A vSphere administrator sees the alarm: vSphere HA virtual machine failed to failover
This occurred for a number of virtual machines on a particular ESXi host in a cluster with vSphere High Availability (HA) enabled. The virtual machines guest operating systems never reported a power event.
What occurred?
A. The virtual machines were vMotioned off of the ESXi host.
B. The ESXi host failed and vSphere HA successfully failed over the virtual machines.
C. The previous virtual machine cloning operations failed to complete.
D. The ESXi host is still running but has disconnected from the network.
The guest OS never reported a power event and therefore were still running on the host.
If the host failed as in powered off, all VM’s would be powered off as well. Then HA takes over and powers on the VMs on slave hosts, thus reporting a power event on the guest OS.
Answer B is incorrect, since the alarm actually points to the opposite fact, it is not able to failover the VM.
See the following KB article for more information: https://kb.vmware.com/s/article/2034571.
Correct answer is D.