hyperv-vm-export.ps1

$ErrorActionPreference = "Stop"

function Log {
    param (
        $m
    )
    Write-Output "$("[{0:yyyy/MM/dd} {0:HH:mm:ss}]" -f (Get-Date)) $m"
}

$exportFolder = "D:\VM Exports"

function ExportVM {
    param (
        $vmName
    )

    $exportVMFolder = "$exportFolder\$vmName"
    $backupFolder = "\\192.168.1.1\Backup\VM Exports\$vmName-$(Get-Date -Format "yyyy-MM-dd-HH-mm")"

    Log "Using the following: `n Export Folder:    $exportFolder `n Export VM Folder: $exportVMFolder `n Backup Folder:    $backupFolder `n"

    if (Test-Path -Path $exportVMFolder) {
        Log "Deleting temp export folder that still exists..."
        Remove-Item -Path $exportVMFolder -Force -Recurse
        Log "Delete finished"
    }

    Log "Starting export to temp directory..."

    $ExportJob = Export-VM -Name $vmName -Path "$exportFolder\" -AsJob;
    
    sleep(10)

    while ($ExportJob.State -eq "Running" -or $ExportJob.State -eq "NotStarted") {
        Log "[Export $vmName] $($ExportJob.Progress.PercentComplete)% complete"
        sleep(30)
    }

    if ($ExportJob.State -ne "Completed") {
        Write-Error "Export Job did not complete: $($ExportJob.State)"
        throw $ExportJob.Error
    }

    Log "Export finished."

    Log "Starting copy to backup server..."
    # Robocopy:
    # /j - Copies using unbuffered I/O (recommended for large files).
    # /e - Copies subdirectories. This option automatically includes empty directories.
    # /eta - Show ETA of each file being copied.
    # /np - Do not show percentage.
    # /v - Verbose.
    robocopy /j /e /eta /np /v $exportVMFolder $backupFolder
    Log "Copy finished."

    Log "Deleting temp export folder..."
    Remove-Item -Path $exportVMFolder -Force -Recurse
    Log "Delete finished"
}

ExportVM "Test VM"