Drupal 8未连接到Docker中的Mysql

Question

Durpal 8的目录结构：

.
├── docker-compose.yml
├── dump
│   └── drupal.sql
├── sessions
└── www
    └── core
    └── site
    └── modules
    └── vendor
    └── index.php

我的settings.php数据库配置

$databases['default']['default'] = array (
'database' => 'drupal',
'username' => 'root',
'password' => 'test',
'prefix' => '',
'host' => '127.0.0.1',
'port' => '3306',
'namespace' => 'Drupal\\Core\\Database\\Driver\\mysql',
'driver' => 'mysql',
);

我的docker-compose.yml代码

version: "2"
services:
www:
    image: drupal:8
    ports: 
        - "8001:80"
    volumes:
        - ./www:/var/www/html/
    depends_on:
        - db
    networks:
        - default
db:
    image: mysql:latest
    command: --default-authentication-plugin=mysql_native_password
    ports: 
        - "3306:3306"
    environment:
        MYSQL_DATABASE: drupal
        MYSQL_USER: user
        MYSQL_PASSWORD: test
        MYSQL_ROOT_PASSWORD: test
    volumes:
        - ./dump:/docker-entrypoint-initdb.d
        - /var/lib/mysql
    networks:
        - default
phpmyadmin:
    image: phpmyadmin/phpmyadmin
    links: 
        - db:db
    ports:
        - 8000:80
    environment:
        PMA_HOST: db
        MYSQL_USER: user
        MYSQL_PASSWORD: test
        MYSQL_ROOT_PASSWORD: test

使用上面的代码，我能够将phpmyadmin连接到mysql，并且工作正常，但是我无法将Drupal连接到mysql，并且出现以下错误：

PDOException:79#0/var/www/html/core/lib/Drupal/Component/DependencyInjection/PhpArrayContainer.php行上的/var/www/html/core/lib/Drupal/core/Database/Driver/mysql/Connection.php（420）：PDO中的SQLSTATE[HY000][2002]连接被拒绝-

Answer 1

替换loca ip地址

'host' => '127.0.0.1',

按服务docker名称

'host' => 'db',

Answer 2

我想您应该将数据库连接指向在docker compose文件中创建的主机名。注册时不能是本地主机地址：

$databases['default']['default'] = array (
'database' => 'drupal',
'username' => 'root',
'password' => 'test',
'prefix' => '',
'host' => 'db', #here you point to the container's service name
'port' => '3306', 
'namespace' => 'Drupal\\Core\\Database\\Driver\\mysql',
'driver' => 'mysql',
);