Using vSphere HA Orchestrated Restart an administrator places the most mission critical VM in the highest priority. After a host failure, the highest priority VM fails to restart while VMs in high priority restart.
What would cause this to occur?
A. VMware Tools is not installed.
B. Proactive HA is disabled.
C. There are insufficient cluster resources.
D. Performance degradation VMs tolerate threshold is at default.
Proactive HA is disabled by default and VMware tools too. Then does not matter if Proactive HA is active, I wont work without VMware installed on the mission critical VMs. So, I think A. is correct
https://docs.vmware.com/en/VMware-vSphere/6.7/vsphere-esxi-vcenter-server-67-availability-guide.pdf
The answer is A – VMware Tools is not installed. The algorithm of HA Orchestrated restart should be:
HA monitors:
1) VM has resources secured will be first check perform by vSphere HA ensuring that VM has CPU and Memory reservation requirements on one of the host in the cluster,
2) VM is powered On
3) Wait for VMware tools heartbeats ensuring that the operating system has started within the Virtual Machine and VMware tools application heartbeat is detected and at last
4) VMware Tools Application Heartbeat confirmation ensuring that the VM is ready and the services are now available.
if you don’t have VMware Tools installed, how you will be sure that Applications in the first rule are started up successfully, so you are able to proceed with power-on machines from rule 2 and etc.?
The answer is A – VMware Tools is not installed. The algorithm of HA Orchestrated restart should be:
The above issues can be further fixed by using vSphere HA Orchestrated restart which performs a number of check to ensure Virtual Machines resources are secured and also focuses on Virtual Machine readiness.There are various checks performed like 1) VM has resources secured will be first check perform by vSphere HA ensuring that VM has CPU and Memory reservation requirements on one of the host in the cluster, 2) VM is powered On 3) Wait for VMware tools heartbeats ensuring that the operating system has started within the Virtual Machine and VMware tools application heartbeat is detected and at last 4) VMware Tools Application Heartbeat confirmation ensuring that the VM is ready and the services are now available.
if you don’t have VMware Tools installed, how you will be sure that Applications in the first rule are started up successfully, so you are able to proceed with power-on machines from rule 2 and etc.?
Yes it is C
If I meet this question on the exam I will chose C. Proactive HA only job is to place the host in Quarantine or Maintenance mode and v-motion the VMs.
Skyfx is right – HA is disabled
B