
      - POSTGRES_USER=hello_django
      - POSTGRES_PASSWORD=hello_django
 
  redis:
    image: redis:7-alpine
 
  celery_worker:
    build:
      context: .
      dockerfile: ./compose/local/django/Dockerfile
    image: django_celery_example_celery_worker
    command: /start-celeryworker
    volumes:
      - .:/app
    env_file:
      - ./.env/.dev-sample
    depends_on:
      - redis
      - db
 
  celery_beat:
    build:
      context: .
      dockerfile: ./compose/local/django/Dockerfile
    image: django_celery_example_celery_beat
    command: /start-celerybeat
    volumes:
      - .:/app
    env_file:
      - ./.env/.dev-sample
    depends_on:
      - redis
      - db
 
  flower:
    build:
      context: .
      dockerfile: ./compose/local/django/Dockerfile
    image: django_celery_example_celery_flower
    command: /start-flower
    volumes:
      - .:/app
    env_file:
      - ./.env/.dev-sample
    ports:
      - 5557:5555
    depends_on:
      - redis
      - db
 
volumes:
  postgres_data:

see .env file example