PowerCLI to Clone a DVS

Posted by

Scripted Operations:

  1. DVS Creation with the user provided name
  2. PortGroup Creation on the new DVS by reading the settings from the user provided existing DVS
  3. Host additions to the new DVS by reading the settings from the user provided existing DVS
  4. Migration of All but one Physical up-links to the new DVS by reading the settings from the user provided existing DVS
  5. Migration of VMs to the new DSV
  6. Migration of last  Physical up-link to the new DVS by reading the settings from the user provided existing DVS

Script Workflow:

Code:

Start-Transcript -Append -Path "$env:USERPROFILE\Documents\DVScopy.log"
$vCenterIP = Read-Host "Enter vCenter IP or Name where the operation needs to be executed"
$myDatacenter = Read-Host "Enter Datacenter Name where the operation needs to be executed"
$Cluster = Read-Host "Enter Cluster Name where the operation needs to be executed"
$NewDVS = Read-Host "Enter a Name for the New DVS"
$NumUplinks = Read-Host "Enter the number of uplink for DVS $NewDVS"
$MyVDSwitch = Read-Host "Enter the Name of Source DVS"
Connect-VIServer $vCenterIP 
#Creating new DVS 
New-VDSwitch -Name $NewDVS -Location $myDatacenter -Version "5.5.0" -NumUplinkPorts $NumUplinks
#Validation Prompt
$Execute = "No"
While ($Execute -ne "yes")
{
$Execute=Read-Host "Validate and confirm the creation of New DVS.Is the new DVS created as expected?[yes]"
}
#Preparing New PortGroup Configuration
Get-VDSwitch -Name $MyVDSwitch|Get-VDPortgroup | Export-csv -NoTypeInformation $env:USERPROFILE\Documents\ExistingsPGs.csv
$PGname = Import-Csv $env:USERPROFILE\Documents\ExistingsPGs.csv
echo "Name,Vlan,Notes,PortBinding,NumPorts" > $env:USERPROFILE\Documents\NewPGs.csv 
ForEach ($PG in $PGname)
{
 $isUplink = $PG.IsUplink
  if($isUplink -eq "False"){
  $Name = $PG.Name
 $Vlan = $PG.VlanConfiguration
 $Name += "-New"
 $Notes = $PG.Notes
 $PortBinding = $PG.PortBinding
 $NumPorts = $PG.NumPorts
 echo $Name","$Vlan","$Notes","$PortBinding","$NumPorts >> $env:USERPROFILE\Documents\NewPGs.csv
  }}
#Validation Prompt
$Execute = "No"
While ($Execute -ne "yes")
{
$Execute=Read-Host "Validate $env:USERPROFILE\Documents\NewPGs.csv and confirm execution[yes]"
}
#Replication the ProtGroup configuration to the new DVS
$NewPGs = Import-Csv $env:USERPROFILE\Documents\NewPGs.csv
ForEach ($PG in $NewPGs)
{
$Name = $PG.Name
$Vlan = $PG.Vlan
$Notes = $PG.Notes
$PortBinding = $PG.PortBinding
$NumPorts = $PG.NumPorts
if($Vlan -ne "")
{
$Vlan = $Vlan.Split(" ")[1]
Write-Host "Creating Portgroup" $Name "with VLAN ID" $Vlan
Get-VDSwitch -Name $NewDVS | New-VDPortgroup -Name $Name -VLanId $Vlan -Notes $Notes -PortBinding $PortBinding -NumPorts $NumPorts
}
else
{
Write-Host "Creating Portgroup" $Name "with No Vlan"
Get-VDSwitch -Name $NewDVS | New-VDPortgroup -Name $Name -Notes $Notes -PortBinding $PortBinding -NumPorts $NumPorts
}
}
#Validation Prompt
$Execute = "No"
While ($Execute -ne "yes")
{
$Execute=Read-Host "Validate and confirm the creation of PortGroups[yes]"
}
#Adding the Host to the new DVS by reading the host list of soruce DVS
$hostnames = Get-VDSwitch -Name $MyVDSwitch|Get-VDPort -Uplink | Select-Object -Unique ProxyHost 
$hostnames = $hostnames.ProxyHost 
$Execute = "yes"
ForEach ($hostname in $hostnames)
{
    $NicCount = (Get-VDSwitch -Name $MyVDSwitch|Get-VMHostNetworkAdapter -Physical |  Where-Object {$_.VMHost.Name -eq $hostname}).count
    if ($NicCount -lt 2)
    {
        Write-Host -ForegroundColor Red "Found host with one physical Nic only:" $hostname
        $Execute = "no"
    }
    
   Get-VDSwitch -Name $NewDVS|Add-VDSwitchVMHost -VMHost $hostname -Confirm:$false
 }

#Validation Prompt
While ($Execute -ne "yes")
{
Write-Host -ForegroundColor Red "We Found host/hosts with one physical Nic only"
Write-Host -ForegroundColor Red "Further execution may cause network outage"
$Execute=Read-Host "Validate and confirm the addtion of Host to $NewDVS.Would you like to proceed further[yes]"
}
#Move Physical Nics. All for host with 1 Nic only and N-1 for host with multiple Nics
ForEach ($hostname in $hostnames)
{
    $NicCount = (Get-VDSwitch -Name $MyVDSwitch|Get-VMHostNetworkAdapter -Physical |  Where-Object {$_.VMHost.Name -eq $hostname}).count
    if ($NicCount -eq 1)
    {     
     $vmhostNetworkAdapter = Get-VDSwitch -Name $MyVDSwitch|Get-VMHostNetworkAdapter -Physical | Where-Object {$_.VMHost.Name -eq $hostname}
     Get-VDSwitch $NewDVS | Add-VDSwitchPhysicalNetworkAdapter -VMHostNetworkAdapter $vmhostNetworkAdapter -Confirm:$false
     }
      
    if ($NicCount -eq 0)
    {
     Write-Host -ForegroundColor Red "No Physical Nic present on $MyVDSwitch for $hostname"
     }
    if ($NicCount -ge 2)
    {
     $Breakpoint =  $NicCount-1  
     $vmhostNetworkAdapters = Get-VDSwitch -Name $MyVDSwitch|Get-VMHostNetworkAdapter -Physical | Where-Object {$_.VMHost.Name -eq $hostname}
        forEach($vmhostNetworkAdapter in $vmhostNetworkAdapters)
        {
          if($Breakpoint -eq 0){break}
          Get-VDSwitch $NewDVS | Add-VDSwitchPhysicalNetworkAdapter -VMHostNetworkAdapter $vmhostNetworkAdapter -Confirm:$false
          $Breakpoint = $Breakpoint -1             
        }
    }
 }
#Validation Prompt
$Execute = "no"
While ($Execute -ne "yes")
{
Write-Host -ForegroundColor Red "Moving VMs from one Portgroup to another will lead to a brief network outage"
$Execute=Read-Host "Validate and confirm the Physical Nic placement for Hosts on $NewDVS.Would you like to proceed further with VM placement[yes]"
}
$PGname = Import-Csv $env:USERPROFILE\Documents\ExistingsPGs.csv
#Virtual Machine placement
ForEach ($PG in $PGname)
{
$isUplink = $PG.IsUplink
 if($isUplink -eq "False")
 {
    $OldNetwork = $PG.Name
    $NewNetwork = $OldNetwork+"-New"
    Get-Cluster $Cluster |Get-VM |Get-NetworkAdapter |Where {$_.NetworkName -eq $OldNetwork } |Set-NetworkAdapter -NetworkName $NewNetwork -Confirm:$false
    }
}
#Validation Prompt
$Execute = "no"
While ($Execute -ne "yes")
{
$Execute=Read-Host "Validate and confirm the Virtual Machine placement on $NewDVS.Would you like to proceed further[yes]"
}
#Move last Physical Nic from the hosts
ForEach ($hostname in $hostnames)
{
    $NicCount = (Get-VDSwitch -Name $MyVDSwitch|Get-VMHostNetworkAdapter -Physical |  Where-Object {$_.VMHost.Name -eq $hostname}).count
    if ($NicCount -eq 1)
    {     
     $vmhostNetworkAdapter = Get-VDSwitch -Name $MyVDSwitch|Get-VMHostNetworkAdapter -Physical | Where-Object {$_.VMHost.Name -eq $hostname}
     Get-VDSwitch $NewDVS | Add-VDSwitchPhysicalNetworkAdapter -VMHostNetworkAdapter $vmhostNetworkAdapter -Confirm:$false
     }
     if ($NicCount -eq 0)
    {
     Write-Host -ForegroundColor Green "No Physical Nic present on $MyVDSwitch for $hostname"
     }
    if ($NicCount -ge 2)
    {
       Write-Host -ForegroundColor Red "Found more than 1 Physical Nic present on $hostname for $MyVDSwitch. This is not expected. review the previous errors and apply manual fix as appropiate"
    }
 }
Disconnect-viserver -confirm:$false
Stop-Transcript

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.