Customer Powershell Script Returns no response

Hello mbaybarsk,
we appreciate your contact.

As for not having values, please be aware that channel values must be numerical, example result:

<prtg>
<result>
<channel>CPU Core #1</channel>
<value>34</value>
<Unit>Temperature</Unit>
</result>
<result>
<channel>CPU Core #2</channel>
<value>42</value>
<Unit>Temperature</Unit>
</result>
<result>
<channel>CPU Package</channel>
<value>42</value>
<Unit>Temperature</Unit>
</result>
</prtg>

Make sure that all values are numerical. You can check the actual result received by PRTG by enabling the Write EXE result to disk setting within the sensor, the log will be stored on the probe which runs the sensor under this folder:

Best Regards,

If I'm only allowed numerical sensors with this type of sensor. Is there any way I can use WQL scripts to get string results? Or any other type?

You can use the <text> element to return text within a sensor, but please be aware that:

1. The text is for the whole sensor (Sensor's message), it can't be assigned to channels. See output below for example.
2. PRTG will not perform further evaluation upon the text, any warning/error related status processing will have to be done in the script itself, see second example.

            <prtg>
            <result>
            <channel>First channel</channel>
            <value>10</value>
            </result>
            <result>
            <channel>Second channel</channel>
            <value>20</value>
            </result>
            <text>This is the sensors text</text>
            </prtg>

Example output to set force the sensor into error (Down) :

              <prtg>
              <error>1</error>
              <text>Your error message</text>
              </prtg>

• It's also possible to set the whole sensor to a Warning status by appending it to one of the <channel> entries (In contrast to the <error>1</error> which must be used outside of the <result>):

            <prtg>
            <result>
            <channel>First channel</channel>
            <value>10</value>
            <Warning>1</Warning>
            </result>
            <result>
            <channel>Second channel</channel>
            <value>20</value>
            </result>
            <text>This is the sensors text</text>
            </prtg>

Please check the API's documentation for further details.

Best Regards,

Hello,

I get it, I will have to use WMI for those text based values. However, the problem with other numerical values continue. Here's a better version of the same script.

$output = "<prtg>"
$hostname = $env:computername
$drives = get-psdrive -psprovider 'FileSystem' | select root
$drives = $drives.root

ForEach ($drive in $drives) 
    {$path = $drive + "BroadView\ServerManager\Plugins\startup_plugin.xml"
     if (test-path $path)
     {$startup = $path}
    }

[xml]$XmlDocument = Get-Content  $startup 
$databases = $xmldocument.BVSManager.StartupData.DBEntries.Database | where { $_.Server -eq $hostname} 
$databases = $databases.Path
$numberofdbs = $databases.count 



for  ($i=0; $i -le $numberofdbs; $i++)
{
$size = (get-item($databases[$i])).Length
$output = $output + "<result><channel>" + $i + "</channel><value>" + $size + "</value></result>" 
}

$output += "</prtg>"
write-host $output

When I run this script manually on the destination servers, it runs perfectly fine & gives me the XML I want but the script fails when run as a sensor. Here are the error messages:

Get-Content : Cannot bind argument to parameter 'Path' because it is null.
At C:\Program Files (x86)\PRTG Network Monitor\custom 
sensors\EXEXML\BVS_Clients.ps1:12 char:34
+ [xml]$XmlDocument = Get-Content  $startup
+                                  ~~~~~~~~
    + CategoryInfo          : InvalidData: (:) [Get-Content], ParameterBinding 
   ValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,M 
   icrosoft.PowerShell.Commands.GetContentCommand
 
Cannot index into a null array.
At C:\Program Files (x86)\PRTG Network Monitor\custom 
sensors\EXEXML\BVS_Clients.ps1:21 char:1
+ $size = (get-item($databases[$i])).Length
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray
 
<prtg><result><channel>0</channel><value></value></result></prtg>

I believe the reason for that is PRTG is simply running this locally. How can I make PRTG run this script on the host that has this sensor setup?

Thanks for the response, it all works as I wanted other than having the ability to have strings as a value on powershell scripts.

Here's the final form of my script if anybody needs an example on how to make this conversion.

param(
    [string]$device = 'xxx' ,
    [string]$smdevice = 'xxx' ,
    [string]$domain = 'domain',
    [string]$username = 'user',
    [string]$password = 'password'
    )

$combination = $domain + "\" + $username
$pass = ConvertTo-SecureString -AsPlainText $password -Force
$Cred = New-Object System.Management.Automation.PSCredential -ArgumentList $combination,$pass

$result = Invoke-Command -ComputerName $smdevice -ScriptBlock {  

param(
    [string]$device
    )

$drives = get-psdrive -psprovider 'FileSystem' | select root
$drives = $drives.root

ForEach ($drive in $drives) 
    {$path = $drive + "xyz\ServerManager\Plugins\startup_plugin.xml"
     if (test-path $path)
     {$startup = $path}
    }

[xml]$XmlDocument = Get-Content  $startup 
$databases = $xmldocument.BVSManager.StartupData.DBEntries.Database | where { $_.Server -eq $device}
$databases = $databases.Path 
return $databases

} -credential $cred -ArgumentList $device


Invoke-Command -ComputerName $device -ScriptBlock { 
param(
    [array]$result
    ) 

$databases = $result
$numberofdbs = $databases.count

$output = "<prtg>"

for  ($i=0; $i -lt $numberofdbs; $i++)
{
$size = (get-item($databases[$i])).Length
if ($databases[$i]) {$channelname = $databases[$i]} else {$channelname = 'unknown'}
$output = $output + "<result><channel>" + $channelname + "</channel><value>" + $size + "</value></result>" 
}

$output += "</prtg>"
return $output


} -credential $cred -ArgumentList (,$result)