Information Technology Reference
In-Depth Information
Each time you deploy a service using VMM, VMM will record which service template you
used as the basis of that deployment. If you update that service template later, VMM allows
you to update the service in deployment based on the changes that you made to the service
template.
VMM supports the following methods of updating a deployed service:
■
Apply updates to the in-place virtual machines that comprise the service.
■
Deploy new virtual machines with updated settings to replace the existing virtual ma-
chines that comprise the service.
Performing an in-place upgrade is usually the quickest option. To reduce the chance of
disruption when performing an in-place upgrade, you can configure multiple upgrade do-
mains to segment each tier. When configuring upgrade domains, you specify the number of
upgrade domains you want to use and VMM will arbitrarily sort virtual machines across that
number of upgrade domains. When VMs are segmented into upgrade domains, VMM will
apply updates to one upgrade domain at a time, only moving on to the next upgrade domain
once the updates are applied to the current upgrade domain.
Deploying new VMs is usually more time consuming. You choose this method when you
want to perform an operating system replacement. For example, you want to upgrade the
operating system from Windows Server 2012 to Windows Server 2012 R2. This becomes
more complicated if applications are installed on the virtual machines you want to replace. In
this case, if the application has a method of saving and restoring application state, you can
configure a script in the application profile to save that state to a separate location before
replacing the VM. An additional script will then restore the application state once the replace-
ment VM is running. If you are using Server App-V virtualized applications, the applications
automatically support the saving and restoration of state data without requiring scripts.
MORE INFO
UPDATING SERVICES IN VMM
You can learn more about updating services in VMM at
http://technet.microsoft.com/en-us/
Updating service templates
Updating the service template of a deployed service in VMM involves creating a copy of the
original service template and specifying a new release value. You then make the appropriate
updates to the service template.
To update an existing service template, perform the following steps:
1.
In the Library workspace of the VMM console, click Service Templates under the Tem-
plates node.
Select the service template that you want to update. On the Service Template tab of
the VMM console ribbon, click Create, and then click Copy.
2.
