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Help with PowerShell script - List server DNS servers

I need some assistance with a PowerShell script in SAM.

The intent of the script is to query a server and get its DNS servers so I can eventually run a report on them.

The script I have cobbled together works but not correctly. It shows status as Unknown.

Here is the current script and results:

# Declare variables

$ThingWeAreCheckingToExist = @(Get-WmiObject -computername $args[0] -credential ${credential} -Namespace root\cimv2 -Query "Select dnsserversearchorder from win32_networkadapterconfiguration" | where {$_.DNSServerSEarchOrder -ne $null} | select -ExpandProperty DNSServerSearchOrder)

if($ThingWeAreCheckingToExist.Length -ge 0){

# this will return true if $ThingWeAreCheckingToExist contains a system (IP)

for($index = 0; $index -lt $ThingWeAreCheckingToExist.length; $index++){

# this will iterate through the different systems found in the array

# generate your output now including $index

Write-Host "Statistic $($index)"

Write-Host "Message $($index): $($ThingWeAreCheckingToExist[$index])"

}

# Close out the script

Exit 0;

-------------------------------------

Results:

Output Result:

ND Get Output Failed:Output: ==============================================

Statistic 0

Message 0: 1xx.xx.x.xx

Statistic 1

Message 1: 1xx.xx.x.xx

Statistic 2

Message 2: 1xx.xx.x.xx

Statistic 3

Message 3: 1xx.xx.x.xx

Can anyone get me straightened out?

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Accepted answers

All comments

christopher.t.jones123

I think you're missing a colon after the word "statistic" in the script

mesverrum

On the edit template screen you need to click the edit script button and then test it from there, then it will run the script and see the various outputs and it saves them. It's kind of a weird requirement but hopefully you will see what I'm trying to describe.

jangliss

The output format should be:

Message.Index: text

Statistic.Index: 123

"Index" doesn't have to be numeric either, it can be text. So you could have:

Message.DNS1: 1.1.1.1

Statistic.DNS1: 1

Messge.DNS2: 8.8.8.8

Statistic.DNS2: 1

One gotcha with dynamic lengths is the potential for the number of results returned to be different than what the template test showed, resulting in an error later on when the script runs and finds 3 DNS servers, when your test only returned too.

Don't forget your exit statements. If you are testing your servers for specific values, you can use the exit code to change the state of check from "ok" (0) to warning/critical. For example:

$expectedDNS = @(';192.168.35.1', '1.1.1.1')$actualDNS = @(Get-WmiObject -computername $args[0] -credential ${credential} -Namespace root\cimv2 -Query "Select dnsserversearchorder from win32_networkadapterconfiguration" | where-object {$_.DNSServerSEarchOrder -ne $null} | select-object -ExpandProperty DNSServerSearchOrder)if ($actualDNS.Count -eq 0) {    Write-Host "Message.DNS1: Not Found"    Write-Host "Statistic.DNS1: 0"    Write-Host "Message.DNS2: Not Found"    Write-Host "Statistic.DNS2: 0"    exit 1 #1 = down} else {    $matchCount = 0    for($i = 1; $i -le $actualDNS.Count; $i++) {        Write-Host "Message.DNS${i}: $($actualDNS[$i])"        if ($expectedDNS -notcontains $actualDNS[$i]) {            Write-Host "Static.DNS${i}: 0"        } else {            Write-Host "Static.DNS${i}: 1"            $matchCount++        }    }    if ($matchCount -ne $expectedDNS.Count) {        exit 2 #2 = warning    }}exit 0 #0 = OK

This document might be handy as well. The Basics of PowerShell (part 3)