PowerShell: Duplicate Port Groups from one vDS to another using PowerCLI

Duplicate-PortGroups.ps1

#requires -version 3
<#
.SYNOPSIS
  Copies port groups and all of their settings from one vDS to another vDS

.DESCRIPTION
  This script is used to duplicate port groups (and their settings) from one vDS to another vDS.
  This is useful if you want to create a duplicate vDS with the same configuration as the original

.PARAMETER
    None

.INPUTS
  Input.csv file. This file contains the list of port groups you want to duplicate and their new name (as you cannot have two port groups with the same name even in different vDS)

.OUTPUTS
  Log file stored in C:\Windows\Temp\Duplicate-PortGroups.log

.NOTES
  Version:        1.0
  Author:         Luca Sturlese
  Creation Date:  13.01.2015
  Purpose/Change: Initial script development

.EXAMPLE
  Duplicate-PortGroups.ps1
#>

#---------------------------------------------------------[Initialisations]--------------------------------------------------------

#Set Error Action to Silently Continue
$ErrorActionPreference = "SilentlyContinue"

#Dot Source required Function Libraries
. "C:\Scripts\Functions\Logging_Functions.ps1"

#Add VMware PowerCLI Snap-Ins
Add-PSSnapin VMware.VimAutomation.Core

#----------------------------------------------------------[Declarations]----------------------------------------------------------

#Script Version
$sScriptVersion = "1.0"

#Log File Info
$sLogPath = "C:\Windows\Temp"
$sLogName = "Duplicate-PortGroups.log"
$sLogFile = Join-Path -Path $sLogPath -ChildPath $sLogName

#Global Variables
$Global:Data
$Global:dvNewName

#-----------------------------------------------------------[Functions]------------------------------------------------------------

Function Connect-VMwareServer{
  Param([Parameter(Mandatory=$true)][string]$VMServer)

  Begin{
    Log-Write -LogPath $sLogFile -LineValue "Connecting to VMware environment [$VMServer]..."
  }

  Process{
    Try{
      $oCred = Get-Credential -Message "Enter credentials to connect to vSphere Server or Host"
      Connect-VIServer -Server $VMServer -Credential $oCred
    }

    Catch{
      Log-Error -LogPath $sLogFile -ErrorDesc $_.Exception -ExitGracefully $True
      Break
    }
  }

  End{
    If($?){
      Log-Write -LogPath $sLogFile -LineValue "Completed Successfully."
      Log-Write -LogPath $sLogFile -LineValue " "
    }
  }
}

Function Read-Input{
  Param()

  Begin{
    Log-Write -LogPath $sLogFile -LineValue "Reading csv to collect required data..."
  }

  Process{
    Try{
      #Collect info from CSV file
      $FilePath = Join-Path -Path $PSScriptRoot -ChildPath Input.csv
      $Global:Data = Import-Csv -Path $FilePath

      #Collect new dvSwitch name
      $Global:dvNewName = Read-Host "What is the name of the new vDS?"
    }

    Catch{
      Log-Error -LogPath $sLogFile -ErrorDesc $_.Exception -ExitGracefully $True
      Break
    }
  }

  End{
    If($?){
      Log-Write -LogPath $sLogFile -LineValue "Completed Successfully."
      Log-Write -LogPath $sLogFile -LineValue " "
    }
  }
}

Function Create-PortGroup{
  Param()

  Begin{
    Log-Write -LogPath $sLogFile -LineValue "Duplicating port groups..."
  }

  Process{
    Try{
      ForEach($Row in $Global:Data){
        $PG = Get-VDPortgroup -Name $Row.orig
        Get-VDSwitch -Name $Global:dvNewName | New-VDPortgroup -Name $Row.new -ReferencePortgroup $PG
        Log-Write -LogPath $sLogFile -LineValue "  $($Row.new) - Created"
      }
    }

    Catch{
      Log-Error -LogPath $sLogFile -ErrorDesc $_.Exception -ExitGracefully $False
    }
  }

  End{
    If($?){
      Log-Write -LogPath $sLogFile -LineValue "Completed Successfully."
      Log-Write -LogPath $sLogFile -LineValue " "
    }
  }
}

#-----------------------------------------------------------[Execution]------------------------------------------------------------

Log-Start -LogPath $sLogPath -LogName $sLogName -ScriptVersion $sScriptVersion
$Server = Read-Host "Specify the vCenter Server to connect to (IP or FQDN)?"
Connect-VMwareServer -VMServer $Server
Read-Input
Create-PortGroup
Log-Finish -LogPath $sLogFile