In the previous article, i have guide you on how to install Nagios Core, mainly for network and services monitoring. In this post, i will guide you on how to install Nagios NRPE. Nagios Remote Plugin Executor (NRPE) is a Nagios agent that allows to remotely execute Nagios plugins on other Linux/Unix machines. NRPE can also communicate with Windows agent addons like NSClient++. It allows for monitoring resources such as disk usage, CPU load, etc. Please follow the following steps to install Nagios NRPE on your Nagios server.
Prerequisites
How to Install Nagios on CentOS 5.5
Steps:
1. Install the Nagios NRPE and Nagios-devel. For your information, Nagios-devel is a header files, libraries and development documentation for nagios.
[root@server ~]# yum --enablerepo=rpmforge install nagios-nrpe nagios-devel
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons: ossm.utm.my
* base: ossm.utm.my
* epel: ftp.cuhk.edu.hk
* extras: ossm.utm.my
* rpmforge: fr2.rpmfind.net
* updates: ossm.utm.my
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package nagios-devel.i386 0:3.2.3-3.el5.rf set to be updated
---> Package nagios-nrpe.i386 0:2.12-1.el5.rf set to be updated
--> Finished Dependency Resolution
Dependencies Resolved
=====================================================================================
Package Arch Version Repository Size
=====================================================================================
Installing:
nagios-devel i386 3.2.3-3.el5.rf rpmforge 42 k
nagios-nrpe i386 2.12-1.el5.rf rpmforge 35 k
Transaction Summary
=====================================================================================
Install 2 Package(s)
Upgrade 0 Package(s)
Total download size: 76 k
Is this ok [y/N]: y
Downloading Packages:
(1/2): nagios-nrpe-2.12-1.el5.rf.i386.rpm | 35 kB 00:00
(2/2): nagios-devel-3.2.3-3.el5.rf.i386.rpm | 42 kB 00:00
-------------------------------------------------------------------------------------
Total 23 kB/s | 76 kB 00:03
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : nagios-nrpe 1/2
Installing : nagios-devel 2/2
Installed:
nagios-devel.i386 0:3.2.3-3.el5.rf nagios-nrpe.i386 0:2.12-1.el5.rf
Complete!2. Set nrpe to start at boot and start nrpe
[root@server ~]# chkconfig nrpe on
[root@server ~]# /etc/init.d/nrpe start
Starting Nagios NRPE daemon (nrpe): [ OK ]3. Update the /etc/services. At the following line at the bottom of the page.
[root@server ~]# vi /etc/servicesnrpe 5666/tcp # NRPE4. Test NRPE daemon install
[root@server ~]# netstat -at |grep nrpe
tcp 0 0 server.intranet.local:nrpe *:* LISTEN