SCCM Auto Snapshot a VM before Patching Task Sequence – PowerCLI

A while ago I mentioned in a post about creating a bespoke patching task sequence for a client who wanted to snap shot every VM before patching. To do this I created a silent install wrapper for PowerCLI using PowerShell.

Anyway, as per the request… here is the script I used to snapshot a VM before patching it during the Task sequence. It must be run as a command line step and using an account that has access to VSphere.
 

########################################################################################################################
#Author:       SCCMOG - Richie Schuster - SCCMOG.COM                                                                   #
#Date:         05/01/2017                                                                                              #
#Name:         Auto Snapshot VM before Patching                                                                        #
#RunAs CMD:    Powershell.exe -Executionpolicy Bypass -File PrePatchSnapShot.ps1                                       #
#Description:  This script has been created to auto snapshot a VM before patching by a task sequence from SCCM.        #
#              The script must be run as a Command Line in the task sequence by an account with access to VSphere.     #
########################################################################################################################

#Variables
$VMname = "$env:COMPUTERNAME.YOURDOMAIN.COM"
$VIserver = "YOURVISERVER.YOURDOMAIN.COM"
#$Username = "YourDomain\admin-SCCMOG"
#$Password = "CrazyPass"

#Create Credential to pass securely
#$Cred = New-Object System.Management.Automation.PSCredential($Username, (ConvertTo-SecureString $Password -AsPlainText -Force))

#Add the VMware snapin if not added
If ((Get-PSSnapin -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue) -eq $null ) {
    Add-PSSnapin VMware.VimAutomation.Core
    }

#Connect to VIC001
If ($global:DefaultVIServer -eq $null ) {
    Connect-VIServer -Server $VIserver #-Credential $Cred -Verbose
    }
ElseIF ($global:DefaultVIServer -ne $VIserver ) {
    #Disconnect all server connections
    Disconnect-VIServer -Server $global:DefaultVIServers -Force -Confirm:$false -WarningAction SilentlyContinue -ErrorAction SilentlyContinue | Out-Null
    #Re-connect to specific server
    Connect-VIServer -Server $VIserver
    }

#Reset Connected Variable
$Connected = $global:DefaultVIServer.Name -eq $VIserver

If ($Connected -eq $true) {

    #Snapshot Time
    #Time Date for Snapshot name
    $Date = Get-Date
    $DateShort = $Date.ToShortDateString() -replace '[/]'
    $TimeShort = $Date.ToShortTimeString()
    $Snapshotname = "Before Patching $TimeShort $DateShort"

    #Take Snapshot
    New-Snapshot -VM $VMname -Name $Snapshotname -Description "This Snapshot was taken before patching the VM from the SCCM TaskSequence. $Date" -Verbose

    #Check Snapshot complete
    $SnapShots = Get-Snapshot -VM $VMname
    $Taken = $Snapshots.Name.Contains($Snapshotname)
    
    #If found Disconnect and Exit Script Success 0
    If ($Taken -eq $true) {
        Disconnect-VIServer -Server $VIserver -Force -Confirm:$false -WarningAction SilentlyContinue -ErrorAction SilentlyContinue | Out-Null
        Exit 0
        }
    #If Failed Exit Script 999 Failing the Tasksequence
    Else {
    Exit 999
    }
}

Elseif ($Connected -eq $false) {
    Exit 911
    }
Else {
    Exit 912
    }
    
######################################################################################################################