Azure - Create VM Image and Restore VM from Image

Intro

Here is an easy way how you can simply Snapshot, “freeze” your Azure Virtual Machine and then restore it whenever you want. This can be useful for creating Virtual Machines for testing purpose.

With described process, you can still use your Virtual Machine after creating Snapshot.

Create Image from Azure Virtual Machine

Prepare you Virtual Machine

This is really important process where you prepare you Virtual machine:

  1. In the Azure portal, Connect to the virtual machine. For instructions, see How to sign in to a virtual machine running Windows Server.
  2. Open a Command Prompt window as an administrator.
  3. Change the directory to %windir%\system32\sysprep, and then run sysprep.exe.
  4. The System Preparation Tool dialog box appears. Do the following:
  • In System Cleanup Action, select Enter System Out-of-Box Experience (OOBE) and make sure that Generalize is checked. For more information about using Sysprep, see How to Use Sysprep: An Introduction.
  • In Shutdown Options, select Shutdown.
  • Click OK.

Sysprep shuts down the virtual machine, which changes the status of the virtual machine in the Azure portal to Stopped.

Create Snapshot

  1. In the Azure portal, navigate to your Virtual Machine.
  2. Select Disks on Virtual Machine menu, after selecting your Virtual Machine.
  3. Select you OS disk on the right
    'You could go directly to you disk from Azure portal
  4. Select Create snapshot command from action menu on the top right

Create_Snapshot

  1. Name your snapshot and select Create

Now you have Snapshot of your Virtual machine (Disk).

Create Image

Best way to create Image from snapshot is with powershell:

  1. Create variables
    $rgName = "myResourceGroup"
    $location = "EastUS"
    $snapshotName = "mySnapshot"
    $imageName = "myImage"
  2. Connect to Azure
    Login-AzureRmAccount
  3. Get the snapshot
    $snapshot = Get-AzureRmSnapshot -ResourceGroupName $rgName -SnapshotName $snapshotName
  4. Create the Image configuration
    $imageConfig = New-AzureRmImageConfig -Location $location
    $imageConfig = Set-AzureRmImageOsDisk -Image $imageConfig -OsState Generalized -OsType Windows -SnapshotId $snapshot.Id
  5. Create the Image
    New-AzureRmImage -ImageName $imageName -ResourceGroupName $rgName -Image $imageConfig

Image with $imageName is created and store on Azure portal.

Create/Restore Virtual Machine from Image

If you want to restore Azure Virtual Machine or create new one from Image. On “All resources” select your Image.
On up right Menu select Create VM and follow instruction like creating new Virtual Machine.

Create_VM

That’s all, now you have your “new” Virtual Machine created.

Errors

Azure Virtual Machine is not running / starting

If you have followed this article: https://docs.microsoft.com/en-us/azure/virtual-machines/windows/classic/capture-image be aware that after this process Virtual machine is not usable and you’ll get errors and Virtual Machine will not run or start.

If any of Errors below you are having there is no fixing that. Your virtual machine is not usable any more.

Set-AzureRmVMAccessExtension : Long running operation failed with status 'Failed'.
ErrorCode: VMAgentStatusCommunicationError
ErrorMessage: VM '' has not reported status for VM agent or extensions. Please verify the VM has a running VM agent, and can establish outbound connections to Azure storage.
StartTime: 8/1/2017 12:41:40 PM
EndTime: 8/1/2017 1:07:06 PM
OperationID: 54486c40-20b6-4a97-be62-b4fcf23a68d0
Status: Failed
At line:1 char:1
+ Set-AzureRmVMAccessExtension -ResourceGroupName "" -VMName ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : CloseError: (:) [Set-AzureRmVMAccessExtension], ComputeCloudException
    + FullyQualifiedErrorId : Microsoft.Azure.Commands.Compute.SetAzureVMAccessExtensionCommand