docker-compose.yml

version: '4'
services:

  db1: 
    image: mysql:latest
    restart: always
    environment:
      - MYSQL_DATABASE=php_docker
      - MYSQL_USER=php_docker
      - MYSQL_PASSWORD=password
      - MYSQL_ALLOW_EMPTY_PASSWORD=1
      # MYSQL_ROOT_PASSWORD: password
    volumes:
      - "./db:/docker-entrypoint-initdb.d"

  db2: 
    image: mysql:latest
    restart: always
    environment:
      - MYSQL_DATABASE=php_docker
      - MYSQL_USER=php_docker
      - MYSQL_PASSWORD=password
      - MYSQL_ALLOW_EMPTY_PASSWORD=1
      # MYSQL_ROOT_PASSWORD: password
    volumes:
      - "./db:/docker-entrypoint-initdb.d"

  db3: 
    image: mysql:latest
    restart: always
    environment:
      - MYSQL_DATABASE=php_docker
      - MYSQL_USER=php_docker
      - MYSQL_PASSWORD=password
      - MYSQL_ALLOW_EMPTY_PASSWORD=1
      # MYSQL_ROOT_PASSWORD: password
    volumes:
      - "./db:/docker-entrypoint-initdb.d"

  haproxy:
    image: haproxy:latest
    ports:
      - "3306:3306"
    volumes:
      - "./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro"
    depends_on:
      - db1
      - db2
      - db3

  www1:
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - "./movie_database:/var/www/html"
    depends_on:
      - haproxy
    expose:
      - "80"

  www2:
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - "./movie_database:/var/www/html"
    depends_on:
      - haproxy
    expose:
      - "80"

  www3:
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - "./movie_database:/var/www/html"
    depends_on:
      - haproxy
    expose:
      - "80"

  nginx:
    image: nginx:latest
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
    depends_on:
      - www1
      - www2
      - www3
    ports:
      - "4000:4000"
  
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    ports:
      - 8001:80
    environment:
      - PMA_HOST=haproxy
      - PMA_PORT=3306