Einfaches Powershell Script zum Backup aller HyperV virtuellen Maschinen auf NAS Freigabe

# ErrorHandling
$Error.clear()

# Temporary Backup Path
$BackupRoot = "C:\Export\"  
# Backup Target on the NAS
$BackupTarget = "\\192.168.108.100\Backup\HyperV\"  
# Days the backup shall be kept
$Limit = (Get-Date).AddDays(-2)

$BackupPath = $BackupRoot + "BCK-" + (get-date).toString('yyyy-MM-dd')  

#Export All VMs on the server
Get-VM | Export-VM –Path $BackupPath

if ($Error.Count -eq 0) {
    # Delete files older than the $limit.
    Get-ChildItem -Path $BackupTarget -Recurse -Force | Where-Object { !$_.PSIsContainer -and $_.CreationTime -lt $Limit } | Remove-Item -Force

    # Delete any empty directories left behind after deleting the old files.
    Get-ChildItem -Path $BackupTarget -Recurse -Force | Where-Object { $_.PSIsContainer -and (Get-ChildItem -Path $_.FullName -Recurse -Force | Where-Object { !$_.PSIsContainer }) -eq $null } | Remove-Item -Force -Recurse
}

# Move the backup folders to the nas
Move-Item $BackupPath $BackupTarget -Force -ErrorAction Stop