Upgrading to MySQL 8? Think of the default authentication plugin

As explained in a post at mysqlserverteam.com the default authentication plugin has been changed from mysql_native_password to caching_sha2_password. And that would certainly break all PHP-based applications because at the time of writing PHP doesn’t support caching_sha2_password. Please, keep an eye on the related request #76243. Once it’s implemented it would be possible to switch to caching_sha2_password but till then use “default_authentication_plugin = mysql_native_password” in your my.cnf file or start mysqld with –default-authentication-plugin= mysql_native_password.