Master Node in SchedulingDisabled state with error "NodeNotSchedulable"

Problem

• Master node continues to be in SchedulingDisabled state with NodeNotSchedulable error.
• Below error is seen in messages of the master node:

Nov  7 13:00:24 master.example.com Keepalived_vrrp[49446]: Opening file '/etc/keepalived/keepalived.conf'.

Nov  7 13:00:24 master.example.com Keepalived_vrrp[49446]: Cant find interface eth3 for vrrp_instance K8S_APISERVER !!!

Nov  7 13:00:24 master.example.com Keepalived_vrrp[49446]: VRRP_Instance(K8S_APISERVER) Unknown interface !

Environment

• Platform9 Edge Cloud - v5.3 and Higher.

Cause

• Incorrect interface name provided during cluster creation.
• Actual interface name was eth1 and name provided during cluster creation was eth3.

Resolution

• Rename the interface name on the node to same as what is provided during cluster creation