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Question

Description:
I am currently setting up a Laravel project using Docker and Laravel Sail. I am facing issues connecting to the MySQL service from the Laravel application. The error message indicates that the connection is being refused.

Environment:

Laravel version: 10.10
Docker version: v27.0.3
MySQL version: 8.0.32
Operating System: Windows 11 WSL version: 2.2.4.0 (Windows Subsystem for Linux 2)

Problem:
When I attempt to run the Laravel migrations or connect to the MySQL service from the Laravel container, I receive a “Connection refused” error.

Error Logs:

SQLSTATE[HY000] [2002] Connection refused (Connection: mysql, SQL: select table_name as `name`, (data_length + index_length) as `size`, table_comment as `comment`, engine as `engine`, table_collation as `collation` from information_schema.tables where table_schema = 'laravel' and table_type in ('BASE TABLE', 'SYSTEM VERSIONED') order by table_name)

Steps to Reproduce:

Set up Laravel Sail with the following docker-compose.yml:

version: '3'
services:
    laravel.test:
        build:
            context: ./vendor/laravel/sail/runtimes/8.2
            dockerfile: Dockerfile
            args:
                WWWGROUP: '${WWWGROUP}'
        image: sail-8.2/app
        extra_hosts:
            - 'host.docker.internal:host-gateway'
        ports:
            - '${APP_PORT:-80}:80'
            - '${VITE_PORT:-5173}:${VITE_PORT:-5173}'
        environment:
            WWWUSER: '${WWWUSER}'
            LARAVEL_SAIL: 1
            XDEBUG_MODE: '${SAIL_XDEBUG_MODE:-off}'
            XDEBUG_CONFIG: '${SAIL_XDEBUG_CONFIG:-client_host=host.docker.internal}'
            IGNITION_LOCAL_SITES_PATH: '${PWD}'
        volumes:
            - '.:/var/www/html'
        networks:
            - sail
        depends_on:
            - mysql
    mysql:
        image: 'mysql/mysql-server:8.0'
        ports:
            - '${FORWARD_DB_PORT:-3306}:3306'
        environment:
            MYSQL_ROOT_PASSWORD: '${DB_PASSWORD}'
            MYSQL_ROOT_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
networks:
    sail:
        driver: bridge
volumes:
    sail-mysql:
        driver: local

Environment configuration in .env and .env.testing files:

DB_CONNECTION=mysql
DB_HOST=mysql
DB_PORT=3306
DB_DATABASE=laravel
DB_USERNAME=sail
DB_PASSWORD=newpassword

Start the services:

./vendor/bin/sail up -d

Attempt to run the migrations:

./vendor/bin/sail artisan migrate --env=testing

Expected Behavior:
Laravel should connect to the MySQL database and run the migrations successfully.

Actual Behavior:
The connection is refused, and the following error is returned:

SQLSTATE[HY000] [2002] Connection refused

Troubleshooting Steps Taken:

Verified that MySQL is running:

./vendor/bin/sail exec mysql mysqladmin -u root -p status

Output indicates MySQL is running:

Uptime: 804  Threads: 2  Questions: 59  Slow queries: 0  Opens: 120  Flush tables: 3  Open tables: 39  Queries per second avg: 0.073

Checked MySQL logs:

./vendor/bin/sail logs mysql

Output:

mysql-1  | [Entrypoint] MySQL Docker Image 8.0.32-1.2.11-server
mysql-1  | [Entrypoint] Starting MySQL 8.0.32-1.2.11-server
mysql-1  | 2024-07-25T20:31:03.744066Z 0 [Warning] [MY-011068] [Server] The syntax '--skip-host-cache' is deprecated and will be removed in a future release. Please use SET GLOBAL host_cache_size=0 instead.
mysql-1  | 2024-07-25T20:31:03.744807Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.32) starting as process 1
mysql-1  | 2024-07-25T20:31:03.750686Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
mysql-1  | 2024-07-25T20:31:03.849883Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
mysql-1  | 2024-07-25T20:31:03.967731Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
mysql-1  | 2024-07-25T20:31:03.967761Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
mysql-1  | 2024-07-25T20:31:03.981964Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: /var/run/mysqld/mysqlx.sock
mysql-1  | 2024-07-25T20:31:03.982031Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.32'  socket: '/var/lib/mysql/mysql.sock'  port: 0  MySQL Community Server - GPL.

Verified MySQL is listening on port 3306:

./vendor/bin/sail exec mysql ss -tuln | grep 3306

Output confirms MySQL is listening on port 3306.

Ensured correct MySQL user privileges:

./vendor/bin/sail exec mysql mysql -u root -p
GRANT ALL PRIVILEGES ON *.* TO 'sail'@'%' IDENTIFIED BY 'newpassword';
FLUSH PRIVILEGES;

Tried connecting to MySQL from the Laravel container:

./vendor/bin/sail exec laravel.test mysql -u sail -p -h mysql

Successful connection from the container.

Verified Docker network configuration:

docker network inspect web2_sail

Output indicates the network is properly configured:

[
    {
        "Name": "web2_sail",
        "Id": "d4b00fbf3c2778f704a2c3025e6f3db476acf6c4afe6b967a246bf4bbcccb91d",
        "Created": "2024-07-25T20:31:03.142662932Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "0ed0e32a6b8c725be03d78959399043140cf97fc995ca0e0d38e2acd2aa7fd8f": {
                "Name": "web2-mysql-1",
                "EndpointID": "d2b25fb88d43d80468d6830b4b4839f80c2475d6eefa683798bd4fb086313bf8",
                "MacAddress": "02:42:ac:12:00:02",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            },
            "6541b649afb1482c08888c3b5590c04142979e1bf719598b8c52298a908bb04b": {
                "Name": "web2-laravel.test-1",
               

 "EndpointID": "0f655029a4258ab7fb7cfbee2d22535c25a844af30ba70045be234e92a85f669",
                "MacAddress": "02:42:ac:12:00:03",
                "IPv4Address": "172.18.0.3/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {
            "com.docker.compose.network": "sail",
            "com.docker.compose.project": "web2",
            "com.docker.compose.version": "2.28.1"
        }
    }
]

Tested connectivity from Laravel container:

./vendor/bin/sail exec laravel.test telnet mysql 3306

Output:

Trying 172.18.0.2...
telnet: Unable to connect to remote host: Connection refused

./vendor/bin/sail exec laravel.test nc -zv mysql 3306

Output:

nc: connect to mysql (172.18.0.2) port 3306 (tcp) failed: Connection refused

Verified MySQL configuration files:

./vendor/bin/sail exec mysql grep -r "bind-address" /etc/mysql

Output:

grep: /etc/mysql: No such file or directory

Created the testing database manually:

./vendor/bin/sail exec mysql mysql -u sail -p
CREATE DATABASE IF NOT EXISTS testing;

Request:
I need assistance identifying why the Laravel application cannot connect to the MySQL service within the Docker setup. Any insights or recommendations to resolve this issue would be greatly appreciated.

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Danh mục

Laravel Sail MySQL Connection Refused – Docker Setup Issue