Last time I looked at building onto our WMI automation script with processor creation.  Today, I want to cover how to add memory resources into the script.  Once again, I will take advantage of the existing patterns for creating this script.

# Set up variables$VHD = "f:\VHDs\win2k8.vhd"

$GuestVM = "Win2k8"

$Namespace = "root\virtualization"

$Computer = "Hyper-V2k8"

# Get instance of Msvm_VirtualSystemManagementService class$VSMSvc = Get-WmiObject -Class "Msvm_VirtualSystemManagementService" -Namespace $Namespace 

-ComputerName $Computer

# Get instance of Msvm_ComputerSystem class$VM = Get-WmiObject -Namespace $Namespace -ComputerName $Computer -Query "Select * From 

Msvm_ComputerSystem Where ElementName='$GuestVM'"

#Associating Msvm_VirtualSystemSettingData class with $VM$VMVSSD = Get-WmiObject -Namespace $Namespace -Query "Associators of {$VM} Where 

ResultClass=Msvm_VirtualSystemSettingData AssocClass=Msvm_SettingsDefineState"

# Define instance of Virtual IDE controller through an association$VMMEM = (Get-WmiObject -Namespace $Namespace -Query "Associators of ($VMVSSD) Where 

ResultClass=Msvm_MemorySettingData AssocClass=Msvm_VirtualSystemSettingDataComponent"

  | where-object -FilterScript {$_.ResourceSubType -eq "Microsoft Virtual Machine Memory"})

# Define memory resource attributes# set amount of memory (in megabytes)$VMMem.VirtualQuantity = [string]2048# set other attributes that are viewable in Hyper-V manager$VMMem.Reservation = [string]2048$VMMem.Limit = [string]2048

$VSMSvc.ModifyVirtualSystemResources($VM._Path, $VMMem.PSBase.GetText(1))

There you go. Memory has been defined and created for the virtual machine.  Next time, I will add a network resource via WMI.

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