When you create a vSphere HA cluster or configure an existing cluster, you must configure settings that determine how the feature works.

In the vSphere Client, you can configure the following vSphere HA settings:

Host Monitoring
Enable host monitoring to allow hosts in the cluster to exchange network heartbeats and to allow vSphere HA to take action when it detects failures.
Note: Host Monitoring is required for the vSphere Fault Tolerance recovery process to work properly.
Admission Control
Enable or disable admission control for the vSphere HA cluster and choose a policy for how it is enforced.
Virtual Machine Options
Set the VM restart priority and host isolation response.
VM Monitoring
Enable VM Monitoring or VM and Application Monitoring.
Datastore Heartbeating
Specify preferences for the datastores that vSphere HA uses for datastore heartbeating.