version: "3.9"

services:
  db:
    # if we're using mysql >= 8, some of sql queries aren't valid anymore, like for creating and grant an user at the same time
    image: mysql:5.7.22
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    container_name: db_pyros
    environment:
      # note : as db is an image of mysql, this root password will be set on the first installation on the image, if the value is changed, it will not be updated in the database
      - "MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD:-root}"
    volumes:
      - db:/var/lib/mysql/
    # create network to allow images to communicate with other images within the same network 
    networks: 
      - pyros-network
    healthcheck:
      test: ["CMD", 'mysqladmin', 'ping', '-h', 'db', '-u', 'root', '-p$$MYSQL_ROOT_PASSWORD' ]
      timeout: 10s
      interval: 5s
      retries: 20

  # service image of python, that let users to interact with python scripts such as pyros.
  install:
    # path to the Dockerfile of this image
    build: ..
    container_name: pyros
    # tty is the -t option in docker exec 
    tty: true
    # stdin_open is the -i option in docker exec
    stdin_open: true
    environment:
      # environment variables only for Docker
      - WITH_DOCKER=y
      - MYSQL_ROOT_LOGIN=root
      - MYSQL_TCP_PORT=3306
      # environment variables available for both Docker usage and non Docker usage
      - "MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD:-root}"
      - "MYSQL_PYROS_LOGIN=${MYSQL_PYROS_LOGIN:-pyros}"
      - "MYSQL_PYROS_PWD=${MYSQL_PYROS_PWD:-DjangoPyros}"
      #- "IP_PYROS_USER=${IP_PYROS_USER:-172.28.1.5}"
    volumes:
      - ..:/home/pyros_user/app
    # tells which port of local machine can communicate with the docker image (host:container), host is your local machine
    ports:
      - "8000:8000"
    # starting db service before install service 
    depends_on:
      - db
    # create network to allow images to communicate with other images within the same network 
    networks: 
      - pyros-network
        #ipv4_address: "${IP_PYROS_USER}"
    restart: always

# declaring volumes
volumes:
  db:
    driver: local
# declaring networks
networks: 
  pyros-network:
    #bridge is the default network driver
    driver: bridge