Table of Contents

Install Nagios Plugin and NRPE on Redhat

Prerequisite install

Redhat 3rd party libraries if added to yum can let you install nrpe via yum. However, below is an explanation of now to compile this locally.

Download and Extract files

Download and copy files to /tmp

Extract files

cd /tmp
tar zxvf nrpe-2.15.tar.gz
tar zxvf nagios-plugins-1.5.tar.gz

Create nagios Account

groupadd nagios
useradd -d /var/log/nagios -g nagios -m -p somepassword nagios
date|md5sum|cut -b "1-10" | passwd --stdin nagios
id nagios

Install the Nagios Plugins

cd nagios-plugins-1.5
./configure
make
make install
chown -R nagios:nagios /usr/local/nagios

Install the NRPE daemon

cd nrpe-2.15
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config
make install-xinetd

chown -R nagios:nagios /usr/local/nagios

Update nagios server IP address here. Included additional IP separated by spaces.

grep only /etc/xinetd.d/nrpe

Use the following example to replace easily!

sed -i 's@only_from       = 127.0.0.1@only_from       = 127.0.0.1 10.50.60.0/24 204.67.86.0/24@' /etc/xinetd.d/nrpe

Add the NRPE daemon to services

echo "nrpe            5666/tcp                # NRPE" >> /etc/services
service xinetd restart

Test NRPE daemon

Check for Listening port

netstat -at | grep nrpe

should have output as

tcp        0      0 *:nrpe                      *:*                         LISTEN

Run the call to service

/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1

Should return NRPE v2.15

Additional plugins

Copy any additional plugins to /usr/local/nagios/libexec/ such as check_linux_stats.pl

File locations

Nagios Core, Nagios NRPE Deamon and Nagios Plugin Locations

Compiled Version

Plugins (executables)

/usr/local/nagios/libexec/check_nrpe

NRPE Deamon config file (settings)

/etc/xinetd.d/nrpe

NRPE Config file (commands)

/usr/local/nagios/etc/nrpe.cfg

Ubuntu

Core Nagios Monitoring config directory (settings)

/etc/nagios3/conf.d/

Plugin Location (executables)

/usr/lib/nagios/plugins

Redhat

NRPE Config file (commands)

/etc/nagios/nrpe.cfg

Plugin Location

/usr/lib64/nagios/plugins/

Install Sys:Statistics:Linux via CPAN

Sys:Statistics:Linux