Users Guide

Administering High Availability for Hyper-V 45

Administering High Availability for

Hyper-V

This section provides guidance on the common administrative tasks to

manage HA VMs in a Hyper-V Host Cluster environment.

Changing the configuration of HA VMs

NOTE: The QFE in Microsoft KB951308 is required for the functionality described in

this section. For more information, see "Microsoft KB951308 QFE for Hyper-V Host

Clusters" on page 34.

Changes to a virtual machine configuration may or may not involve changing

the hardware profile of the VM. The steps required to successfully handle a

configuration change for an HA VM differs between whether the VM's

hardware profile is changed or not.

For Configuring Changes that Impact the VM's HW Profile

These are the changes that require the VM be in an OFF state or

SHUTDOWN state. Examples of this type of change include changing the

number of virtual processors, changing virtual memory, adding/removing

network and storage controllers, etc. Here are the high-level steps to make this

type of configuration change for an HA VM:

To successfully shut down or turn off an HA VM, use the VM control

actions available in the Failover Clustering MMC. Do not choose these

actions from the Hyper-V Manager console because that will cause the

cluster service to automatically restart the HA VM to maintain its HA

status.

Once the HA VM is shutdown, use the Hyper-V Manager Console to make

the changes.

After the changes are complete, use the Failover Cluster console to start

the HA VM.