Get-Clusternode error

Question

I've just started in the world of Powershell and I'm writing a simple script to put hosts in maintenance mode, apply patches, reboot, then put back into server. I decided to use the failover clustering service to check the host's availability before placing back into service. But I seem to be getting an error which I can't find much about.

Get-ClusterNode : Cannot convert 'hyperv1.example.com' to the type     'System.Collections.Specialized.StringCollection' required by parameter 'Name'. Unable to cast object of type 'System.Management.Automation.PSObject' to type 'System.String'.

The Code I have is:

$VMMServer = Get-VMMServer -ComputerName "scvmm.example.com"
$Cluster = "HyperVCluster"
$VMHosts = Get-VMHost -VMHostCluster $Cluster
Foreach ($VMHost in $VMHosts) {
psexec \\$VMHost -s wuinstall /reboot /install
sleep 120
$Status = Get-Clusternode -Cluster $Cluster -name $VMHost | select state
function CheckHostStatus {
if ($Status -match "Up") {
Write-Host "Host is Up"
Write-Host "Placing host" $VMHost "back into service."
    Enable-VMHost $VMHost
                        }
elseif ($Status -match "Down") {
Write-Host "Host is still rebooting"
sleep 120
CheckHostStatus
}
                    }
CheckHostStatus
}

Answer 1

Get-VMHost returns "VMHost[]" as a type.

So each VMHost returned is a custom, structured type, not a simple string.

My understanding is that the VM-Host structure is as such (I don't have the PS VM add-ons installed here to double check):

• State
• CustomFields
• ID
• Name

So perhaps try using $VMHost.Name when you just want the (string) name of the current VMHost:

$Status = Get-Clusternode -Cluster $Cluster -name $VMHost.Name | select state

Write-Host "Placing host " + $VMHost.Name + " back into service."