2V0-622D · Question #246
An administrator has a three-host cluster with vSphere HA enabled. The master host is unable to ping one of the slave hosts over the management network. The slave host in question is showing as not re
The correct answer is C. VMware Tools are not installed on any of the virtual machines.. vSphere HA VM Monitoring requires VMware Tools to collect in-guest heartbeats, and without it installed no VM heartbeat data is available to trigger a restart.
Question
An administrator has a three-host cluster with vSphere HA enabled. The master host is unable to ping one of the slave hosts over the management network. The slave host in question is showing as not responding in vCenter server. Despite these conditions, none of the virtual machines located on the problematic host has been restarted. Which could be the reason?
Options
- AvMotion has not been configured properly on the hosts.
- BDatastore heartbeating is enabled on the cluster.
- CVMware Tools are not installed on any of the virtual machines.
- DThe virtual machines have VM Monitoring set to disabled.
How the community answered
(34 responses)- A9% (3)
- B6% (2)
- C65% (22)
- D21% (7)
Why each option
vSphere HA VM Monitoring requires VMware Tools to collect in-guest heartbeats, and without it installed no VM heartbeat data is available to trigger a restart.
vMotion configuration is unrelated to vSphere HA restart decisions - HA restarts VMs on surviving hosts in place and does not rely on vMotion for its recovery operations.
Datastore heartbeating helps HA distinguish a partitioned host from a truly failed one, but a functioning datastore heartbeat would more likely trigger or support a restart decision rather than suppress it.
VMware Tools must be installed for vSphere HA VM Monitoring to receive in-guest heartbeats from virtual machines. Without those heartbeats, HA has no mechanism to assess individual VM availability and therefore will not initiate automatic VM restarts, even when the host appears unresponsive to the master host.
VM Monitoring being explicitly disabled would also prevent restarts, but the underlying prerequisite for VM Monitoring to function at all is VMware Tools - without it, the monitoring subsystem has no data regardless of its enabled state.
Concept tested: VMware Tools requirement for vSphere HA VM Monitoring
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.avail.doc/GUID-262B4B0D-78C0-4B21-B315-12D40CA2D32C.html
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