Nagios - NRPE: Command 'xxxxxxx' not defined

[primexm_cr]

Hi all,

This is my very first post to this forum; just registered.

I am running Nagios Core 4.0.8 in my company for monitoring a number of virtual as well as bare-metal machines. The current configuration involves a number of Windows-based virtual machines and two bare-metal RHEL instances. I am currently having issues in configuring one of the RHEL instances with Nagios in the following way...NRPE seems to be properly configured because when I issue ./check_nrpe -H 192.168.0.38 from my Nagios instance to the RHEL instance I am trying to monitor, I get NRPE v2.15. In addition to this, monitoring seems to be working for only a single sensor, CPU, instead of all the sensors specified, Disk Space, Memory and SWAP. Finally, the other RHEL instance seems to be working fine, so I am assuming that the configuration has nothing to do with Nagios instance itself, but the bare-metal machine. Please refer to the screenshot attached for clarification.

**Please note that all Windows-based machines as well as the 1st RHEL instance are working 100% fine, with all sensors operating properly; even though I have added additional, custom sensors for monitoring Event Logs, Services etc.

Nagios IP Address: 192.168.0.10
RHEL 1st Instance: 192.168.0.37
RHEL 2nd Instance: 192.168.0.38

Any help would be much appreciated.

Thank you in advance.

[ssax]

Please run the command below on the working one and a non working one:

Code: Select all

sestatus

Also, make sure you've installed the Nagios plugins and have modified your nrpe.cfg.