Laravel Sail Docker MySQL connection issue

Question

I'm trying to access a database through a Laravel application deployed in a Docker container, but I'm getting the following error message:

SQLSTATE[HY000] [2002] Connection refused
SELECT * FROM `posts`

There is a table called posts in the database that I am trying to access from localhost/posts.

/posts的Blade模板如下：

@extends('app')
@section('content')
    <h1>Posts index page</h1>
    @forelse ($posts as $post)
        <h2>{{ $post->title }}</h2>
    @empty
        <h2>No posts!</h2>
    @endforelse
@endsection

负责/posts的web.php中的路由如下：

Route::resource('/posts', PostController::class)->only(['index', 'store']);

PostController的index函数如下：

public function index()
    {
        $posts = Post::all();
        return view('posts.index', compact('posts'));
    }

我的.env文件如下：

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}"

我的docker-compose.yml文件如下：

# 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

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。

使用当前设置，我可以在wsl终端中无问题地运行php artisan migrate。

为了避免连接被拒绝错误，我可以做什么来从localhost/posts访问posts？

解决方案 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。

编辑后的.env文件

DB_CONNECTION=mysql
DB_HOST=mysql
DB_PORT=3306
DB_DATABASE=laravel_essentials_app
DB_USERNAME=sail
DB_PASSWORD=password

Answer 1

Set the value of DB_HOST to mysql

in your .env file