Powershell Script to Backup Hyperv VM

This powershell Script backups the VM to Synology WORM shared Folder

Start-Transcript -Path C:\Scripts\vmbackuplog.log -Append
[Net.ServicePointManager]::SecurityProtocol = "tls12, tls11, tls"
# Set your Hyper-V virtual machine name
$VMName = "test-vm"

try{

    # Check if a folder name exists in the local drive
    if (Test-Path -Path D:\TempVmBackup){
        # Set the local export folder path
        $LocalExportFolder = "D:\TempVmBackup"
    }
    else{
        # create a local folder to export the VM
        New-Item -ItemType Directory -Path D:\TempVmBackup | Out-Null
        # Set the local export folder path
        $LocalExportFolder = "D:\TempVmBackup"
    }

    # Set the shared folder path
    $SharedFolderPath = "\\aaa.bbb.ccc.ddd\WORM-VM-Backup\"+$VMName

    # Deleting Backups older Than 7 days in the NAS
    Get-ChildItem -Path $SharedFolderPath -Recurse -File | Where CreationTime -lt  (Get-Date).AddDays(-7)  | Remove-Item -Force

    # Step 1: Shutdown the Hyper-V virtual machine
    Write-Host "Shutting down $VMName..."
    Stop-VM -Name $VMName -Force

    # Step 2: Export the virtual machine to a local directory
    Write-Host "Exporting virtual machine to local directory..."
    Export-VM -Name $VMName -Path $LocalExportFolder

    # Step 3: Start the Hyper-V virtual machine
    Write-Host "Starting $VMName..."
    Start-VM -Name $VMName

    # Step 4: Compress the local export folder using 7-Zip
    Write-Host "Compressing local export folder using 7-Zip..."
    $ZipFileName = Join-Path $LocalExportFolder ($VMName + "-"+(Get-Date -Format "ddMMyyyy_HHmmss")+".7z")
    & "C:\Program Files\7-Zip\7z.exe" a -t7z $ZipFileName $LocalExportFolder

    # Step 5: Copy the exported 7z file to the backup folder
    Write-Host "Copying virtual machine 7z file to shared folder..."
    Copy-Item -Path $ZipFileName -Destination $SharedFolderPath -Force

    # Step 6: Delete the local export and 7z file
    Write-Host "Deleting local export and 7z file..."
    Remove-Item -Path $LocalExportFolder -Recurse -Force 

    Write-Host "Backup completed successfully."

    }
catch
{
    Write-Host "An Error Has occured Please see the log file"
    # Push notification 
    $msg = "Error has occured while backing up VM: "+$VMName
    $Request = @{
              Method = "POST"
              URI = "https://ntfy.sh/YOUR TOPIC ID"
              Headers = @{
                            Title = "VM Backup"
                            Priority = "urgent"
                            Tags = "warning,daily-backup"
                         }
            Body = $msg
                }
    Invoke-RestMethod @Request
}
Finally{
    Stop-Transcript
}