Keepalived is one of the routing software for high avaibility on Linux. Keepalived uses VRRP (Virtual Router Redundancy Protocol). We need at least 2 servers to make Keepalived run, server1 as MASTER and server2 as BACKUP. When server1 is not working then server2 becomes MASTER and handles all requests and if server1 comes back online then server2 becomes BACKUP and server1 becomes MASTER again. This experiment we will use DigitalOcean Droplet