How to configure High Availability Linux Cluster with Pacemaker in CentOS

This video explains the configuring High Availability Cluster with Pacemaker in CentOS. Cluster is a group of server that can be can be used as a single system.
For more explanation on this video: https://www.linuxhelp.com/how-to-configure-high-availability-linux-cluster-with-pacemaker-in-centos/