DSC Script Resource to set DNS Client Servers on any active IPv4 Interface

DSC_Script_DnsClientServers.ps1

# This Script Resource is required because not all EC2 Instance types end up with "Ethernet" as the primary adapter, some are "Ethernet 2" etc
Script SetDnsClientServers {
    TestScript = {
        $CurrentdnsServers = (Get-NetAdapter | Where-Object Status -eq "Up").InterfaceIndex | ForEach-Object {
            (Get-DnsClientServerAddress -InterfaceIndex $_ | Where-Object AddressFamily -eq 2).ServerAddresses 
            # AddressFamily is type UINT16, IPv4 equals 2
        }
        if($CurrentdnsServers.count -lt 2){Return $false}
        if(($CurrentdnsServers -like $using:DnsServer1) -and ($CurrentdnsServers -like $using:DnsServer2)) {
            Return $true
        }Else {
            Return $false
        }
    }
    SetScript = {
        (Get-NetAdapter | Where-Object Status -eq "Up").InterfaceIndex | ForEach-Object {
            Get-DnsClientServerAddress -InterfaceIndex $_ | Where-Object AddressFamily -eq 2 | Set-DnsClientServerAddress -ServerAddresses $using:DnsServer1,$using:DnsServer2
        }
    }
    GetScript = {
        @{ Result = (Get-NetAdapter | Where-Object Status -eq "Up").InterfaceIndex | ForEach-Object {(Get-DnsClientServerAddress -InterfaceIndex $_ | Where-Object AddressFamily -eq 2).ServerAddresses} } 
    }
}