Assuming the appropriate HA configuration options have been selected, which of the following situations would not cause VMware HA to restart virtual machines (Choose Two)?
A.
A guest OS fails
B.
An ESX Server in the cluster becomes isolated from the network
C.
An ESX Server in the cluster is put into Maintenance Mode
D.
A guest OS is manually powered off
Explanation:
vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, page 11, 12, 23.VMware HA provides high availability for virtual machines by pooling them and the
hosts they reside on into a cluster. Hosts in the cluster are monitored and in the event of a
failure, the virtual machines on a failed host are restarted on alternate hosts.If you select Enable VM Monitoring, the VM Monitoring service (using VMware Tools)
evaluates whether each virtual machine in the cluster is running by checking for regular
heartbeats from the VMware Tools process running inside the guest. If no heartbeats are
received, this is most likely because the guest operating system has failed or VMware
Tools is not being allocated any time to complete tasks. In such a case, the VM
Monitoring service determines that the virtual machine has failed and the virtual machine
is rebooted to restore service.Host network isolation occurs when a host is still running, but it can no longer
communicate with other hosts in the cluster. With default settings, if a host stops
receiving heartbeats from all other hosts in the cluster for more than 12 seconds, it
attempts to ping its isolation addresses. If this also fails, the host declares itself as
isolated from the network. When the isolated host’s network connection is not restored
for 15 seconds or longer, the other hosts in the cluster treat it as failed and attempt to fail
over its virtual machines.In a cluster using DRS and VMware HA with admission control turned on, virtual
machines might not be evacuated from hosts entering maintenance mode. This is because
of the resources reserved to maintain the failover level. You must manually migrate the
virtual machines off of the hosts using VMotion.