How Can I Fix Node.js Authentication Problems After Upgrading to MySQL 8.0?

Node.js Authentication Issues with MySQL 8.0

Node.js applications that previously connected to MySQL databases using the root account may encounter authentication errors when upgrading to MySQL 8.0 due to changes in the default authentication plugin.

Understanding the Issue

MySQL 8.0 now uses caching_sha2_password as the default authentication plugin, while MySQL 5.7 utilized mysql_native_password. Certain Node.js drivers for MySQL currently lack support for compatible authentication mechanisms for the new plugin.

Possible Solutions

To resolve this issue, consider implementing any of the following workarounds:

1. Alter the User Account:
   Alter the root user account to use the old mysql_native_password plugin:

   ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'MyNewPass';

2. Create a New User:
   Create a new user account that uses the mysql_native_password plugin:

   CREATE USER 'foo'@'localhost' IDENTIFIED WITH mysql_native_password BY 'bar';

3. Pull Request Approach:
   There is an ongoing pull request that aims to address this issue. Monitor its progress and apply the relevant changes when available.
4. Use Official MySQL Connector:
   Consider using the official MySQL Node.js connector, which is based on the X Protocol and already supports the new authentication mode.

Conclusion

The authentication issue between Node.js and MySQL 8.0 stems from the change in the default authentication plugin. The provided workarounds allow users to maintain their MySQL connections using either the old plugin or the official MySQL connector. It is recommended to implement a permanent solution by keeping an eye on updates to the Node.js drivers for MySQL.

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