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Get Similar Virtual Machines in Hyper-V Clusters via PowerShell
Posted in Virtual Machine Manager, Windows Powershell | No Comment | 1,985 views | 21/02/2014 10:49

Following script could be used to find similar virtual machines in same Cluster or Hyper-V Host.
This is very useful to split virtual machines if they have same workloads.

For example if you have two virtual machines with same workload like:

IISServer01
IISServer02

This script will find them and list them with a useful output. You should use it on SCVMM 2012 R2 Console:

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function Get-SimilarVM
{
<#
    .SYNOPSIS
 
        Gets similar virtual machines in same cluster, host or cloud
 
    .EXAMPLE
 
        Get-SimilarVM
 
    .EXAMPLE
 
        Get-SimilarVM -ClusterName "VMHOSTCluster01"
 
    .EXAMPLE
 
        Get-SimilarVM -VMHostName "VMHOST01"
 
    .NOTES
 
        Author: Yusuf Ozturk
        Website: http://www.yusufozturk.info
        Email: ysfozy@gmail.com
        Date created: 20-Feb-2014
        Last modified: 21-Feb-2014
        Version: 1.1
 
    .LINK
 
        http://www.yusufozturk.info
 
#>
 
[CmdletBinding(SupportsShouldProcess = $true)]
param (
    [Parameter(
        Mandatory = $false,
        HelpMessage = 'Cluster Name')]
    [string]$ClusterName,
 
    [Parameter(
        Mandatory = $false,
        HelpMessage = 'Hyper-V Host')]
    [string]$VMHostName,
 
	[Parameter(
        Mandatory = $false,
        HelpMessage = 'Debug Mode')]
    [switch]$DebugMode = $false
)
	# Enable Debug Mode
	if ($DebugMode)
	{
		$DebugPreference = "Continue"
	}
	else
	{
		$ErrorActionPreference = "silentlycontinue"
	}
 
	# Create VM Array
	$VMArray = New-Object System.Collections.ArrayList
 
	if ($VMHostName)
	{
		# Get VMs
		$VMs = Get-SCVMHost -ComputerName $VMHostName | Get-VM
 
		# Clear VM Array
		$VMArray.Clear();
 
		foreach ($VM in $VMs)
		{
			# Get VM Subname
			$VMName = $VM.Name
			$VMSubName = $VMName.Substring(0,(($VMName.Length)-2))
 
			# Find Similar VMs
			$SimilarVMs = $VMs | Where Name -like "$VMSubName*"
 
			# Similar VM Count
			$SimilarVMCount = $SimilarVMs.Count
 
			if ($SimilarVMCount -gt "1")
			{
				foreach ($SimilarVM in $SimilarVMs)
				{
					$SimilarVMName = $SimilarVM.Name
					if ($VMArray.Contains("$SimilarVMName") -ne $True)
					{
						# Update VM Array
						$UpdateVMArray = $VMArray.Add("$SimilarVMName")
 
						# VM Total Size
						$VMTotalSize = [math]::round(($SimilarVM.TotalSize/1GB), 0)
 
						$Properties = New-Object Psobject
						$Properties | Add-Member Noteproperty Name $SimilarVM.Name
						$Properties | Add-Member Noteproperty VMHost $SimilarVM.VMHost.Name
						$Properties | Add-Member Noteproperty Cluster $Cluster.Name
						$Properties | Add-Member Noteproperty Cloud $SimilarVM.Cloud.Name
						$Properties | Add-Member Noteproperty UserRole $SimilarVM.UserRole.Name
						$Properties | Add-Member Noteproperty CPUCount $SimilarVM.CPUCount
						$Properties | Add-Member Noteproperty Memory $SimilarVM.Memory
						$Properties | Add-Member Noteproperty TotalSize $VMTotalSize
						$Properties | Add-Member Noteproperty BootDiskResource $SimilarVM.DiskResources[0].Name
						$Properties | Add-Member Noteproperty Status $SimilarVM.Status
						$Properties | Add-Member Noteproperty HasVirtualFibreChannelAdapters $SimilarVM.HasVirtualFibreChannelAdapters
						$Properties | Add-Member Noteproperty HasPassthroughDisk $SimilarVM.HasPassthroughDisk
						$Properties | Add-Member Noteproperty HasSharedStorage $SimilarVM.HasSharedStorage
						Write-Output $Properties
					}
				}
			}
		}
	}
	else
	{
		if ($ClusterName)
		{
			# Get Clusters
			$Clusters = Get-SCVMHostCluster -Name "$ClusterName"
		}
		else
		{
			# Get Clusters
			$Clusters = Get-SCVMHostCluster
		}
 
		foreach ($Cluster in $Clusters)
		{
			# Get VMs
			$VMs = Get-SCVMHost -VMHostCluster $Cluster | Get-VM
 
			# Clear VM Array
			$VMArray.Clear();
 
			foreach ($VM in $VMs)
			{
				# Get VM Subname
				$VMName = $VM.Name
				$VMSubName = $VMName.Substring(0,(($VMName.Length)-2))
 
				# Find Similar VMs
				$SimilarVMs = $VMs | Where Name -like "$VMSubName*"
 
				# Similar VM Count
				$SimilarVMCount = $SimilarVMs.Count
 
				if ($SimilarVMCount -gt "1")
				{
					foreach ($SimilarVM in $SimilarVMs)
					{
						$SimilarVMName = $SimilarVM.Name
						if ($VMArray.Contains("$SimilarVMName") -ne $True)
						{
							# Update VM Array
							$UpdateVMArray = $VMArray.Add("$SimilarVMName")
 
							# VM Total Size
							$VMTotalSize = [math]::round(($SimilarVM.TotalSize/1GB), 0)
 
							$Properties = New-Object Psobject
							$Properties | Add-Member Noteproperty Name $SimilarVM.Name
							$Properties | Add-Member Noteproperty VMHost $SimilarVM.VMHost.Name
							$Properties | Add-Member Noteproperty Cluster $Cluster.Name
							$Properties | Add-Member Noteproperty Cloud $SimilarVM.Cloud.Name
							$Properties | Add-Member Noteproperty UserRole $SimilarVM.UserRole.Name
							$Properties | Add-Member Noteproperty CPUCount $SimilarVM.CPUCount
							$Properties | Add-Member Noteproperty Memory $SimilarVM.Memory
							$Properties | Add-Member Noteproperty TotalSize $VMTotalSize
							$Properties | Add-Member Noteproperty BootDiskResource $SimilarVM.DiskResources[0].Name
							$Properties | Add-Member Noteproperty Status $SimilarVM.Status
							$Properties | Add-Member Noteproperty HasVirtualFibreChannelAdapters $SimilarVM.HasVirtualFibreChannelAdapters
							$Properties | Add-Member Noteproperty HasPassthroughDisk $SimilarVM.HasPassthroughDisk
							$Properties | Add-Member Noteproperty HasSharedStorage $SimilarVM.HasSharedStorage
							Write-Output $Properties
						}
					}
				}
			}
		}
	}
}

You can define Cluster and Hyper-V Host in function to minimize scope.

For Hyper-V Host Specific Search:

Get-SimilarVM -VMHostName "VMHOST01"

For Cluster Specific Search:

Get-SimilarVM -ClusterName "VMHOSTCluster01"

Searching in all clusters:

Get-SimilarVM

You can customize output to see what you need.



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