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.

  1. Log in to vCenter Server.
  2. Right-click the cluster and click Edit Settings.
  3. Click vSphere HA > Advanced Options.
  4. Under Option, add an entry for das.ignoreInsufficientHbDatastore. das-ds1
  5. Under Value, type true.
  6. Click Cluster Features.
  7. De-select Turn on vSphere HA and click OKdas-ds2
  8. Wait for all the hosts in the cluster to deconfigure HA, then right-click the cluster and click Edit Settings.
  9. Click Cluster Features.
  10. Click Turn on vSphere HAdas-ds3
  11. Click OK.


Reference VMware KB:

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