How to Install Munin (Network Monitoring Tool) in CentOS, Red Hat & Fedora

Munin is a networked resource monitoring tool that can help analyze resource trends. Munin the monitoring tool surveys all your computers and remembers what it saw. It presents all the information in graphs through a web interface.

This article will help you to install Munin on your system.

Step 1: Setup EPEL Repository

First we need to add epel repository in our system. Use one of following command to install as per system architecture.

# yum install epel-release

Step 2: Install Munin Packages

Use following command to install Munin and required packages

# yum --enablerepo=epel install munin munin-node rrdtool

Step 3: Configure Apache

By default Munin creates Apache configuration file /etc/httpd/conf.d/munin.conf. Edit Munin Apache configuration file and add following content.

# vim /etc/httpd/conf.d/munin.conf

Alias /munin /var/www/html/munin
<Directory /var/www/html/munin>
    Options FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>

<directory /var/www/html/munin>
	AuthUserFile /etc/munin/munin-htpasswd
	AuthName "Munin"
	AuthType Basic
	require valid-user

	ExpiresActive On
	ExpiresDefault M310
</directory>
ScriptAlias /munin-cgi/munin-cgi-graph /var/www/cgi-bin/munin-cgi-graph

Create munin htpasswd file using following command

# htpasswd -cm /etc/munin/munin-htpasswd muninadmin
New password:
Re-type new password:

Above created login details will required to access Munin web interface.

Step 4: Restart Services

First start Munin node service and configure to auto start on system boot.

# /etc/init.d/munin-node start
# chkconfig munin-node on

Restart Apache service

# service httpd restart

Step 5: Access Munin Web Interface

Open following url in browser to access Munin web interface. Change ip/domain as per your setup.

http://192.168.1.100/munin
or
http://svr2.tecadmin.net/munin

Wait approx one hour to view Munin graphs in web interface.

For more details and configuration of munin refer following links
http://munin.readthedocs.org/en/latest/
http://munin.readthedocs.org/en/latest/installation/configuration.html