sudo yum install mysql-server
sudo yum install mysql-devel
sudo service mysqld start
sudo mysql_secure_installation
sudo vi /etc/my.cnf
Add anywhere below [mysqld] and above [mysqld_safe]:
wait_timeout=31536000 (to prevent disconnecting after inactivity)
max_allowed_packet=16M (to allow bigger packets between app and server)
sudo service mysqld restart