docker-compose.yml

version: '3.8'
services:

    # Application
    app:
        build:
            context: .
            dockerfile: docker/app.dockerfile
        working_dir: /var/www
        volumes:
            - ./:/var/www
        depends_on:
            - "database"
        deploy:
            mode: replicated
            replicas: 2
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 3
                window: 120s


    # DB Balancer
    db_balancer:
        image: nginx:1.21
        working_dir: /var/www
        volumes:
            - ./:/var/www
            - ./docker/nginx/db_balancer.conf:/etc/nginx/conf.d/default.conf
            - ./docker/nginx/db_balancer/logs/:/var/log/nginx/
        depends_on:
            - "app"
        ports:
            -   "80"


    # Web Server
    web:
        image: nginx:1.21
        working_dir: /var/www
        volumes:
            - ./:/var/www
            - ./docker/nginx/nginx.conf:/etc/nginx/conf.d/default.conf
            - ./docker/nginx/logs/:/var/log/nginx/
        depends_on:
            - "app"
        deploy:
            mode: replicated
            replicas: 2
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 3
                window: 120s

    # Web Balancer
    web_balancer:
        image: nginx:1.21
        working_dir: /var/www
        volumes:
            - ./:/var/www
            - ./docker/nginx/web_balancer.conf:/etc/nginx/conf.d/default.conf
            - ./docker/nginx/web_balancer/logs/:/var/log/nginx/
        depends_on:
            - "web"
        ports:
            -   "80"

    # Database
    database:
        image: mysql:8.0
        volumes:
            - dbdata:/var/lib/mysql
        environment:
            MYSQL_DATABASE: ${DB_DATABASE}
            MYSQL_ROOT_PASSWORD: ${DB_PASSWORD}
            MYSQL_PASSWORD: ${DB_PASSWORD}
            MYSQL_USER: ${DB_USERNAME}
            MYSQL_RANDOM_ROOT_PASSWORD: 'yes'
        deploy:
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 3
                window: 120s
        ports:
            -   "3306"

    # Database management
    pma:
        image: phpmyadmin:5.1
        environment:
            PMA_HOST: database
            PMA_PORT: ${DB_PORT}
        depends_on:
            - database
        ports:
            - "80"

volumes:
    dbdata: