Invalid value in DNS parameter: "System.String[]"

mk_ultra — Mon, 15 May 2023 13:33:38 GMT

Hello, I am trying to dynamically set a host's DNS server to the local domain controller in the cluster. It sounds like this may just be an object type error? It works when I set the $DNSServer variables to a "[ip address]". What is the difference between a String[] and a System.String[] ?

$DomainController = Get-Cluster $ClusterName | Get-VM | Where-Object {$_.Name -like "*999"}

$DomainControllerIP = $DomainController.Guest.IPAddress

$DNSServer1 = $DomainControllerIP

$DNSServer2 = "[redacted]"

$VMHostNetwork = Get-VMHostNetwork -Host $IPAddress

Set-VMHostNetwork -Network $VMHostNetwork -DomainName $SearchDomain -SearchDomain $SearchDomain -HostName $HostName -DNSAddress $DNSServer1, $DNSServer2 -DnsFromDhcp:$false

Full error:

Set-VMHostNetwork : 5/15/2023 8:29:43 AM Set-VMHostNetwork Invalid value in DNS parameter: "System.String[]"
+ ... Set-VMHostNetwork -Network $VMHostNetwork -DomainName $Se ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [Set-VMHostNetwork], InvalidArgument
+ FullyQualifiedErrorId : Core_SetVmHostNetwork_TryValidateParameterList_InvalidDNSName,VMware.VimAutomation.ViCore.Cmdlets.Commands.Host.SetVMHostNetwork

Re: Invalid value in DNS parameter: "System.String[]"

LucD — Mon, 15 May 2023 14:17:57 GMT

Did you check that $DomainControllerIP is a String and not an array of Strings?

Re: Invalid value in DNS parameter: "System.String[]"

mk_ultra — Mon, 15 May 2023 14:46:41 GMT

This is indeed the answer. How can I tell that it's an array when it only outputs 1 item?

Re: Invalid value in DNS parameter: "System.String[]"

LucD — Mon, 15 May 2023 14:52:48 GMT

You can use the GetType() method

$DomainControllerIP.GetType()

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Invalid value in DNS parameter: "System.String[]"

Re: Invalid value in DNS parameter: "System.String[]"

Re: Invalid value in DNS parameter: "System.String[]"

Re: Invalid value in DNS parameter: "System.String[]"