1、connect error: Authentication plugin 'caching_sha2_password' cannot be loaded
MySql 8.0.11 or later for a new authentication plugin (caching_sha2_password), the original authentication plug-in is (mysql_native_password). The client tool Navicat Premium12 can not find a new authentication plugin (caching_sha2_password), this, we will be reduced to mysql_native_password mysql password encryption rule used by the user, can be successful landing.
[root@zabbix html]# systemctl restart mysqld.service
After the restart the service can connect to the database.