[/settings/external scripts/] PSCheckCertificate=cmd /c echo scripts\Check-Certificate.ps1; exit($lastexitcode) | powershell.exe -command - In your nsclient.ini, you've named the command PSCheckCertificate. That is what you should be passing as the command name -c via check_nrpe: #check_nrpe -H 172...

Depending on how it is done, I could see this creating some package conflicts, or issues with library dependencies, with future Nagios XI updates. But you could definitely offload the Nagios XI database needs to a a different server and avoid all of that: https://assets.nagios.com/downloads/nagiosxi...

Check the following configuration directives in your main Nagios Core configuration file to make sure they reflect your desired behavior: https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/configmain.html#retain_state_information retain_state_information state_retention_file retenti...

You might be able to get a similar effect with notes for a particular host/service: https://support.nagios.com/forum/viewtopic.php?f=7&t=48790&p=252672#p252672 I also get into modifying the source code to add custom elements to the status.cgi page: https://support.nagios.com/forum/viewtopic....

http://nagios-plugins.org/doc/guidelines.html Piping into sed is going to overwrite the exit code that was returned by the check_icmp plugin. You're seeing "OK" because your final sed command in the chain is returning 0 for the exit code. Your Bash logic should include something to make su...

Which version of NSClient++ is running on the Windows VMs? It's going to influence how filters for your check_nrpe executions are written. Here's a thread from the customer support section in which lmiltchev offers some logic to filter out \\?\Volume records from the check_drivesize results: https:/...

A related thread: https://support.nagios.com/forum/viewtopic.php?f=7&t=44016 Nagios has some internal timeouts that apply to all plugin executions. SNMP is sloooowwwww. If your snmpget command takes longer than 60 seconds to return, you may be hitting the service_check_timeout limit, which trigg...

The solution is to either sign that script with an authority your system/organization likes, or to change the Powershell execution policy to allow unsigned (or remote signed) scripts to be executed: http://tritoneco.com/2014/02/21/fix-for-powershell-script-not-digitally-signed/ Here's more info in a...

Really sounds like you're looking for a custom event handler rather than a traditional Nagios plugin.

But yeah, all of that sounds very doable on a basic level and even something very typical of what people generally do with event handlers.

If you're willing to throw money at the problem, Nagios XI has pretty seamless integrations for performance data. Migrating from Core to XI is relatively painless: https://assets.nagios.com/downloads/nagiosxi/docs/Migrating-From-Nagios-Core-To-Nagios-XI.pdf If you're looking for something free, I'd ...