Revert to Azure Managed Disk snapshot on Azure VM

Darrell Lowrance
Copper Contributor
Sep 13, 2018
Yes, I've seen it. However, in order to revert back to the VM's original state, you must delete the original VM, then create a new VM from the snapshot by running a PS script and manually entering many required parameters.

https://docs.microsoft.com/en-us/azure/virtual-machines/scripts/virtual-machines-windows-powershell-sample-create-vm-from-snapshot?toc=%2fpowershell%2fmodule%2ftoc.json

This process seems awfully involved, even risky and prone for mistakes.

What we're looking for is something similar to VMWare where you can take a quick snapshot just before making changes to the VM (e.g. upgrade the OS/apps, make config changes, etc). If something fails, you can easily revert back to the VM's original Snapshot state by simple clicking a button.

Thanks for considering.
- Ravi shankar Nallasamy
  Copper Contributor
  Oct 24, 2018
  Hope this helps,
  
  https://www.francoisdelport.com/2017/12/creating-and-restoring-azure-virtual-machine-snapshots-for-managed-disks/
- Tom Harvey
  Copper Contributor
  Sep 19, 2018
  First off - sorry for the late response. I've had a lot of requests for this script so hopefully it helps.
  
  Here's the scripts we use. We do it slightly differently to the Microsoft docs by retaining the original components, nic / pip etc. Its also tailored to allow for one data disk as an automatic restore. You can amend as suits.
  
  I'm sure this could be refined more but it does what we need it to.
  
  #Update Variables
  $location = "Location" #Update if required
  $resourceGroupName = "ResourceGroupName" #Update if required
  $vmName = "VMName" #Update VMName
  $diagStorageAcc = "DiagStorageAcct" #Update if required
  $snapshotName = "OSDiskSnapshotNAme" #Update OS Disk SnapshotName
  $DataSnapshotName = "DataDiskSnapshotName" #Update Data Disk SnapshotName
  $vmSize = 'VMSize' #Update if required
  
  #Get Target VM
  $vm = Get-AzureRMVM -ResourceGroupName $resourceGroupName -Name $vmName
  #Shutdown the target VM
  Stop-AzureRmVM -ResourceGroupName $resourceGroupName -Name $vmName -Force
  
  #Get existing NIC to use during re-create
  $NicID = $vm.NetworkProfile.NetworkInterfaces.Id
  $VmId = $vm.VmId #Gets and sets VMId - Used to remove the diagnostics storage account.
  
  #Get Boot Diagnostic storage container to be deleted
  Set-AzureRmCurrentStorageAccount –ResourceGroupName $resourceGroupName –StorageAccountName $diagStorageAcc
  $diagContainer = Get-AzureStorageContainer | Where-Object { $_.Name -like "*$VmId" }
  
  #Get Managed OS Disk if Exists
  $ManagedDiskName = $vm.StorageProfile.OsDisk.Name
  $ManagedDisk = Get-AzureRMDisk -ResourceGroupName $resourceGroupName -DiskName $ManagedDiskName
  
  #Get Managed Data Disk if Exists
  $ManagedDataDiskName = $vm.StorageProfile.DataDisks.Name
  If ($ManagedDataDiskName) {
  $ManagedDataDisk = Get-AzureRMDisk -ResourceGroupName $resourceGroupName -DiskName $ManagedDataDiskName
  }
  
  #Remove VM
  Remove-AzureRMVM -ResourceGroupName $resourceGroupName -Name $vmName -Force
  
  #Remove boot Diagnostics storage
  If ($diagContainer.Name) {
  Remove-AzureStorageContainer -Name $diagContainer.Name -Force
  }
  
  #Remove and Re-Create Managed OS Disk
  If ($ManagedDisk) {
  Remove-AzureRMDisk -ResourceGroupName $resourceGroupName -DiskName $ManagedDiskName -Force
  #Create New Disk Procedure
  $snapshot = Get-AzureRmSnapshot -SnapshotName $snapshotName -ResourceGroupName $resourceGroupName
  $snapshotID = $snapshot.Id
  $diskConfig = New-AzureRmDiskConfig -AccountType Standard_LRS -Location $location -CreateOption Copy -SourceResourceId $snapshotID
  $diskName = "$vmName-osdisk"
  $NewDisk = New-AzureRmDisk -DiskName $diskName -Disk $diskConfig -ResourceGroupName $resourceGroupName
  }
  
  #Remove and Re-Create Managed Data Disk
  If ($ManagedDataDiskName) {
  Remove-AzureRMDisk -ResourceGroupName $resourceGroupName -DiskName $ManagedDataDiskName -Force
  #Create New Disk Procedure
  $DataSnapshot = Get-AzureRmSnapshot -SnapshotName $DataSnapshotName -ResourceGroupName $resourceGroupName
  $DataSnapshotID = $DataSnapshot.Id
  $DataDiskConfig = New-AzureRmDiskConfig -AccountType Standard_LRS -Location $location -CreateOption Copy -SourceResourceId $DataSnapshotID
  $DataDiskName = "$vmName-datadisk"
  $NewDataDisk = New-AzureRmDisk -DiskName $DataDiskName -Disk $DataDiskConfig -ResourceGroupName $resourceGroupName
  }
  
  #Create New VM Procedure
  $Newvm = New-AzureRmVMConfig -VMName $vmName -VMSize $vmSize
  $Newvm = Add-AzureRmVMNetworkInterface -VM $Newvm -Id $NicID
  $osDisk = Get-AzureRMDisk -ResourceGroupName $resourceGroupName -DiskName $diskName
  $Newvm = Set-AzureRmVMOSDisk -VM $Newvm -Name $diskName -ManagedDiskId $osDisk.Id -CreateOption Attach -Windows -Caching ReadWrite
  If ($ManagedDataDiskName) {
  $dataDisk = Get-AzureRMDisk -ResourceGroupName $resourceGroupName -DiskName $DataDiskName
  $Newvm = Add-AzureRmVMDataDisk -VM $Newvm -Name $DataDiskName -CreateOption Attach -ManagedDiskId $dataDisk.Id -Lun 0 -Caching ReadOnly
  }
  New-AzureRmVM -ResourceGroupName $resourceGroupName -Location $location -VM $Newvm
  
  Echo "****************************Complete****************************************"

Forum Discussion

Revert to Azure Managed Disk snapshot on Azure VM

Have you guys seen this? but this only available in Managed Disk

https://docs.microsoft.com/en-us/azure/virtual-machines/linux/snapshot-copy-managed-disk

Use Azure portal

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