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2V0-621 · Question #86

During a vCenter Server upgrade, an ESXi 6.x host in a High Availability (HA) cluster fails. Which statement is true?

The correct answer is A. HA will fail the virtual machines over to an available host during the vCenter Server upgrade. vSphere HA operates independently of vCenter Server at the ESXi host level, so it can still detect and respond to host failures even while vCenter is being upgraded.

Section 6 – Administer vSphere 6.x Availability

Question

During a vCenter Server upgrade, an ESXi 6.x host in a High Availability (HA) cluster fails. Which statement is true?

Options

  • AHA will fail the virtual machines over to an available host during the vCenter Server upgrade
  • BHA is unavailable during the vCenter Server upgrade process.
  • CHA will fail the virtual machines over to an available host after the vCenter Server upgrade
  • DHA will successfully vMotion the virtual machines during the host failure.

How the community answered

(41 responses)
  • A
    76% (31)
  • B
    2% (1)
  • C
    7% (3)
  • D
    15% (6)

Why each option

vSphere HA operates independently of vCenter Server at the ESXi host level, so it can still detect and respond to host failures even while vCenter is being upgraded.

AHA will fail the virtual machines over to an available host during the vCenter Server upgradeCorrect

HA agents run directly on ESXi hosts and communicate peer-to-peer via the management network, independent of vCenter availability. When a host fails during a vCenter upgrade, the HA agents on surviving hosts detect the failure and immediately restart the affected VMs, without waiting for vCenter to come back online.

BHA is unavailable during the vCenter Server upgrade process.

HA does not require vCenter to be running to perform failover; the HA agents on hosts operate autonomously once the cluster has been configured.

CHA will fail the virtual machines over to an available host after the vCenter Server upgrade

HA reacts immediately to host failures regardless of vCenter state - it does not queue the failover until after the vCenter upgrade completes.

DHA will successfully vMotion the virtual machines during the host failure.

vMotion requires vCenter coordination and shared storage with both source and destination hosts active; it is a planned live migration and cannot be initiated during a host failure.

Concept tested: vSphere HA operation independence from vCenter availability

Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.avail.doc/GUID-overview.html

Topics

#vCenter upgrade#HA cluster#host failure behavior#availability during upgrade

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