Book Image

Cacti Beginner's Guide - Second Edition

Book Image

Cacti Beginner's Guide - Second Edition

Overview of this book

Cacti is a performance measurement tool that provides easy methods and functions for gathering and graphing system data. You can use Cacti to develop a robust event management system that can alert on just about anything you would like it to. But to do that, you need to gain a solid understanding of the basics of Cacti, its plugin architecture, and automation concepts. Cacti Beginner's Guide will introduce you to the wide variety of features of Cacti and will guide you on how to use them for maximum effectiveness. Advanced topics such as the plugin architecture and Cacti automation using the command-line interface will help you build a professional performance measurement system. Designed as a beginner's guide, the book starts off with the basics of installing and using Cacti, and also covers the advanced topics that will show you how to customize and extend the core Cacti functionalities. The book offers essential tutorials for creating advanced graphs and using plugins to create enterprise-class reports to show your customers and colleagues. From data templates to input methods and plugin installation to creating your own customized plugins, this book provides you with a rich selection of step-by-step instructions to reach your goals. It covers all you need to know to implement professional performance measurement techniques with Cacti and ways to fully customize Cacti to fit your needs. You will also learn how to migrate Cacti to new servers. Lastly you will also be introduced to the latest feature of building a scalable remote poller environment. By the end of the book, you will be able to implement and extend Cacti to monitor, display, and report the performance of your network exactly the way you want.
Table of Contents (24 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
15
Online Resources

Defining a data source template


You are now going to define a data source template for the host MIBhrSystemProcesses. Although a data template already exists for this, it provides a good example of how to create SNMP-based data templates. For this to work, let's assume that your CentOS-based Cacti server is already configured with an SNMP daemon. You can check your box with the following command:

[root@localhost ~]# snmpwalk -On -c public -v 2c localhost HOST-RESOURCES-MIB::hrSystemProcesses.0.1.3.6.1.2.1.25.1.6.0 = Gauge32: 432

Time for action - defining a data source template

The hrSystemProcesses MIB provides information on the current number of running processes on a system supporting the host resource MIB. This MIB is a collection of system-specific data such as logged in users, disk space, installed software packages, and other valuable information that can be retrieved using SNMP:

  1. Log on to your Cacti system and go to Templates | Data Source.
  2. Click the Add link at the top-right corner...