# **************************************************
#    XS-DeleteSnapshotByTag.ps1
#
#    Author: Urs Heeb
#    Create: 27.03.2020
#
#    Note:   Enumerate all VMs with a specific Tag
#            and delete assigned snapshots
#
#    Change: 27.03.2020 / uh / Script created
#            28.03.2020 / uh / Script modified for blog
#
# **************************************************

# Import SDK
Import-Module XenServerPSModule

# Define Variables
$Xenhost = "192.168.199.210"
$XenUser = "root"
$XenPW = "PITPassword"
$XenTag = "Citrix"


# Connect to Citrix Hypervisor
# Try the defined host otherwise change to new PoolMaster
# --- Base scriptlet from pastebin.com ---

Try {
    $Session = Connect-XenServer -Url https://$Xenhost -UserName $XenUser -Password $XenPW -NoWarnCertificates -SetDefaultSession
    Write-Host -ForegroundColor DarkGreen "Successful connected to $Xenhost"
    }
    Catch [XenAPI.Failure]
        {
        [string]$PoolMaster = $_.Exception.ErrorDescription[1]  
        Write-Host -ForegroundColor Red "$($Pools.$Pool) is slave, Master was identified as $PoolMaster, trying to connect"
        $Pools.Pool = $PoolMaster
        $Session = Connect-XenServer -url "http://$PoolMaster" -UserName $XenUser -Password $XenPW -NoWarnCertificates -SetDefaultSession
        Write-Host -ForegroundColor DarkGreen "Successful connected to $PoolMaster"
       }


# Enumerate all Snapshots
# --- Base scriptlet from pastebin.com ---
# Only snapshots of VMs with the tag defined in the variables

#Get-XenVM |  Where {$_.is_a_snapshot -eq $True -and $_.tags -contains $XenTag}  | select name_label
$BkpVMs2 = Get-XenVM |  Where {$_.is_a_snapshot -eq $True -and $_.tags -contains $XenTag}


# Delete snapshot of each VM found before
# --- Base scriptlet from pastebin.com ---
# Loop added to remove all snapshots found before

$BkpVMs2 | ForEach-Object {
    $Snapshotname2 = $_.name_label
    Write-Host -ForegroundColor DarkYellow "Snapshot with name $Snapshotname2 will be deleted"
    Remove-XenVM -Name $Snapshotname2
    }