VMResettoLCP

Powershell script to reset Hyper-V VM to last checkpoint (incl. check if VM is running and the option to stop them).

Table of Contents generated with DocToc

• What it does
• How to use
• Additional info
  • Option 1
  • Option 2
• Known issues and future releases

What it does

This script reset all Hyper-VM machines to their last checkpoint (VM Reset to Last Checkpoint), checks if a VM is running bevore doing it and gives shiny bright colored output about what it does at the moment. If done, Resetto gives you a report about succsessful reseted VMs and VMs which where not reseted because their where running. You than have the option to stop and reset them, too, with a simple variable.

How to use

Simply execute this .ps1 script and follow further instructions if needed.

Additional info

All your running VMs will not be reseted and listed separately at the end instead.

Then you have two options:

Option 1

You can follow instructions as displayed in the end to stop and reset the rest of the VMs with the variable:

    . $KILLandREVERT

Please note the dot and space in front of the variable!

The script will show you this option by default at the end if you where running it with 1 or more VMs still running. This is to prevent you from resetting any VM which could be vital to your environment.

What . $KILLandREVERT does in particular

Basicly the same thing as bevore but it stops every running VM with Stop-VM -Name $RVM -ComputerName $VMHost and supresses any warnings with -Confirm:$false.

$KILLandREVERT = {`
    For ( $RVMCount = 0; $RVMCount -lt $VMList.Count; $RVMCount++)
    {$RVM = $VMList[$RVMCount].Name
    if ( !($RVMdown = $VMList[$RVMCount].State -eq 'Off') )
      { Stop-VM -Name $RVM -ComputerName $VMHost -Confirm:$false
        Write-Host $objItem.Name, $objItem.WorkingSetSize -foregroundcolor "green" $RVM 'STOPPED and reverted to last snapshot...'
        sleep $SleepTime
        Get-VM -Name $RVM | Foreach-Object { $_ | Get-VMSnapshot | Sort CreationTime | Select -Last 1 | Restore-VMSnapshot -Confirm:$false }
       }
    else {}
    }
}

Option 2

If you are sure you want to kill and revert all running VMs begin with (not recommendet), than you can simply change the script and uncomment this line:

#  Stop-VM -Name $VM -ComputerName $VMHost -Confirm:$false

That the code looks like this:

   Stop-VM -Name $VM -ComputerName $VMHost -Confirm:$false

Known issues and future releases

The code is pretty messy and unelegant. Mostly because I didn't used arrays and just "Foreach if-else"-ed everything. I think I'll learn about arrays and change it when I am done with my MCSA. If you want to array this thing, than feel free to send me a pull request.

In the end this script does a simple task with a bit to much code, but you know, when all is said and done, it makes good toast.