Munin on CentOS 7

Munin is an open-source network monitoring tool that helps you monitor various aspects of your systems, such as CPU usage, memory usage, disk usage, network traffic, and more. It is designed to be simple to set up and use, making it a popular choice for sysadmins and network administrators.

Here's a step-by-step guide on how to install Munin on CentOS 7:

1. Update your system: sudo yum update
2. Install Munin and its dependencies: sudo yum install munin
3. Configure Munin by editing the main configuration file: sudo vi /etc/munin/munin.conf
4. Make sure the following settings are correct:
   • dbdir /var/lib/munin - The directory where Munin stores its data files.
   • htmldir /var/www/html/munin - The location where the Munin web interface will be served from.
   • logdir /var/log/munin - The directory where Munin stores its log files.
5. Configure Apache to serve the Munin web interface:

      ServerAdmin webmaster@localhost   DocumentRoot /var/www/html/munin         Options FollowSymLinks     AllowOverride None     Require all granted       ErrorLog /var/log/httpd/munin.error.log   CustomLog /var/log/httpd/munin.access.log combined        

   • Create a new Apache virtual host file for Munin:
     sudo vi /etc/httpd/conf.d/munin.conf
   • Add the following configuration:
   • Save and close the file.
6. Restart Apache service: sudo systemctl restart httpd
7. Start Munin service and enable it to start on boot: sudo systemctl start munin and sudo systemctl enable munin

Once you have completed the above steps, you should be able to access the Munin web interface by opening your web browser and navigating to http://your_server_ip/munin/. You'll find a wealth of information about your system's performance and usage displayed in easy-to-understand graphs and charts.