SQL Server 2008 Hyber V Unleashed - p 37 doc

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11 Using Virtual Machine Manager 2008 for Provisioning
NOTE
The progress of the VM deployment can be monitored by selecting the VM in the
self-service portal and clicking Properties in the Actions pane. Then click the Latest
Job tab.
Migrating a VM
VMM provides the capability to move, or migrate, VMs quickly and easily between hosts.
There are three ways this can be accomplished in VMM.
The Migrate Virtual Machine Action
The Migrate Virtual Machine Wizard enables the administrator to migrate a VM to
another host using a VMM wizard, as follows:
1. Open the VMM Administrator console using the shortcut on the Windows desktop
or via the Start menu under Microsoft System Center, VMM 2008, VMM
Administrator console.
A Connect to Server window may open, prompting for the VMM server to connect
to. Enter the server name and connection port (the default is port 8100) using the
format VMMserver:port.
NOTE
You ma y c h oose to alw ays open a con n ectio n t o t his ser ver by se lecti n g t he Make Thi s
Server My Default check box. Doing so prevents this connection window from display-
ing when the Administrator console is run.
2. Go to the Virtual Machines view by clicking the Virtual Machines button.
3. Select the VM to migrate and click Migrate Virtual Machine from the Actions pane.
NOTE
If the selected VM is currently running, VMM will display a pop-up dialog warning the
administrator that migrating the VM will cause the VM to be stopped, resulting in a
temporary loss of service to all users of the machine. The VM is not stopped until the
migration actually begins. Click Yes to continue or No to quit.
4. On the Select Virtual Machine Host page, select the host to migrate the VM to. Use

the star ratings to determine a suitable host. Review the Additional Information tabs
in the Results pane for further information about the host’s star rating. Click Next
to continue.
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Migrating a VM
11
5. On the Select Path page, type the path on the host where the VM, and its associated
files should be stored on the host.
NOTE
The path entered must be a valid and already exist on the host.
Optionally, the administrator can check the Add This Path to the List of Host
Default Paths check box to add the path to the default paths on the host.
If SAN transfers are enabled the VM is transferred to the host over the SAN, by
default. If the administrator does not want to perform a SAN transfer, check the
Transfer over the Network Even if a SAN Transfer Is Available check box. This check
box is not available if SAN transfers are not available for this deployment.
Click Next to continue.
6. On the Select Network page, select the appropriate network that exists on the
selected host. If the administrator does not want to configure a network, select Not
Connected. Click Next.
7. On the Summary page, carefully review the settings and click Move to proceed with
the migration. The administrator can also choose to select the Start the Virtual
Machine Immediately After Deploying It to the Host check box, if desired.
The Migrate Virtual Machine Wizard offers a View Script button. This option allows the
administrator to view, modify, and save the PowerShell commands that the wizard will
execute to migrate the VM, as shown in the following example:
# ———————————————————————————————————————
# Migrate Virtual Machine Wizard Script

# ———————————————————————————————————————
# Script generated on Sunday, June 22, 2008 3:18:31 AM by Virtual Machine Manager
#
# For additional help on cmdlet usage, type get-help <cmdlet name>
# ———————————————————————————————————————
$VirtualNetworkAdapter = Get-VirtualNetworkAdapter -VMMServer vmm2008 | where
{$_.Name -eq “EDGE STD x64”}
Set-VirtualNetworkAdapter -VirtualNetworkAdapter $VirtualNetworkAdapter -RunAsyn-
chronously -VirtualNetwork “Realtek RTL8169/8110 Family PCI Gigabit Ethernet NIC
(NDIS 6.0) - Virtual Network” -NetworkTag ““ -Location ““ -JobGroup 3b72ecf7-ee0a-
4d5b-b84b-844505c3a7ed -VLanEnabled $false
$VM = Get-VM -VMMServer vmm2008 -Name “EDGE STD x64” | where {$_.VMHost.Name -eq
“DC1.companyabc.com”}
$VMHost = Get-VMHost -VMMServer vmm2008 | where {$_.Name -eq “DC1.companyabc.com”}
Move-VM -VM $VM -VMHost $VMHost -Path “C:\ProgramData\Microsoft\Windows\Hyper-V” -
RunAsynchronously -UseLAN -JobGroup 3b72ecf7-ee0a-4d5b-b84b-844505c3a7ed
This code can be saved and edited to facilitate migrating other VMs using the VMM
command shell.
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11 Using Virtual Machine Manager 2008 for Provisioning
NOTE
Running the wizard in this way is an easy way to create the PowerShell scripts neces-
sary to perform migrations using the VMM command shell. After the scripts have been
saved, the administrator can cancel the Migrate Virtual Machine Wizard.
Drag and Drop the VM onto a Host
Adding a guest virtual session onto an existing Hyper-V host server requires the process of
associating the virtual session to the host. This is done by dragging and dropping the
virtual guest session onto the host by doing th following:

1. Open the VMM Administrator console using the shortcut on the Windows desktop
or via the Start menu under Microsoft System Center, VMM 2008, VMM
Administrator console.
A Connect to Server window may open, prompting for the VMM server to connect
to. Enter the server name and connection port (the default is port 8100) using the
format VMMserver:port.
NOTE
You ma y c h oose to alw ays open a con n ectio n t o t his ser ver by se lecti n g t he Make Thi s
Server My Default check box. Doing so prevents this connection window from display-
ing when the Administrator console is run.
2. Go to the Virtual Machines view by clicking the Virtual Machines button.
3. Expand the Host Groups in the Properties pane to display the host upon which the
VM will be migrated, as shown in Figure 11.8.
4. Select the VM to migrate and drag and drop it onto the new host. The VM will be
migrated to the new host.
NOTE
If the selected VM is currently running, VMM will display a pop-up dialog warning the
administrator that migrating the VM will cause the VM to be stopped, resulting in a
temporary loss of service to all users of the machine. The VM is not stopped until the
migration actually begins. Click Yes to continue or No to quit.
Drag and Drop the VM onto a Host Group
This process is the same as dragging and dropping the VM onto a host, as described previ-
ously, with a few differences. Instead of dropping the VM onto a specific host, the VM is
dropped onto a host group that contains one or more hosts.
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Summary
11
FIGURE 11.8 Selecting the host on which to migrate the VM.

Automatic Placement, explained earlier in this chapter, will automatically place the VM on
the most suitable host in the selected host group. Host selection is based on the host
ratings defined either through the VMM global settings or by override settings in the VM’s
Properties page.
Summary
In this chapter, we discussed VM placement and host ratings to help the administrator
select the appropriate host for VM deployment. User roles provide a good deal of granular-
ity of administration within the VMM Administrator console and the self-service portal.
VMs can easily be deployed using both the VMM Administrator console and the self-
service portal. Migrations of VM can be performed easily using the Administrator console,
via wizards, or simple drag-and-drop methods, or from the VMM command console.
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Best Practices
The following are best practices from this chapter:
. Use roles-based access control (RBAC) to define the administrator roles in VMM.
. Because the Administrator user role has full access to the VMM infrastructure, limit
the number of members of this group as much as possible.
. Use delegate administrators to scope administrators to a specific set of objects in
VMM.
. Create a VMM Administrators group in the Active Directory and add that group to
the Administrator role in VMM. This is better than adding an individual user
account, in case that user account is deleted.
. Create security groups in the Active Directory and use these groups to define
members of Delegated Administrator and Self-Service User roles in VMM.
. Monitor the members of Delegated Administrator groups, because delegated admin-
istrators can manage the groups they are members of.
. Add administrators or delegated administrators to the Self-Service User role if self-
service portal access is required.

. Delegated Administrator and Self-Service User groups can be pre-created without
members, and the members can be added later.
. Run wizards, such as the Create Virtual Machine Wizard, to view, customize, and
save the PowerShell scripts that the wizard will run.
. Build a collection of PowerShell cmdlets that perform commonly used VMM admin-
istration tasks.
. Use the Look For box, present in many of the VMM wizards, to filter the results of
collections of VMM objects.
. Scope the VMM library resources that self-service users can access by creating their
own folders in the VMM Library share.
. Use Automatic Placement to automatically deploy VMs to the best-suited host.
. Customize the global host rating to match the organization’s needs and environment.
. Only use the Make This VM Highly Available option on VMs you plan to deploy to
host clusters.
. Use a common VM path on all host servers to ensure that VM migrations will
succeed.
. Use quota points for self-service users to control the number of VMs they can deploy
to hosts.
11 Using Virtual Machine Manager 2008 for Provisioning
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. Monitor the progress of VM migrations using the Jobs view in the Administrator
console or the Properties page of the VM in the self-service portal.
. Notify users of an active VM before migrating it to a new host, because the VM will
temporarily be stopped during the migration.
. Use Automatic Placement of migrated VMs by using the “drag and drop onto a host
group” method.
Best Practices
11

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PART V
Managing Guest
Sessions with Uptime in
a Hyper-V Environment
IN THIS PART
CHAPTER 12 Application-Level Failover and
Disaster Recovery in a Hyper-V
Environment 349
CHAPTER 13 Debugging and Problem Solving
the Hyper-V Host and Guest OS 385
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12
Application-Level
Failover and Disaster
Recovery in a Hyper-V
Environment
IN THIS CHAPTER
. Choosing the Best Fault
Tolerance and Recover y
Method
. Failover Clustering in Windows

Server 2008
. Overview of Failover Clustering
in a Hyper-V Host Environment
. Deploying a Failover Cluster for
Hyper-V Hosts
. Backing Up and Restoring
Failover Clusters
Organizations have expanded their implementation of
clustered servers and recovery solutions for physical server
systems. But now, with virtualization and several guest
sessions depending on the operation of a single host
system, the interest to implement highly available host
servers has grown dramatically. The failure of a single host
server can simultaneously bring down the services of several
systems, so the proper implementation of high-availability
technologies becomes extremely important. If properly
implemented, virtual servers can actually improve an orga-
nization’s ability to create highly available and fault-toler-
ant environments, because the creation of a redundant
guest session does not require the purchase of an addition
physical server for each replicated server.
However, the biggest challenge most organizations have in
creating a highly available virtualized environment is to
choose which technology to implement. There are many
ways to create fault tolerance, including the following:
. Clustering the host server
. Clustering the guest session
. Using native high-availability functionality of the
application being protected
. Purchasing and using a third-party application

An administrator must choose which failover or disaster-
recovery method to implement. The key is to choose the
best solution to meet the needs of the organization and to
try to minimize the number of methods implemented so
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