How to Install Munin Monitoring Tool On CentOS/RHEL 7/6/5

Munin Monitoring Tool uses RRDTool and a frame work was written in Perl. Munin is an open source web based networking resource monitoring tool that can be used to monitor all computers on your network. It displays the gathered information from your system as graphs through a web based interface.

In this article, we will help you to setup Munin network monitoring tool.

Step 1: Install EPEL Repository

Munin monitoring tool is available in EPEL repository. Use below command to as per your system.

For CentOS/RHEL 7:

64-Bit:
# rpm -Uvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-9.noarch.rpm

For CentOS/RHEL 6:

32-Bit:
# rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
64-Bit:
# rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

For CentOS/RHEL 5:

32-Bit:
# rpm -Uvh http://download.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
64-Bit:
# rpm -Uvh http://download.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm

Step 2: Install Apache Web Server

Munin requires web server like Apache or Nginx to see its statistics files.

# yum install httpd

After installing Apache, start apache and enable service to start it at boot time.

For CentOS/RHEL 7
# service httpd start
# chkconfig httpd on
CentOS/RHEL 6/5
# systemctl enable httpd.service
# systemctl start httpd.service

Step 3: Install Munin and Munin-Node

Munin is a web based Monitoring tool and installation of Munin is very simple. Run following command to install it.

# yum -y install munin munin-node

Munin installation creates following directories.

Step 4: Configure Munin

After installing munin now we need to configure munin using munin configuration file.

# vim /etc/munin/munin.conf

Uncomment below lines from munin configuration file.

dbdir   /var/lib/munin
htmldir /var/www/html/munin
logdir /var/log/munin
rundir  /var/run/munin

Also set system name in configuration file.

[srv.techoism.com]
address 127.0.0.1
use_node_name yes

Step 5: Protect Munin with Password

Now you need to protect your munin tool using password. Use below command to set the password.

# htpasswd -c /etc/munin/munin-htpasswd munin

Now start the munin service.

For CentOS/RHEL 7
# service munin-node start
# chkconfig munin-node on
CentOS/RHEL 6/5
# systemctl enable munin-node.service
# systemctl start munin-node.service

Step 6:Create Virtual Host

Creating the virtual host is optional. If you want to create the virtual host then only follow this step else skip the step and move to Step 7.

<VirtualHost *:80>
  ServerAdmin support@techoism.com
  DocumentRoot /var/www/html/munin
  ServerName munin.techoism.com
  ErrorLog /var/log/httpd/munin.techoism.com-error-log
  CustomLog /var/log/httpd/munin.techoism.com-acces-log common
<Directory "/var/www/html/munin">
    AllowOverride All
    Order Allow,Deny
    #Deny from all
    Allow from all
    </Directory>
</VirtualHost>

Step 7:Access Munin

Now you can access the munin web interface from your browser.

http://Domain-name/IPAddress/munin

Server statistics as a graph.

We hope that you have successfully installed Munin Network Monitoring tool.

Enjoy it!