在与 Docker 不同的端口上运行 MySql

Question

我遇到了与 Run MySQL on Port 3307 Using Docker Compose 类似的问题，但要么我看不到树木的木材，要么这里的解决方案不起作用。

我有以下 docker-compose.yml 文件：

version: '3'
services:
    db:
        image: mysql:5.7
        container_name: squirrels_db
        volumes:
          - db_data:/var/lib/docker/volumes/squirrels_db_data/_data
        restart: always
        ports:
          # <Port exposed> : <MySQL Port running inside container>
          - 3310:3306
        environment:
            MYSQL_ROOT_PASSWORD: password
            MYSQL_DATABASE: wordpress
            MYSQL_USER: mydb_user
            MYSQL_PASSWORD: password
        volumes:
          - ./var/lib/docker/volumes/squirrels_db_data/_data
        networks:
          internal-net:
            ipv4_address: 172.29.0.11

    wordpress:
        image: wordpress:latest
        container_name: squirrels_web
        depends_on:
            - db
        ports:
           - 8000:80
        restart: always
        environment:
            WORDPRESS_DB_HOST: db:3306
            WORDPRESS_DB_USER: mydb_user
            WORDPRESS_DB_NAME: mydb_name
            WORDPRESS_DB_PASSWORD: password

        volumes:
          - ./data/wp_content:/var/www/html/wp-content
          - ./config/wordpress/uploads.ini:/usr/local/etc/php/conf.d/uploads.ini
        networks: 
          nginx-proxy:
          internal-net:
            ipv4_address: 172.29.0.12      

# Names our volume
volumes:
  db:

networks:
  nginx-proxy:
    external:
      name: nginx-proxy
  internal-net:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: 172.29.0.0/16

注意：我在这里更改了用户名和密码，最终会将它们保存在 .env 文件中

当我点击http://localhost:8000 时，我在日志中看到一条 WordPress 传递的“建立数据库连接时出错”消息和以下内容（来自 docker-compose 日志）：

PHP 警告：mysqli::__construct(): (HY000/2002): 连接被拒绝 在第 22 行的标准输入代码中 MySQL 连接错误：（2002） 连接被拒绝

这现在正式让我发疯了，仅仅知道我错过了一些明显的东西就没有任何帮助！因此，任何意见或建议都非常感谢

谢谢

Answer 1

我设法让它工作。这是工作文件——我将在下面解释我的更改：

version: "3"
services:
  db:
    image: mysql:5.7
    container_name: squirrels_db
    volumes:
      # You prepended with db_data: but volume was called db – scroll down to volumes to see my fix
      - db_data:/var/lib/docker/volumes/squirrels_db_data/_data
    restart: always
    ports:
      # <Port exposed> : <MySQL Port running inside container>
      - 3310:3306
    environment:
      MYSQL_ROOT_PASSWORD: password
      # This is likely the isse - you called it wordpress but tried to connect to mydb_name in the wordpress container
      MYSQL_DATABASE: mydb_name
      MYSQL_USER: mydb_user
      MYSQL_PASSWORD: password
    # REMOVE BELOW 2 LINES - you declared above
    # volumes:
    #   - ./var/lib/docker/volumes/squirrels_db_data/_data
    networks:
      internal-net:
        ipv4_address: 172.29.0.11

  wordpress:
    image: wordpress:latest
    container_name: squirrels_web
    depends_on:
      - db
    ports:
      - 8000:80
    restart: always
    environment:
      WORDPRESS_DB_HOST: db # db:3306 is fine but that's default so removed
      WORDPRESS_DB_USER: mydb_user
      WORDPRESS_DB_NAME: mydb_name
      WORDPRESS_DB_PASSWORD: password
    volumes:
      - ./data/wp_content:/var/www/html/wp-content
      - ./config/wordpress/uploads.ini:/usr/local/etc/php/conf.d/uploads.ini
    networks:
      nginx-proxy:
      internal-net:
        ipv4_address: 172.29.0.12

# Names our volume
volumes:
  # FIX: renamed from db to db_data. Added {} to declare an empty volume
  db_data: {}

networks:
  nginx-proxy:
    external:
      name: nginx-proxy
  internal-net:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: 172.29.0.0/16

变化

1. 我认为您的缩进很好 - 但我将其更改为第一次测试

2. 您在 db 容器中声明了 2 个卷键。第一个看似正确，第二个缺少 db_data: volume 前缀。

3. 您的卷名为 db，但被用作（如第 2 点）作为 db_data

4. 您的数据库名称不匹配。您在MYSQL_DATABASE: wordpress 的设置中调用了db wordpress，然后尝试在WORDPRESS_DB_NAME: mydb_name 连接到mydb_name

更简单的解决方案

虽然上述方法可行，但您确实需要网络吗？下面的方法也可以，而且更简单：

version: "3"
services:
  db:
    image: mysql:5.7
    container_name: squirrels_db
    volumes:
      - db_data:/var/lib/docker/volumes/squirrels_db_data/_data
    restart: always
    ports:
      - 3310:3306
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: mydb_name
      MYSQL_USER: mydb_user
      MYSQL_PASSWORD: password

  wordpress:
    image: wordpress:latest
    container_name: squirrels_web
    depends_on:
      - db
    ports:
      - 8000:80
    restart: always
    environment:
      WORDPRESS_DB_HOST: db
      WORDPRESS_DB_USER: mydb_user
      WORDPRESS_DB_NAME: mydb_name
      WORDPRESS_DB_PASSWORD: password
    volumes:
      - ./data/wp_content:/var/www/html/wp-content
      - ./config/wordpress/uploads.ini:/usr/local/etc/php/conf.d/uploads.ini

volumes:
  db_data: {}