How To Configure Nagios Monitoring Tool In Linux

How To Configure Nagios Monitoring Tool In CentOs

·       Why We Use nagios

We run Nagios to monitor roughly 35 servers and several hundred services in our environment. We even use it to monitor about 20 websites we host and notify us when SSL certificates need to be renewed. Nagios is a very robust and customizable solution, it's not the easiest thing in the world to configure, but well worth the effort. I may do a video to go a long with this article at some point.

Disable selinux

• # setenforce 0

Install required packages

• # yum install httpd gcc glibc glibc-common gd gd-devel php

Create Nagios User & Group

• # useradd -m nagios

• # groupadd nagcmd

Add nagios user and apache user to nagios group

• # usermod -a -G nagcmd nagios
• # usermod -a -G nagcmd apache

Create Directory for nagios download

• # mkdir /etc/downloads
• # cd /etc/downloads

Download Nagios and Plugins files

• # wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.2.3.tar.gz
• # wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz

Extract files

• # tar xzf nagios-3.2.3.tar.gz
• # tar xzf nagios-plugins-1.4.15.tar.gz

Configure/Compile

• # cd /etc/downloads/nagios-3.2.3
• # ./configure --with-command-group=nagcmd
• # make all
• # make install
• # make install-init
• # make install-config
• # make install-commandmode
• # make install-webconf

Create Web Interface User account

• # htpasswd -c /usr/local/nagios/etc/htpasswd.users admin

Restart Apache:

• # service httpd restart

Install Nagios Plugins

• # cd /etc/downloads/nagios-plugins-1.4.15.tar.gz

Configure/Compile

• # ./configure --with-nagios-user=nagios --with-nagios-group=nagios
• # make
• # make install

Enable Nagios to start at system startup

• # chkconfig --add nagios
• # chkconfig nagios on
• # chkconfig httpd on

Start Nagios service

• # service nagios start

How To Open Nagios After Successfully Installing.

Log in to http://IPOFSERVER/nagios