NMHeapDump.hprof

[mcapra]

Could you please tell me how check_services is working?

check_services is a NRPE command definition that exists in your NRPE configuration file. In your provided example:

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/usr/local/nagios/libexec/check_nrpe -H x.x.x.x -t 30 -c check_services -a '/NMHeapDump.hprof'

check_services is a command definition passed to the remote NRPE server via the -c argument. If you were to rename this command in your nrpe.cfg file to check_something_else, you could execute it remotely via check_nrpe from your Nagios Core machine like so:

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/usr/local/nagios/libexec/check_nrpe -H x.x.x.x -t 30 -c check_something_else -a '/NMHeapDump.hprof'

What you pass to check_nrpe via the -c argument has nothing to do with any Nagios Core side configuration or plugins. It is completely user-defined.

As such, we have no way of knowing exactly what that command is referencing which is why I requested the nrpe.cfg file from the remote machine. We could make guesses at what this command is defined as, but not much else.

If you could share the remote machine's nrpe.cfg file, that might be helpful.

It would also be useful to know what plugin/script the NRPE command definition is referencing. Executing that plugin/script from the CLI of the remote machine should give us enough information. If it is not a compiled binary, attaching a copy of the plugin would also be helpful.

[cdienger]

check_services is a script found on the remote machine running the nrpe agent. There is some logic which determines which commands to run to verify if a service is running depending on the OS so I would recommend just reviewing the script to answer your question.. The check_services script is usually in /usr/lib/nagios/plugins/.