Powershell script does not return values

[mirei83]

Agent Mode:

• [x] Pull Model (openITCOCKPIT Server request data from Agent)
• [ ] Push Model (Agent send data to openITCOCKPIT)

Versions

• openITCOKPIT Server Version: 4.2.3
• openITCOCKPIT Monitoring Agent Version: 3.0.7 (3.0.6 too)

Operating system Please provide detailed operating system description (please do not just say "windows" or "linux"), installed antivirus, anything else that could be helpful information

• Windows Server 2012, 2016, 2019 (actively tested)
• no AV
• reproducable in all versions

Describe the bug I have an issue, that a script to check exchange values (https://github.com/yosbit/nagios-plugins/blob/master/README/README_check_exchange.md) does not work with the agent in version 3. It did work fine in version 2. Other powershell scripts do return values.

• the script works directely from powershell command.
• the script works when started as same user as the agent is running
• the script did work in version 2
• the script does work wir powershell 32bit and 64 bit
• the script did work on several exchange servers, and now works on none of them
• I cannot be 100% sure if it stopped working after the upgrade to version 3 or if maybe a windows update broke the script.

To Reproduce Steps to reproduce the behavior:

1. Download script https://github.com/yosbit/nagios-plugins/blob/master/README/README_check_exchange.md

2. Set as custom check with ' [check_exchange_DB] command = powershell.exe -file "C:\scripts\oitc\check_exchange.ps1" -CheckType DBStatus interval = 1800 timeout = 120 enabled = true '

3. Return in agent is ' "customchecks": { "check_exchange_db": { "stdout": "UNKNOWN: \n", "rc": 0, "execution_unix_timestamp_sec": 1632384259 '

4. Return in powershell is ' OK: All Exchange DB are mounted, Databases: Mailbox Database 0423674483 Total: 1 '

[nook24]

Since Agent version 3 it is possible to define the shell the Agent should use for the execution. I would recommend you to set shell = powershell:

[check_exchange_DB]
command = "C:\scripts\oitc\check_exchange.ps1 -CheckType DBStatus"
# Maybe command = "C:\scripts\oitc\check_exchange.ps1" -CheckType DBStatus
shell = powershell
interval = 1800
timeout = 120
enabled = true

More examples can be found in the example config for custom checks: https://github.com/it-novum/openitcockpit-agent-go/blob/main/example/customchecks_example.ini

Hope this helps

[mirei83]

Thank you for your answer. Unfortunatelly this did not solve my problem. After some testing I was able to make it work again, so I want to share the solution.

Somehow the script does not work when executed from the OITC agent. The solution was to simply remove the

begin {...} process{...} end{...}

bracets. Then it worked again.

I still cant tell if it was the version change from OITC or a Windows Update.

[nook24]

The docs of PowerShell 7.1 claims that this is still a thing: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_functions_cmdletbindingattribute?view=powershell-7.1

How ever I have nearly zero experience with powershell soo - as long as it works :)