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SteveDahlberg's avatar
SteveDahlberg
Icon for Neophyte rankNeophyte
5 months ago
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New to LM: How do I refer to the local filesystem in an embedded PowerShell script of a DataSource?

How do I refer to the local filesystem in an embedded PowerShell script of a DataSource? The below works fine from a PowerShell session console on a Collector server, but fails when running embedded ...
  • Mike_Moniz's avatar
    Mike_Moniz
    5 months ago

    Yes, and you see it worked for me in my screenshot with a full path. The only thing I'm aware of that LM will do to a powershell script is do a search-and-replace of ##TOKEN## but I didn't see any of that in your code. Even your error message isn't show the path getting screwed up and it's powershell telling you the file doesn't exist there.

    I would 100% make sure the script is actually running on the server you think it's running on. Does "Write-Output $env:computername" show the name of the server with the file?

Mike_Moniz's avatar
Mike_Moniz
Icon for Professor rankProfessor
5 months ago

I think you need a step back a bit a get a better understanding of how Script and BatchScript DataSources works. I suggest watching some of the videos in LM Academy like https://academy.logicmonitor.com/introduction-to-datasources and reading over the docs like https://www.logicmonitor.com/support/logicmodules/datasources/data-collection-methods/scripted-data-collection-overview and  https://www.logicmonitor.com/support/logicmodules/datasources/data-collection-methods/batchscript-data-collection and https://www.logicmonitor.com/support/logicmodules/datasources/data-collection-methods/scripted-data-collection-overview. Also highly suggest you look at existing DataSources to understand how it works like Microsoft_DHCP_IPv4Scopes. Look at the examples at https://www.logicmonitor.com/support/terminology-syntax/scripting-support/embedded-powershell-scripting

Suggest working out answers to questions like:

  • What is the difference between a Script and BatchScript DataSource?
  • How do I know what device/resource LogicMonitor wants data on?

For example LogicMonitor will tell you what device it wants information on, you don't tell it.

Here is an example of a BatchScript DataSource, if you wanted to implement getting disk usage of all the drives on a device.

ActiveDiscovery: Get the name of the device from LM by looking at ##SYSTEM.HOSTNAME## and sent a query to that device asking for the list of all drives. Output something like this:

C##C Drive
D##D Drive

Collection: Get the name of the device from LM by looking at ##SYSTEM.HOSTNAME## and send a query to that device asking for the list of all drives along with the usage information. Output something like this:

C.totalspace=1000
C.freespace=10
C.usedspace=900
D.totalspace=2000
D.freespace=50
D.usedspace=1950

When LM later on wants to get the information for the free space of the D: drive, it will set the ##WILDVALUE## to "D" and extract all the lines that start with "D." then pull the totalspace, freespace, and usedspace.

Your script should only provide output for the device that LM is requesting data on. You would get that information from a line like this:

#Get the hostname the LM wants data on
$Hostname = '##SYSTEM.HOSTNAME##';