建立数据库连接时出错 - Docker Wordpress & mysql设置

Question

我正在尝试在树莓派零上设置一个 wordpress docker 容器。 为什么我浏览我的树莓派零的 IPv4 地址，我在浏览器上看到以下内容

建立数据库连接时出错

运行两个容器后首先

pi@web-server:~/website $ docker container ls
CONTAINER ID   IMAGE               COMMAND                  CREATED          STATUS          PORTS                                       NAMES 
e1cf99c5422b   website_wordpress   "docker-entrypoint.s…"   44 seconds ago   Up 28 seconds   0.0.0.0:80->80/tcp, :::80->80/tcp           wordpress_container  
ff2fdee991fc   website_db          "/entrypoint.sh mysq…"   35 minutes ago   Up 30 seconds   0.0.0.0:3306->3306/tcp, :::3306->3306/tcp   db  

RAM 使用情况

最后我的 docker compose 文件“dockercompose.yaml”

version: "3.9"
services:
    db:
        build: ./db
        container_name: db
        ports:
            - "3306:3306"
        volumes:
            - db_data:/var/lib/mysql
        environment:
            MYSQL_ROOT_PASSWORD: y4e8kane
            MYSQL_DATABASE: wordpress
            MYSQL_USER: wordpress
            MYSQL_PASSWORD: y4e8kane
        networks:
            website_network:
                aliases:
                    - wordpress
    wordpress:
        build: .
        container_name: wordpress_container
        ports:
            - "80:80"
        networks:
            website_network:
                aliases:
                    - wordpress
        environment:
            WORDPRESS_DB_HOST: db:3306
            WORDPRESS_DB_USER: wordpress
            WORDPRESS_DB_PASSOWRD: y4e8kane
            WORDPRESS_DB_NAME: wordpress
networks:
    website_network:
        name: website_network
volumes:
    db_data:
        driver: local
        name: db_data

我在不同的目录中只有 2 个 dockerfile，与 docker-compose 位于同一级别我有一个与 wordpress 相关的 docker 文件，在 {current_dir}/db 上我还有另一个与 mysql db 相关的 dockerfile