Problem with custom Sensor

Have you tried specifying credentials to run the sensor? In the sensor settings you can define the security context to be the windows credentials of the parent device which can help depending on the script. If that doesn't help, could you send over the script as well as the result in Powershell to support@paessler.com?

Hi Greg,

first of all, thanks for your help ;)

I already had the settings "Use Windows credentials of parent device " active, but I switched to "Use security context of probe service" and back to the Windows credentials and now I got the following (for both script -> Data in parameters field and data directly in the script):

"Dem Client fehlt ein erforderliches Recht. (0x522)" .... strange

I seem to remember, that the first time I tried to activate the remote signing for scripts, I`ve received a hint, that another setting would overwrite the remote signing. Is that possible?

The Script is the same as described in my first comment:

#---------------------------------------------------------------------------------------------
# Get the number of VM snapshots on ESX host or vCenter
#
# This script requires the installation of the VMware Infrastructure (VI) Toolkit for Windows.
# 
# Args[0]:Server
# Args[1]:Protocol (HTTP/HTTPS)
# Args[2]:User
# Args[3]:Password
# Args[4]:Location (VI container(s), e.g. folders, datacenters, clusters). 
#		  Enclose in ' ' if location name contains spaces.
# Args[5]:VM power state (PoweredOn, PoweredOff, * for all)
#
# Example 1: Snapshot count for single DRS cluster, only powered-on VMs
# 10.23.112.235 https Administrator pass01 'My DRS Cluster' 'PoweredOn'
#
# Example 2: multiple datacenters, all VMs
# 10.23.112.235 https Administrator pass01 'My Data Center 1','My Data Center 2' '*'
# 
#---------------------------------------------------------------------------------------------


Add-PSSnapin VMWare.VIMAutomation.core >$Null

$global:textvar = ""

$server=Connect-VIServer -Server $Args[0] -Protocol $Args[1] -User $Args[2] -Password $Args[3]>$Null
$powerstate = [string]$Args[5]
$snapshot_count = 0

Get-VM -Location $Args[4] -Server $server | Get-Snapshot | `
ForEach-Object {
	$snapshot_count = $snapshot_count+1
}


function get-snaps{
    $vms = get-vm | sort name
    $vmsnaps = @()
    foreach($vm in $vms){
    	$snap = Get-Snapshot $vm
    	if($snap){
		  $vmsnaps += $vm
		  $snapshots = Get-Snapshot $vm
		  foreach ($snapshot in $snapshots){
          $global:textvar += $vm 
		  $global:textvar += "("
          $global:textvar += $snapshot.name
		  $global:textvar += "," 
		  $global:textvar += ([math]::Round($snapshot.sizemb/1024,2))
		  $global:textvar += ")"
		  $global:textvar += " - "

		}
    	}
    }
}
 
get-snaps


$x=[string]$snapshot_count+":"+$global:textvar

#write-host "$snapshot_count"

if($snapshot_count -ne 0){

write-host "<prtg>"
write-host "<error>"
write-host "1"
write-host "</error>"
write-host "<text>"
write-host $global:textvar
write-host "</text>"
write-host "</prtg>"


}

if($snapshot_count -eq 0){

write-host "<prtg>"
write-host "<result>"
write-host "<channel>Snapshots running</channel>"
write-host "<value>"
write-host $snapshot_count
write-host "</value>"
write-host "<LimitMaxError>0</LimitMaxError>"
write-host "<LimitMode>1</LimitMode>"
write-host "</result>"
write-host "</prtg>"


}

Result in Powershell

WARNUNG: There were one or more problems with the server certificate:

* The X509 chain could not be built up to the root certificate.

* The certificate's CN name does not match the passed value.

<prtg>
<error>
1
</error>
<text>
Servername1.tld(_datarecovery_,0) - Servername2.tld(_datarecovery_,0) - Servername3.tld(_datarecovery_,0) -
</text>
</prtg>

Thanks in advance for your help,

Fox

Just to get a clearer idea of what is causing the error, can you write the EXE to disk and post it here?

You mean the Log?!

Yes, are you still getting the same failure as before in the log when you select the option "Write EXE result to disk"?

"Die Datei "C:\Program Files (x86)\PRTG Network Monitor\custom sensors\EXEXML\Sn apshots.ps1" kann nicht geladen werden, da die Ausführung von Skripts auf diese m System deaktiviert ist. Weitere Informationen erhalten Sie mit "get-help abou t_signing"."

If so, what server do you have this sensor running on? Have you checked the Execution Policy on the server the script is being run on with the Get-Execution Policy command? Can you try setting this to unrestricted?

Hi Creg,

thanks for your help!

"Write EXE result to disk" an "Write EXE result to disk in case of error" don`t bring up any logs anymore in the LOG-Folder (C:\ProgramData\Paessler\PRTG Network Monitor\Logs (Sensors))...

As for the Execution Policy, do you read my Comments?!?! I already tried that, as you can read in my first post. It doesn`t work.

The Server, the script is running on, is the same which runs the Probe and VCenter Server.

Anymore ideas?

Regards, Fox

So the setup is that you have a remote probe running on a server that is also running vcenter and you have put the sensor in PRTG on that probe to run correct? Are you using the IP of the server or the localhost for the IP in the parameters? Also, please try running the script from below to see if that works.

#---------------------------------------------------------------------------------------------
# Get the number of VM snapshots on ESX host or vCenter
#
# This script requires the installation of the VMware Infrastructure (VI) Toolkit for Windows.
# 
# Args[0]:Server
# Args[1]:Protocol (HTTP/HTTPS)
# Args[2]:User
# Args[3]:Password
# Args[4]:Location (VI container(s), e.g. folders, datacenters, clusters). 
#		  Enclose in ' ' if location name contains spaces.
# Args[5]:VM power state (PoweredOn, PoweredOff, * for all)
#
# Example 1: Snapshot count for single DRS cluster, only powered-on VMs
# 10.23.112.235 https Administrator pass01 'My DRS Cluster' 'PoweredOn'
#
# Example 2: multiple datacenters, all VMs
# 10.23.112.235 https Administrator pass01 'My Data Center 1','My Data Center 2' '*'
# 
#---------------------------------------------------------------------------------------------


Add-PSSnapin VMWare.VIMAutomation.core > $Null

$global:textvar = ""

$server=Connect-VIServer -Server $Args[0] -Protocol $Args[1] -User $Args[2] -Password $Args[3] > $Null
$powerstate = [string]$Args[5]
$snapshot_count = 0

Get-VM -Location $Args[4] -Server $server | Get-Snapshot | `
ForEach-Object {
	$snapshot_count = $snapshot_count+1
}


function get-snaps{
    $vms = get-vm | sort name
    $vmsnaps = @()
    foreach($vm in $vms){
    	$snap = Get-Snapshot $vm
    	if($snap){
		  $vmsnaps += $vm
		  $snapshots = Get-Snapshot $vm
		  foreach ($snapshot in $snapshots){
          $global:textvar += $vm 
		  $global:textvar += "("
          $global:textvar += $snapshot.name
		  $global:textvar += "," 
		  $global:textvar += ([math]::Round($snapshot.sizemb/1024,2))
		  $global:textvar += ")"
		  $global:textvar += " - "

		}
    	}
    }
}
 
get-snaps


$x=[string]$snapshot_count+":"+$global:textvar

#write-host "$snapshot_count"

if($snapshot_count -ne 0){

write-host "<prtg>"
write-host "<error>"
write-host "1"
write-host "</error>"
write-host "<text>"
write-host $global:textvar
write-host "</text>"
write-host "</prtg>"


}

if($snapshot_count -eq 0){

write-host "<prtg>"
write-host "<result>"
write-host "<channel>Snapshots running</channel>"
write-host "<value>"
write-host $snapshot_count
write-host "</value>"
write-host "<LimitMaxError>0</LimitMaxError>"
write-host "<LimitMode>1</LimitMode>"
write-host "</result>"
write-host "</prtg>"


}

Hi Creg,

thanks that you keep on supporting me ;)

Unfortunately, I get the same Error with your new Version of the Script, but there is one thing I was able to find out.

If I run the PRTG Service with the "local system" User, I get the Error:

"Error reading response: Invalid XML (missing /prtg)"

If I run the PRTG Service with a special Service User (for example: svc.prtg) and Dom-Admin rights etc., I get the Error:

"Dem Client fehlt ein erforderliches Recht. (0x522)"

But I don`t now, where I have to delegate the rights to the service user, to get that sensor running.

Generally I`m not sure, which Error is better :) Should I use the "local system" or the "prtg service" user.

Regards, Fox

Hi Creg,

thank you very much, it seems that it`s working now :) What have I done:

1. "Set-ExecutionPolicy" to "Unrestricted" on both Powershells (32-Bit and 64-Bit) 2. "Set-ExecutionPolicy" back to "RemoteSigned" on both Powershells (32-Bit and 64-Bit) 3. Set back the Settings for "Security Context" to "Use security context of probe service"

And now it is working, hurray!

So again Craig, thank you very much for your help, I really appreciated!!!

A last question before I will let you go :)

Is there a possibility to show the result of the sensor (the XML output) in the "Channels" field. At the moment it is shown under "Last Message" and I can`t see the whole output, because the field is to small.

Regards from germany, Fox

I'm afraid that the results in a channel wouldn't be beneficial since the fields for the channels are also limited to 2000 characters. You could try splitting this up into multiple fields but this wouldn't really be an attractive option...

Ok, thanks.