Script to Checkpoint Hyper-V VMs

[RowlandoGloom]

I'm not sure whether anybody's interested, however I have a few problematic VMs which I don't want to rebuild. Every now and then Windows gets messed up and I have to restore it from a checkpoint.

 

I've created a powershell script which runs on the Hyper-V host as a scheduled task to backup the VMs every morning. This will run whether the VM is powered on or off, but not suspended.

 

 

 

 

function backup([string]$virtualMachine) {

 

# Assemble VM Details

$virtualMachineDetails= Get-VM -ComputerName $HyperVHost -Name $VirtualMachine

 

Write-Host "Creating snapshot of $virtualMachine"

$dateDisplayFormat = Get-Date -Format yyyy.MM.dd

$timeDisplayFormat = Get-Date -Format HH.mm.ss

 

$snapshotName = $virtualMachineDetails.Name + ": " + $dateDisplayFormat + " " + $timeDisplayFormat

 

CheckPoint-VM -ComputerName $HyperVHost -Name $virtualMachine -Snapshotname $snapshotName

 

Write-Host "Snapshot of $virtualMachine complete"

}

 

$HyperVHost = "hostname.domain.loc"

 

backup -virtualMachine "VirtualMachineName1"

backup -virtualMachine "Some Other Virtual Machine"

backup -virtualMachine "And maybe a third"

 

 

 

 

Obviously replace the bottom 4 lines with your own details.

 

Save it as c:\createCheckpoints.ps1

 

In task scheduler, create a task to run "powershell.exe" and in the arguments add "-File c:\createCheckpoints.ps1". Make sure the task is set to run whether there's a user logged on or not.

 

This will create a checkpoint every time the script runs so I don't forget to. I'm going to add a bit in to get rid of snapshots over * days old, but will stick with manually deleting the, for now.

[IanT]

What do you messed up?

 

What are the VMs doing?

[RowlandoGloom]

VMs starting up to a black screen occasionally when they're rebooted:

 

http://www.edugeek.net/forums/windows-server-2012/157235-black-logon-screen.html#post1350942