To install Governor:
1. Please make full database backup (including system tables) before you will do upgrade of MySQL or switch to MariaDB. This action will prevent data losing in case if something goes wrong (you have to do this yourself)
2. Then run:
-bash-4.2# mysql -V
mysql Ver 14.14 Distrib 5.7.25, for Linux (x86_64) using EditLine wrapper
$ yum install governor-mysql
$ /usr/share/lve/dbgovernor/mysqlgovernor.py --mysql-version=mysql57
$ /usr/share/lve/dbgovernor/mysqlgovernor.py --install