Скачать или смотреть Resolving SQLSTATE[HY000] [2002] Connection Refused in Laravel with Docker Setup

Learn how to effectively solve the `Connection refused` error when running Laravel migrations in a Docker environment. Discover the right configurations for your Docker Compose and .env files to ensure seamless database connectivity.
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Troubleshooting SQLSTATE[HY000] [2002] Connection Refused in Laravel with Docker

Setting up a Laravel development environment using Docker can be incredibly convenient, but sometimes it leads to frustrating issues, such as the notorious SQLSTATE[HY000] [2002] Connection refused error. This error typically occurs when Laravel cannot establish a connection to the MySQL database during the migration process. In this post, we will dive into the reasons behind this error and provide a clear, step-by-step solution to help you overcome the hurdle of database connectivity in your Laravel Docker setup.

Understanding the Problem

When you run the Laravel migrate command within your Docker environment, you may encounter the following error message:

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This error usually indicates that Laravel is unable to connect to the MySQL service, which could stem from various reasons such as incorrect configurations or issues with networking in Docker.

Common Causes

Incorrect database connection settings: Your .env file must accurately define how Laravel connects to your MySQL container.

Docker Networking Issues: There can be misconfigurations in your Docker Compose networking setup that prevent proper communication between containers.

Incorrect MySQL container startup: Sometimes the MySQL container may not have started successfully before the Laravel migration command is executed.

Step-by-Step Solution

1. Verify Your Docker Compose File

Take a close look at your docker-compose.yml file. Here’s a segment of the file for reference:

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Make sure your laravel network is properly set up, and consider specifying the driver for this network to avoid ambiguities. Here's how you can do it:

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2. Update Your .env File

Modify your .env file to properly reference the MySQL container by its service name. Replace any IP address references with the name used in your docker-compose.yml:

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By specifying DB_HOST=mysql, you allow Laravel to retrieve the IP address of the MySQL container dynamically, avoiding the need to hard-code an IP address which may change.

3. Rebuild and Restart Docker Containers

After making changes to your docker-compose.yml and .env file, you'll need to rebuild your containers to apply these updates. Run the following commands:

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This will stop and remove existing containers, then recreate them with your new settings.

4. Running Migrations

Once your containers are up and running, execute the migration command again within your artisan container like so:

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By following these instructions, your migration command should successfully connect to the MySQL database without producing a Connection refused error.

Conclusion

Encountering a SQLSTATE[HY000] [2002] Connection refused error can be a common yet annoying challenge when setting up Laravel with Docker. By verifying your Docker configurations, ensuring proper network settings, and leveraging your service names, you can seamlessly connect to your database. This setup not only allows you to run migrations smoothly but also paves the way for building robust applications using Laravel and Docker.

Feel free to reach out if you have more questions, or share your experiences setting up Laravel with Docker!