Hyper-V Automation through scripts (Final Script)

Ok, so far we have created, modified, and added resources (memory, processor, disks, and network) to virtual machines.  Now, we want to take that information and build a complete virtual machine.

# Set up variables
$VHD = "f:\VHDs\win2k8.vhd"
$GuestVM = "Win2k8"
$Namespace = "root\virtualization"
$Computer = "HyperV"
$VHDSize = "10GB"
$VMSwitchName = "Hyper-V External Switch"
$VMSwitchPortName = "MyPort"
$VMNICAddress = "00155D9290FF"

$VMSvc = Get-WmiObject -class "Msvm_VirtualSystemManagementService" -namespace $Namespace -ComputerName $Computer
$VM = Get-WmiObject -Namespace $Namespace -ComputerName $Computer -Query "Select * From Msvm_ComputerSystem Where ElementName='$GuestVM'"
$VMSettingData = Get-WmiObject -Namespace $Namespace -Query "Associators of {$VM} Where ResultClass=Msvm_VirtualSystemSettingData AssocClass=Msvm_SettingsDefineState"

# Give the new virtual machine a name
$VMGlobalSettingClass = [WMIClass]"\\$Computer\root\virtualization:Msvm_VirtualSystemGlobalSettingData"

$NewVMGS = $VMGlobalSettingClass.psbase.CreateInstance()

while ($NewVMGS.psbase.Properties -eq $null) {}

$NewVMGS.psbase.Properties.Item("ElementName").value = $GuestVM

# Create  a virtual disk
$VMDiskSvc = Get-WmiObject -Class "Msvm_ImageManagementService" -Namespace "root\virtualization"

$DiskCreate = $VMDiskSvc.CreateFixedVirtualHardDisk($VHD, 10GB)
$DiskJob = [WMI]$DiskCreate.job

while (($DiskJob.JobState -eq "2") -or ($DiskJob.JobState -eq "3") -or ($DiskJob.JobState -eq "4")) {Start-Sleep -m 100 $DiskJob = [WMI]$DiskCreate.job}

#Create memory resource
$VMMem = (Get-WmiObject -Namespace $Namespace -Query "Associators of {$VMSettingData} Where ResultClass = Msvm_VirtualSystemSettingDataComponent" | where-object -FilterScript {$_.ResourceSubType -eq "Microsoft Virtual Machine Memory"})

$VMMem.VirtualQuantity = [string]2048
$VMMem.Reservation = [string]2048
$VMMem.Limit = [string]2048

# Create processor resource
$VMProc = (Get-WmiObject -Namespace $Namespace -Query "Associators of {$VMSettingData} Where ResultClass = Msvm_ProcessorSettingData" | where-object -FilterScript {$_.ResourceSubType -eq "Microsoft Processor"})

$VMProc.VirtualQuantity = [string]1
$VMProc.Reservation = [string]0
$VMProc.Limit = [string]100000
$VMProc.Weight = [string]100

# Create network interface
$DefaultNet = Get-WmiObject -Namespace $Namespace -Class Msvm_SyntheticEthernetPortSettingData | Where-Object -FilterScript {$_.InstanceID -like "*Default*"}

$GUID1 = [GUID]::NewGUID().ToString()
$GUID2 = [GUID]::NewGUID().ToString()

$VMSwitchQuery = Get-WmiObject -Class "Msvm_VirtualSwitchManagementService" -Namespace $Namespace

# $VMSvc = Get-WmiObject -Class "Msvm_VirtualSystemManagementService" -namespace $Namespace -ComputerName $Computer

$VMSwitch = Get-WmiObject -Namespace $Namespace -Query "Select * From Msvm_VirtualSwitch Where ElementName = '$VMSwitchName'"

$ReturnObject = $VMSwitchQuery.CreateSwitchPort($VMSwitch, [guid]::NewGuid().ToString(), $VMSwitchPortName, "")
$NewSwitchPort1 = $ReturnObject.CreatedSwitchPort

$ReturnObject = $VMSwitchQuery.CreateSwitchPort($VMSwitch, [guid]::NewGUID().ToString(), $VMSwitchPortName, "")
$NewSwitchPort2 = $ReturnObject.CreatedSwitchPort

$StaticNet = $DefaultNet.psbase.Clone()
$StaticNet.VirtualSystemIdentifiers = "{GUID1}"
$StaticNet.StaticMacAddress = $true
$StaticNet.Address = $VMNICAddress
$StaticNet.Connection = $NewSwitchPort1

$DynNet = $DefaultNet.psbase.Clone()
$DynNet.VirtualSystemIdentifiers = "{GUID2}"
$DynNet.Connection = $NewSwitchPort2

#Add the network interface resources to Resource Allocation Settings
$VMRASD = @()

$VMRASD += $StaticNet.psbase.gettext(1)
$VMRASD += $DynNet.psbase.gettext(1)
$VMRASD += $VMMem.psbase.gettext(1)
$VMRASD += $VMProc.psbase.gettext(1)

# Time to create the virtual machine
$VMSvc.DefineVirtualSystem($NewVMGS.psbase.GetText(1), $VMRASD)

# Add our disk to the virtual machine
# $VM = Get-WmiObject -Namespace $Namespace -ComputerName $Computer -Query "Select * From Msvm_ComputerSystem Where ElementName = '$GuestVM'"

# $VMSettingData = Get-WmiObject -Namespace $Namespace -Query "Associators of {$VM} Where ResultClass = Msvm_VirtualSystemSettingData AssocClass = Msvm_SettingsDefineState"

$VMIDECtrl = (Get-WmiObject -Namespace $Namespace -Query "Associators of {$VMSettingData} Where ResultClass = Msvm_ResourceAllocationSettingData AssocClass = Msvm_VirtualSystemSettingDataComponent" | where-object -FilterScript {$_.ResourceSubType -eq "Microsoft Emulated IDE Controller" -and $_.Address -eq 0})

$DiskAllocationSetting = Get-WmiObject -Namespace $Namespace -Query "Select * From Msvm_AllocationCapabilities Where ResourceSubType = 'Microsoft Synthetic Disk Drive'"

$DefaultDiskDrive = (Get-WmiObject -Namespace $Namespace -Query "Associators of {$DiskAllocationSetting} Where ResultClass = Msvm_ResourceAllocationSettingData AssocClass = Msvm_SettingsDefineCapabilities" | where-object -FilterScript {$_.InstanceID -like "*Default*"})

$DefaultDiskDrive.Parent = $VMIDECtrl._Path

$DefaultDiskDrive.Address = 0

$NewDiskDrive = ($VMSvc.AddVirtualSystemResources($VM._Path, $DefaultDiskDrive.PSBase.GetText(1))).NewResources

$DiskAllocationSetting = Get-WmiObject -Namespace $Namespace -Query "Select * From Msvm_AllocationCapabilities Where ResourceSubType = 'Microsoft Virtual Hard Disk'"

$DefaultHardDisk =  (Get-WmiObject -Namespace $Namespace -Query "Associators of {$DiskAllocationSetting} Where ResultClass = Msvm_ResourceAllocationSettingData AssocClass = Msvm_SettingsDefineCapabilities" | where-object -FilterScript {$_.InstanceID -like "*Default"})

$DefaultHardDisk.Parent = $NewDiskDrive
$DefaultHardDisk.Connection = $VHD

$VMSvc.AddVirtualSystemResources($VM._Path, $DefaultHardDisk.PSBase.GetText(1))

#Now, we add a DVD
$DVDAllocationSetting = Get-WmiObject -Namespace $Namespace -Query "Select * From Msvm_AllocationCapabilities Where ResourceSubType = 'Microsoft Synthetic DVD Drive'"

$DefaultDVDDrive = (Get-WmiObject -Namespace $Namespace -Query "Associators of {$DVDAllocationSetting} Where ResultClass = Msvm_ResourceAllocationSettingData AssocClass = Msvm_SettingsDefineCapabilities" | where-object -FilterScript {$_.InstanceID -like "*Default"})

$DefaultDVDDrive.Parent = $VMIDECtrl._Path

$DefaultDVDDrive.Address = 1

$NewDVDDrive = $DefaultDVDDrive.psbase.Clone()

$VMSvc.AddVirtualSystemResources($VM._Path, $NewDVDDrive.psbase.GetText(1))

In this code, I am using a data array to contain all of the resources that will be used to create the virtual machine.

$VMRASD = @()

$VMRASD += $StaticNet.psbase.gettext(1)
$VMRASD += $DynNet.psbase.gettext(1)

You will notice that the hard disk and DVD drive are not included in this array.  This is because they are added to a virtual IDE port.  These ports do not exist until after the virtual machine is created, so we add them after it is.

That wraps up this session for automating Hyper-V virtual machine creation through scripts.  As always, any comments or questions, let me know.