Скачать или смотреть Fixing SQLSTATE[HY000] [2002] php_network_getaddresses Error in Symfony 5 Hosting

Learn how to troubleshoot and resolve the `SQLSTATE[HY000] [2002] php_network_getaddresses` error when deploying Symfony 5 projects to hosting environments.
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Troubleshooting SQLSTATE[HY000] [2002] Error in Symfony 5 Hosting

When deploying a Symfony 5 application to a hosting environment, encountering an error like SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known can be frustrating. This issue typically relates to database connection problems, signaling that Symfony cannot connect to your database using the specified host information.

Understanding the Problem

This specific error message indicates that the server handling your Symfony application is unable to resolve the hostname you’ve provided for the database in your .env file. The underlying causes may include:

An incorrect database host name or IP address.

Network issues preventing access to the database server.

The database server not being reachable on the specified host.

You also mentioned that a simple PHP script works perfectly with the same credentials. This tells us that the issue likely lies within Symfony's configuration rather than the database server being down or unresponsive.

Steps to Resolve the Issue

To fix this error and establish a proper connection to your production database, follow these steps:

1. Check Your .env Configuration

Review the database connection settings in your .env file. Ensure you are using the correct database credentials, host, and port. A typical configuration might look like this:

[[See Video to Reveal this Text or Code Snippet]]

2. Generate Environment Configuration for Production

In a production environment, it is best practice to generate a dedicated .env.prod file on the server. This file should contain the actual database connection details necessary for the production environment without committing sensitive data to your version control system.

To generate the .env.prod file, run the following command in your terminal:

[[See Video to Reveal this Text or Code Snippet]]

This command creates a production environment file using the current .env configurations, ensuring that Symfony uses the correct settings while running in production.

3. Clear Symfony Cache

After updating your environment variables, it’s important to clear Symfony's cache. A stale cache may hold onto old configurations, causing connection issues. Run the following command:

[[See Video to Reveal this Text or Code Snippet]]

4. Check the Server Connectivity

Make sure that your hosting provider allows connections to the database and that there are no firewall rules preventing access. You may want to:

Attempt to connect to the database from the command line using the same credentials.

Contact your hosting provider for assistance regarding database access and any network restrictions.

5. Additional Troubleshooting

If the error persists, consider the following additional checks:

Database Server Health: Ensure that the database server is running correctly and not experiencing issues.

Access Permissions: Verify that the user has the necessary permissions to access the database.

Conclusion

Debugging database connection issues can be tricky, especially when you transition from a local environment to a production server. By correctly configuring your .env.prod file, generating the production environment with composer, and ensuring that everything is connected correctly, you can resolve the SQLSTATE[HY000] [2002] error and get your Symfony application up and running smoothly on your hosting environment.

If you follow these steps and still face issues, don't hesitate to seek help from community forums or consult your hosting provider's support team for further assistance.