Get-PowerShell » Managing Hyper-V with WMI

Jun 12 2008

Managing Hyper-V with WMI

Posted by: Andy Schneider in Hyper-V, Powershell

Dung K Hoang has an excellent series of blog posts on how to manage Hyper-V with WMI.

I have taken a couple of his scripts and built a function that takes input from the pipeline and gives me an object that has three properties, a HostServer, VirtualMachine, and a Switch.

function Get-HyperVInfo {
    begin {
        $VmSwitchinfo = @();
    }
    process {
        $computer = $_
        $ListofVMs = gwmi -namespace root\virtualization Msvm_ComputerSystem -filter "ElementName <> Name" -computer $computer
        $ListofSwitches = gwmi -namespace root\virtualization Msvm_VirtualSwitch -computer $computer
        $ListofSwitchPorts = gwmi -namespace root\virtualization Msvm_SwitchPort  -computer $computer
        foreach ($Switch in $ListofSwitches)
{
            $SwitchGUID = $Switch.Name
            $SwitchDisplayName = $Switch.ElementName
            $PortsOnSwitch = $ListofSwitchPorts | where {$_.SystemName -match $SwitchGUID} 
  
            foreach ($Port in $PortsOnSwitch)
{
                $PortPath = $Port.__PATH
                $ListofConnections = gwmi -namespace root\virtualization Msvm_ActiveConnection -computer $computer
                $a = $ListofConnections | where {$_.Antecedent -like $PortPath}
                if ($a -ne $NULL)
{
                    $LANEndPoint = $a.Dependent 
                    foreach ($VM in $ListofVMs)
{
                        $VMGUID = $VM.Name
                        $VMDisplayName = $VM.ElementName
                        if ($LanEndPoint -like "*$VMGUID*")
{
  
                            $vminfo = "" |Select-Object VirtualMachine ,HostServer, switch
                            $vminfo.Switch = $SwitchDisplayName
                            $vminfo.VirtualMachine = $VMDisplayName
                            $vminfo.HostServer = $_
                            $vmswitchinfo += $vminfo
  
                        }
                    }
                }
            }
        } 
  
  
    }
    end {
    $vmswitchinfo
    }
}

To use this function you can just do something like this

“HVSERVER1″,”HVSERVER2″,”HVSERVER3″ | Get-HypervInfo

I have used this script to get a bunch of information on all the VM’s in my Hyper V Cluster. Note that this is just using WMI so I can query my Server Core machines that are running Hyper V.

Many Many thanks to Dung for this info. I would not have even been able to get started without his help.

This entry was posted on Thursday, June 12th, 2008 at 6:31 am and is filed under Hyper-V, Powershell. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.