Nagios Installation in Linux

Nagios Installation in Linux

Release:
RedHat Enterprise Linux

Problem:
Install Nagios system monitoring tool in RedHat Enterprise Server.

Solution:

1. Download the Nagios from the below link

         http://www.nagios.org/download

2. Install the require RPMs

# yum install httpd php

# yum install gcc glibc gd gd-devel

3. Create a user account to install the nagios

# useradd nagios

# passwd nagios

4. Create a new group and add both nagios and apache users in that group

# groupadd nagcmd

# usermod -a -G nagcmd nagios

# usermod -a -G nagcmd apache

5. Compile and install the nagios

# tar zxvf nagios-xxx.tar.gz

# cd nagios-xxx

# ./configure –with-command-group=nagcmd

# make all

# make install

# make install-init

# make install-config

# make install-commandmode

6. Sample configuration files are available in the below directory

# cd /usr/local/nagios/etc

7. Customize the below file to send alerts to the mail id

# vi /usr/local/nagios/etc/objects/contacts.cfg

8. configure the web interface by using the below command

# make install-webconf

9. Create a login account to login into nagios web interface.

# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

Note: Here “nagiosadmin” is the user account to login in the web interface.

10. Restart the httpd service

# service httpd restart

11. Compile and install the nagios plugins

# tar -zxvf nagois-plugins-xxx.tar.gz

# cd nagios-plugins-xxx

# ./configure –with-nagios-user=nagio –with-nagios-group=nagios

# make

# make install

12. Add the nagios service to the system service by using the below commands

# chkconfig –add nagios

# chkconfig nagios on

13. Verify the nagios configuration file and start the service

# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

# service nagios start

14. Access the nagios web interface by using the below URL.

http://localhost/nagios