#####################################################################################################
# Written by Cengiz Ulusahin
# Version 1.1 | 04/02/2019
# This script will backup all Citrix VD templates (or any VM) defined in a CSV file by exporting templates as OVF files using the OVF Tool utility 
# The script will power off the templates (if powered on) before carrying out the export process
# The OVF files will be overwritten each time this script runs
# Logs will be archived in the Log-Archive folder
# The script will email log files to the user addresses defined in the variables section for verification purposes
#####################################################################################################

#Function to zip log files
Function ZipFiles($logzipfile, $logsourcedir)
{
Add-Type -Assembly System.IO.Compression.FileSystem
$compressionLevel = [System.IO.Compression.CompressionLevel]::Optimal
[System.IO.Compression.ZipFile]::CreateFromDirectory($logsourcedir,
$logzipfile, $compressionLevel, $false)
}

#Function to send logs via email 
Function Send-Logs
{
Send-MailMessage -SmtpServer "$($SMTPserver)" -To "$($SMTPto)" -From "$($SMTPfrom)" -Subject "$($region) VDI Template backup job is complete" -Body "$($region) VDI Template backup job is complete, please check attached log files!" -Attachment $($logzipfile)
}

#Modify variables below
$region = "UK"
$drive = "D:"
$backuppath = "\Template-Backups"
$SMTPserver = "smtp.domain.com"
$SMTPfrom = "email@domain.com"
$SMTPto = "emeail@domain.com"
$vcenterUsr = "user@vsphere.local"
$vcenterUsrPsw = "PASSWORD"
$vcenter = "vcenter.domain.com"
$VDC = "Datacentre"
$Folder ="VM folder"

#Save and schedule script in Windows scheduler using an account which has access to the backup path

#Do not modify following variable
$console_log = "$($drive)$($backuppath)\console-log.txt"

$(

#Connect to vCenter
Connect-Viserver $vcenter -Username $vcenterUsr -Password $vcenterUsrPsw

#Create folder structure
$ChkBkpPath = "$($drive)$($backuppath)\Backups"
$BkpFolderExists = Test-Path -PathType Container $ChkBkpPath

If ($BkpFolderExists -eq $True) {}

else {
New-Item -ItemType directory -Path "$($drive)$($backuppath)\Backups"
}

$ChkLogPath = "$($drive)$($backuppath)\Logs"
$LogFolderExists = Test-Path -PathType Container $ChkLogPath

If ($LogFolderExists -eq $True) {}

else {
New-Item -ItemType directory -Path "$($drive)$($backuppath)\Logs"
}

$ChkLogArchivePath = "$($drive)$($backuppath)\Log-Archive"
$LogArchiveFolderExists = Test-Path -PathType Container $ChkLogArchivePath

If ($LogArchiveFolderExists -eq $True) {}

else {
New-Item -ItemType directory -Path "$($drive)$($backuppath)\Log-Archive"
}

#Delete old log files
Get-ChildItem -Path "$($drive)$($backuppath)\Logs\*.*" | Remove-Item

#Do not modify following variables
$srcFile = "$($drive)$($backuppath)\VDI-templates-$($region).csv"
$templates = Import-Csv -path $srcFile
$ovftool = "$($drive)$($backuppath)\VMware OVF Tool\ovftool.exe"
$ovflogexportdir = "$($backuppath)\Logs"
$ovfexportdir = "$($backuppath)\Backups"
$date = get-date -f dd-MM-yyyy_HH-mm
$logzipfile = "$($drive)$($backuppath)\Log-Archive\logs_$($date).zip"
$logsourcedir = "$($drive)$($backuppath)\Logs"

#When testing add "--noDisks" to prevent the VMDK file from downloading each time 

foreach ($template in $templates){
& $ovftool "--X:logFile=$($ovflogexportdir)\$($template.Name).txt" "--X:logLevel=verbose" "--noDisks" "--shaAlgorithm=sha1" "--allowAllExtraConfig" "--powerOffSource" "--overwrite" "vi://$($vcenterUsr):$($vcenterUsrPsw)@$($vcenter)/$($VDC)/vm/$($Folder)/$($template.Name)" "$($ovfexportdir)"
} 

#Discconect from vCenter
Disconnect-VIServer -server $vcenter -Confirm:$false

#Zip log files
ZipFiles $logzipfile $logsourcedir

#Send logs for verification
Send-Logs

) *>&1 > "$console_log"