vCenter – HA Error: The number of heartbeat datastores for host is 1

The following steps detail how to suppress the vCenter cluster warning:

The number of heartbeat datastores for host is 1, which is less than required: 2

You may encounter this situation in a lab scenario where you do not have greater than 1 shared datastore per cluster.

Log in to vCenter Server.
Right-click the cluster and click Edit Settings.
Click vSphere HA > Advanced Options.
Under Option, add an entry for das.ignoreInsufficientHbDatastore.
Under Value, type true.
Click Cluster Features.
De-select Turn on vSphere HA and click OK.
Wait for all the hosts in the cluster to deconfigure HA, then right-click the cluster and click Edit Settings.
Click Cluster Features.
Click Turn on vSphere HA.
Click OK.