#create-managed-disk-from-snapshot
#Provide the name of your resource group
$resourceGroupName ='APP-RG'
#Provide the name of the snapshot that will be used to create Managed Disks
$snapshotName = 'West_Europe_AppVer2021_10_0_21_2021-oct-19'
$dt =  Get-Date -Format "MM-dd-yyyy_HH-mm-ss"
#Provide the name of the Managed Disk
$diskName = 'RegressionAppSrvOsDisk_'+$dt
#Provide the size of the disks in GB. It should be greater than the VHD file size.
$diskSize = '128'
#Provide the storage type for Managed Disk. PremiumLRS or StandardLRS.
$storageType = 'Premium_LRS'
#Get-AzLocation
$location = 'westeurope'
$snapshot = Get-AzSnapshot -ResourceGroupName $resourceGroupName -SnapshotName $snapshotName
$diskConfig = New-AzDiskConfig -SkuName $storageType -Location $location -CreateOption Copy -SourceResourceId $snapshot.Id -DiskSizeGB $diskSize
New-AzDisk -Disk $diskConfig -ResourceGroupName $resourceGroupName -DiskName $diskName
$disk = Get-AzDisk -ResourceGroupName $resourceGroupName -DiskName $diskName
# swap-os-disk-of-an-azure-vm
$vmName = 'Auto-Regression-App-Server'
# Get the VM
$vm = Get-AzVM -ResourceGroupName $resourceGroupName -Name $vmName
# Make sure the VM is stopped\deallocated
$stoppedVm =Stop-AzVM -ResourceGroupName $resourceGroupName -Name $vm.Name -Force
# Get the new disk that you want to swap in
$disk = Get-AzDisk -ResourceGroupName $resourceGroupName -Name $diskName
# Set the VM configuration to point to the new disk
$setNewDisk =Set-AzVMOSDisk -VM $vm -ManagedDiskId $disk.Id -Name $disk.Name
# Update the VM with the new OS disk
$updatedVm = Update-AzVM -ResourceGroupName $resourceGroupName -VM $vm
# Start the VM
$startedVm = Start-AzVM -Name $vm.Name -ResourceGroupName $resourceGroupName