database-docker/docker-compose.yml at main · raqolbi/database-docker · GitHub

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services:
  # ==================================================
  # MySQL 8.4 (LTS)
  # ==================================================
  mysql:
    image: mysql:8.4
    container_name: mysql_db
    restart: unless-stopped
    networks:
      - shared-net

    environment:
      # Container timezone
      TZ: ${MYSQL_TZ}

      # Root (superuser) password
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}

      # Application user (created at init)
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD}

    ports:
      # MySQL host access
      - "${MYSQL_HOST_PORT}:3306"

    volumes:
      # Persistent MySQL data
      - ${MYSQL_DATA_PATH}:/var/lib/mysql

      # Initialization scripts:
      # - ./mysql/init:/docker-entrypoint-initdb.d

      # Custom scripts (if any)
      - ./scripts:/scripts:ro

    command:
      # Allow remote connections
      - --bind-address=0.0.0.0

      # Disable reverse DNS lookups (recommended)
      - --skip-name-resolve

  # ==================================================
  # MariaDB 11.4 (LTS)
  # ==================================================
  mariadb:
    image: mariadb:11.4
    container_name: mariadb_db
    restart: unless-stopped
    networks:
      - shared-net

    environment:
      # Container timezone
      TZ: ${MARIADB_TZ}

      # Root (superuser) password
      MARIADB_ROOT_PASSWORD: ${MARIADB_ROOT_PASSWORD}

      # Application user (created at init)
      MARIADB_USER: ${MARIADB_USER}
      MARIADB_PASSWORD: ${MARIADB_PASSWORD}

    ports:
      # MariaDB host access
      - "${MARIADB_HOST_PORT}:3306"

    volumes:
      # Persistent MariaDB data
      - ${MARIADB_DATA_PATH}:/var/lib/mysql

      # Initialization scripts:
      # - ./mariadb/init:/docker-entrypoint-initdb.d

      # Custom scripts (if any)
      - ./scripts:/scripts:ro

    command:
      # Allow remote connections
      - --bind-address=0.0.0.0

      # Disable reverse DNS lookups
      - --skip-name-resolve

  # ==================================================
  # PostgreSQL 18 (LTS track)
  # ==================================================
  postgres:
    image: postgres:18.4
    container_name: postgres_db
    restart: unless-stopped
    networks:
      - shared-net

    environment:
      # Container timezone
      TZ: ${POSTGRES_TZ}

      # --------------------------------------------------
      # PostgreSQL superuser (root-equivalent)
      #
      # IMPORTANT:
      # PostgreSQL Docker image only supports ONE user
      # via environment variables at initialization.
      # We always keep this as 'postgres'.
      # --------------------------------------------------
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: ${POSTGRES_ROOT_PASSWORD}

      # --------------------------------------------------
      # Application user credentials
      #
      # These variables are NOT handled by PostgreSQL
      # directly, but are consumed by:
      # - init scripts (docker-entrypoint-initdb.d)
      # - PgBouncer entrypoint script
      # --------------------------------------------------
      POSTGRES_USER_APP: ${POSTGRES_USER_APP}
      POSTGRES_PASSWORD_APP: ${POSTGRES_PASSWORD_APP}

    ports:
      # Direct PostgreSQL access
      # (admin tasks, migrations, debugging)
      - "${POSTGRES_HOST_PORT}:5432"

    volumes:
      # Persistent PostgreSQL data
      - ${POSTGRES_DATA_PATH}:/var/lib/postgresql

      # Initialization scripts:
      # - Create application user
      # - Assign CREATEDB / CREATEROLE privileges
      # NOTE: Scripts run ONLY if data directory is empty
      - ./postgres/init:/docker-entrypoint-initdb.d

  # ==================================================
  # PgBouncer (PostgreSQL Connection Pooler)
  # ==================================================
  pgbouncer:
    build: ./pgbouncer
    container_name: pgbouncer
    restart: unless-stopped
    networks:
      - shared-net

    depends_on:
      - postgres

    ports:
      # PgBouncer client access (applications / SQL clients)
      - "${PGBOUNCER_PORT}:6432"

    environment:
      # Admin / auth user (must exist in PostgreSQL)
      PGBOUNCER_AUTH_USER: ${PGBOUNCER_AUTH_USER}
      PGBOUNCER_AUTH_PASSWORD: ${PGBOUNCER_AUTH_PASSWORD}

      # Application user
      PGBOUNCER_APP_USER: ${PGBOUNCER_APP_USER}
      PGBOUNCER_APP_PASSWORD: ${PGBOUNCER_APP_PASSWORD}

    volumes:
      # PgBouncer runtime configuration only
      - ./pgbouncer/pgbouncer.ini:/etc/pgbouncer/pgbouncer.ini

networks:
  shared-net:
    name: shared-net