# ===========================================================================================
#
#  Script Information
#
#  Title:              shutdownESX.ps1
#  Author:             Josh Burkard
#  Date:               11.07.2011
#  Requirements:       Windows Powershell and the VI Toolkit
#  Usage:              .\shutdown.ps1
#                      .\shutdownESX.ps1 yes   -->   shutdown the datacenter 
#					                                without any question
#  
#  Description:        - Shutdown the defined VMware Datacenter
#                      - you have to set this variables:
#                          - VirtualCenter
#                          - DataCenter
#
#  The script will not run well, if the VirtualCenter server is running as VM in the same
#  data center.
#
#  I’m sure I don’t need to tell you that you need to be extremely careful when testing 
#  this script as one false move could shut down everything ! 
#  Please test this to make sure it works first !
#
#===========================================================================================


$VirtualCenter = "HostName of VirtualCenters"
$DataCenter    = "Test"

# Add the VI-Snapin if it isn't loaded already
if ((Get-PSSnapin -Name "VMware.VimAutomation.Core" -ErrorAction SilentlyContinue) -eq $null )
{
	Add-PSSnapin -Name "VMware.VimAutomation.Core"
}

Connect-VIServer $VirtualCenter
clear
if ($args[0] -ne "yes")
{
	Write-Host "Connected to " $VirtualCenter
	Write-Host
	Write-Host "==============================================================================="
	Write-Host "===                                                                         ==="
	Write-Host "===       WARNING!     WARNING!     WARNING!     WARNING!     WARNING!      ==="
	Write-Host "===                                                                         ==="
	Write-Host "==============================================================================="
	Write-Host
	Write-Host "  This script is designed to power off all virtual machines and the ESX host."
	Write-Host
	Write-Host
	$input = Read-Host "  TYPE 'YES' TO CONTINUE THIS SCRIPT AND SHUTDOWN ESX HOSTS NOW."
	if ($input -ne "yes")
	{
		Write-Host
		Write-Host "==============================================================================="
		Write-Host "===               THE SHUTDOWN PROCESS HAS BEEN CANCELLED.                  ==="
		Write-Host "==============================================================================="
		exit
	}
}
Write-Host
Write-Host "==============================================================================="
Write-Host "===                    THE SHUTDOWN PROCESS WILL RESUME.                    ==="
Write-Host "==============================================================================="

# Get All the ESX Hosts for the desired DataCenter
$ESXSRV = Get-DataCenter "Test" | Get-VMHost
Write ""
Write "available VM's:"
Write "==============="

# For each of the VMs on the DataCenter hosts
Foreach ($VM in ($ESXSRV | Get-VM))
{
    # Shutdown the guest cleanly
    If ($VM.Name -ne $VC)
    {
		$VMName = $VM.Name
		$VMState = $VM.PowerState
		Write "$VMName : $VMState"
		if ($VM.PowerState -eq "poweredOn")
		{
			$VM | Shutdown-VMGuest -Confirm:$false
		}
    }
}

# Set the amount of time to wait before assuming the remaining powered on guests are stuck
$waittime = 200 #Seconds


# Wait for the VMs to be Shutdown cleanly
$vms = Get-DataCenter $DataCenter | Get-VM
$numvms = ($vms.count - ($vms | where {$_.PowerState -eq "PoweredOff"}).Count)
Write-Host "Powered on VM's: $numvms "

$Time = (Get-Date).TimeofDay
do
{
	sleep 1.0
	$timeleft = $waittime - ($Newtime.seconds)
	$vms = Get-DataCenter $DataCenter | Get-VM
	$numvms = ($vms.count - ($vms | where {$_.PowerState -eq "PoweredOff"}).Count)
	Write-Host "Waiting for shutdown of $numvms VMs or until $timeleft seconds"
	$Newtime = (Get-Date).TimeofDay - $Time
} until ($numvms -eq 0 -or ($Newtime).Seconds -ge $waittime)

# Force VMs off
Foreach ($VM in ($ESXSRV | Get-VM | Where { $_.PowerState -ne “poweredOff” } ))
{
	$VM | Stop-VM -Confirm:$false | Out-Null
	Write-Host
	Write-Host $VM "has been forced to powering Off"
}

# Place ESX hosts in Maintenance Mode
$ESXSRV | Set-VMHost -State Maintenance | Out-Null
Write-Host
Write-Host "DataCenter" $DataCenter " is in Maintenance Mode"

# Shutdown the ESX Hosts
$ESXSRV | Foreach {Get-View $_.ID} | Foreach {$_.ShutdownHost_Task($TRUE)} | Out-Null
Write-Host
Write-Host "==============================================================================="
Write-Host "===                  THE SHUTDOWN PROCESS HAS COMPLETED.                    ==="
Write-Host "==============================================================================="

# Disconnect from the ESX Server
Write-Host
Disconnect-VIServer -Server $VirtualCenter -Confirm:$False
Write-Host "Disconnected from " $VirtualCenter