Telegraf exec plugin - powershell script errors not seen/logged

1

I’m using Telegraf to gather some data using a Powershell script, it gives an error which is not seen by Telegraf and therefore is not logged

script file (myScript.ps1):

Get-CimInstance CIM_LogicalDisk -ComputerName _RemoteHost_

Note: in the full script the data gets formatted in influx line format, but to show the problem that’s not needed)

When I run myScript.ps1 from Powershell or cmd

#Powershell
.\myScript.ps1
#cmd
Powershell.exe -Command "C:\Monitoring\telegraf\myScript.ps1"

I get the following error:

Get-CimInstance : Access is denied.

So far everything is ok.

If I create a Telegraf conf file that executes this command (extract of test.conf):

{...}
[agent]
  ## Log
  debug = true
  quiet = false

  ##  empty string means to log to stderr.
  #logfile = ""
  {...}

[[inputs.exec]]
  ## Commands array
  commands = [
    'powershell.exe "C:\Monitoring\telegraf\myScript.ps1"'
  ]
  {...}

and then I test it

.\telegraf.exe --config .\test.conf --test

#Output
2019-12-06T14:05:17Z I! Starting Telegraf 1.12.5
2019-12-06T14:05:17Z D! [agent] Initializing plugins

As you can see no error is reported, but I expect to see one since an exception is raised by the script.
Have you ever faced this problem?

2

This has been solved on github.

The problem is the exit code returned by powershell to the cmd, see the link above for reference