vSphere HA can only be enabled via the vCenter Server that is managing the ESXi cluster. Since HA restarts virtual machines that were running on a failed host, it is essential to ensure that all of the ESXi hosts in the cluster have access to the same storage and the same virtual machine networks and that they have CPUs from the same family and feature set. If these factors are not considered before enabling HA on a cluster, then it could increase the chances of unplanned downtime.

In this recipe, we will learn how to enable HA on a host cluster.