<p>I'm trying to access a database through a Laravel application deployed in a Docker container, but I'm getting the following error message: </p> <pre class="brush:php;toolbar:false;">SQLSTATE[HY000] [2002] Connection refused SELECT * FROM `posts`</pre> <p>There is a table called posts in the database that I am trying to access from localhost/posts.</p> <p>/posts的Blade模板如下：</p> <pre class="brush:php;toolbar:false;">@extends('app') @section('content') <h1>Posts index page</h1> @forelse ($posts as $post) <h2>{{ $post->title }}</h2> @empty <h2>No posts!</h2> @endforelse @endsection</pre> <p>负责/posts的web.php中的路由如下：</p> <pre class="brush:php;toolbar:false;">Route::resource('/posts', PostController::class)->only(['index', 'store']);</pre> <p>PostController的index函数如下：</p> <pre class="brush:php;toolbar:false;">public function index() { $posts = Post::all(); return view('posts.index', compact('posts')); }</pre> <p>我的.env文件如下：</p> <pre class="brush:php;toolbar:false;">APP_NAME=Laravel APP_ENV=local APP_KEY=base64:1HEk/HaN8IL/wV8q4DCzpvmM/cYRDvGAIe 0DxS9ggo= APP_DEBUG=true APP_URL=http://localhost LOG_CHANNEL=stack LOG_DEPRECATIONS_CHANNEL=null LOG_LEVEL=debug DB_CONNECTION=mysql DB_HOST=127.0.0.1 DB_PORT=3307 DB_DATABASE=laravel_essentials_app DB_USERNAME=sail DB_PASSWORD=password BROADCAST_DRIVER=log CACHE_DRIVER=file FILESYSTEM_DISK=local QUEUE_CONNECTION=sync SESSION_DRIVER=file SESSION_LIFETIME=120 MEMCACHED_HOST=memcached REDIS_HOST=redis REDIS_PASSWORD=null REDIS_PORT=6379 MAIL_MAILER=smtp MAIL_HOST=mailhog MAIL_PORT=1025 MAIL_USERNAME=null MAIL_PASSWORD=null MAIL_ENCRYPTION=null MAIL_FROM_ADDRESS="hello@example.com" MAIL_FROM_NAME="${APP_NAME}" AWS_ACCESS_KEY_ID= AWS_SECRET_ACCESS_KEY= AWS_DEFAULT_REGION=us-east-1 AWS_BUCKET= AWS_USE_PATH_STYLE_ENDPOINT=false PUSHER_APP_ID= PUSHER_APP_KEY= PUSHER_APP_SECRET= PUSHER_HOST= PUSHER_PORT=443 PUSHER_SCHEME=https PUSHER_APP_CLUSTER=mt1 VITE_PUSHER_APP_KEY="${PUSHER_APP_KEY}" VITE_PUSHER_HOST="${PUSHER_HOST}" VITE_PUSHER_PORT="${PUSHER_PORT}" VITE_PUSHER_SCHEME="${PUSHER_SCHEME}" VITE_PUSHER_APP_CLUSTER="${PUSHER_APP_CLUSTER}"</pre> <p>我的docker-compose.yml文件如下：</p> <pre class="brush:php;toolbar:false;"># For more information: https://laravel.com/docs/sail version: '3' services: laravel.test: build: context: ./vendor/laravel/sail/runtimes/8.1 dockerfile: Dockerfile args: WWWGROUP: '${WWWGROUP}' image: sail-8.1/app extra_hosts: - 'host.docker.internal:host-gateway' ports: - '${APP_PORT:-80}:80' - '${VITE_PORT:-5173}:${VITE_PORT:-5173}' environment: WWWUSER: '${WWWUSER}' LARAVEL_SAIL: 1 XDEBUG_MODE: '${SAIL_XDEBUG_MODE:-off}' XDEBUG_CONFIG: '${SAIL_XDEBUG_CONFIG:-client_host=host.docker.internal}' volumes: - '.:/var/www/html' networks: - sail depends_on: - mysql - redis mysql: image: 'mysql/mysql-server:8.0' ports: - '${FORWARD_DB_PORT:-3307}:3306' environment: MYSQL_ROOT_PASSWORD: '${DB_PASSWORD}' MYSQL_ROOT_HOST: "${DB_HOST}" MYSQL_DATABASE: '${DB_DATABASE}' MYSQL_USER: '${DB_USERNAME}' MYSQL_PASSWORD: '${DB_PASSWORD}' MYSQL_ALLOW_EMPTY_PASSWORD: 1 volumes: - 'sail-mysql:/var/lib/mysql' - './vendor/laravel/sail/database/mysql/create-testing-database.sh:/docker-entrypoint-initdb.d/10-create-testing-database.sh' networks: - sail healthcheck: test: ["CMD", "mysqladmin", "ping", "-p${DB_PASSWORD}"] retries: 3 timeout: 5s redis: image: 'redis:alpine' ports: - '${FORWARD_REDIS_PORT:-6379}:6379' volumes: - 'sail-redis:/data' networks: - sail healthcheck: test: ["CMD", "redis-cli", "ping"] retries: 3 timeout: 5s networks: sail: driver: bridge volumes: sail-mysql: driver: local sail-redis: driver: local</pre> <p>我的操作系统是Windows 11，我在上面运行MySQL Workbench。这就是为什么我暴露3307端口而不是3306端口的原因。</p> <p>使用当前设置，我可以在wsl终端中无问题地运行php artisan migrate。</p> <p>为了避免连接被拒绝错误，我可以做什么来从localhost/posts访问posts？</p> <p><strong>解决方案</strong> 通过将.env中的DB_HOST更改为mysql，同时将DB_PORT更改为3306来解决问题。</p> <p><strong>编辑后的.env文件</strong></p> <pre class="brush:php;toolbar:false;">DB_CONNECTION=mysql DB_HOST=mysql DB_PORT=3306 DB_DATABASE=laravel_essentials_app DB_USERNAME=sail DB_PASSWORD=password</pre></p>