Compiling and installing Nagios plugin

Nagios plugins are executed via NRPE (Nagios remote plugin executor) client at host side. Whatever output comes from Nagios plugins the NRPE plugin converts it into format understood by Nagios to which the server takes necessary actions.

First xinetd service needs to be installed

yum install xinetd -y

Installing NRPE plugin -

cd /root/nagios

wget https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-3.2.1/nrpe-3.2.1.tar.gz

tar xzf nrpe-3.2.1.tar.gz

cd nrpe-3.2.1

./configure

make all

make install-plugin; make install-daemon;make install-daemon-config

make install-xinetd

vim /etc/xinetd.d/nrpe

edit following lines -

only_from = 127.0.0.1 localhost

vim /etc/services

nrpe 5666/tcp NRPE

service xinetd restart

Verifying the process via ps aux|grep nrpe or netstat -ntlp|grep nrpe