vSphere power off all running VM's in a cluster

vsphere_poweroff_vm_cluster.ps1

#############################################################################################
# Power off or on all running vm's in a cluster
# Script must be run from same place for power on to work properly
# It writes to file the names of all the powered on VM's, this is to not power on VM's that 
# were previously powered off.   It then checks for that file for the power on cycle.
#
# http://vspherepowershellscripts.blogspot.com.au/2014/07/power-onoff-all-running-virtual.html?view=classic
#
#################################################################################################

#File Storage Path for list of powered on VM's
$filePath = "c:\temp\"

if ( (Get-PSSnapin -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue) -eq $null )
{
    Add-PsSnapin VMware.VimAutomation.Core
}


# Enter the virtualcenter you wish to connect to
$vCenter = Read-Host "Enter vCenter Name or IP"
Connect-VIServer $vCenter
$clusters = @(Get-Cluster)

# List out all the clusters in virtualcenter for selection
if($clusters.count -gt 1){
for($clusterCount=0;$clusterCount -lt $clusters.count; $clusterCount++){
$optionvalue = $clusterCount + 1
Write-Host $optionvalue ")" $clusters[$clusterCount].Name
}
$input = Read-Host "Select a Cluster"
$selectedCluster = $clusters[$input-1]
}
else{
$selectedCluster = Get-Cluster
}



function storeEnvironment
{#Store the powered VM list to a simple file
    #Use Streamwriter for simpler output, just a string name
    $PowerFile = New-Object System.IO.StreamWriter($filePath+"MTS_ON.txt")

	#Shutdown the powered on VM's 
	#If vmtools is running send shutdown signal, if no vmtools hard poweroff
    $PoweredVMs += Get-Cluster $selectedCluster | Get-VM | where {$_.Powerstate -eq "PoweredON" }
    foreach($objVM in $PoweredVMs)
        {
            $PowerFile.WriteLine($objVM)
			$vminfo = get-view -Id $objVM.ID
			#Get Vmware tools info
			if ($vminfo.config.Tools.ToolsVersion -eq 0)
			{
			Write-Host "$objVM doesn’t have vmware tools running.  Hard power-off" -foregroundcolor red
			#Hard power Off
			$objVM  | Stop-VM -confirm:$false -RunAsync 
			}
			else
			{
			write-host "$objVM has vmware tools running.  Gracefull shutdown " -foregroundcolor green
			#Power off gracefully
            		$objVM | Shutdown-VMGuest -confirm:$false 
			}
        }
    #} 
    $PowerFile.close()
}

function restoreEnvironment
{
    [array] $VMs = Get-Content -Path $filePath"MTS_ON.txt"
    foreach($VM in $VMs)
    {
        write-host "Starting $VM"
		Get-VM -Name $VM | Start-VM -RunAsync -confirm:$false
		
    }
    #Delete the configuration file
    Remove-Item $filePath"MTS_ON.txt"
}

#MAIN

#Test to see if the config file exists
if(Test-Path $filePath"MTS_ON.txt") 
{
    Write-Host "Restore from file? [Y]es or [N]o"
    $response = Read-Host
    if($response -eq "Y")
    {
        #Use file to restore VMs
        Write-Host "Restore Environment"
        restoreEnvironment
    }
    else
    {
        #Delete the configuration file
        Remove-Item $filePath"MTS_ON.txt"
    }   
}
else
{#Save the powered VMs to a file
    Write-Host "Saving Environment"
    storeEnvironment
}

Disconnect-VIServer -Server $vCenter -Confirm:$false