Book Image

Cacti 0.8 Beginner's Guide

By : Thomas Urban
Book Image

Cacti 0.8 Beginner's Guide

By: Thomas Urban

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 0.8 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 like 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. 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 (23 chapters)
Cacti 0.8Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Pop Quiz Answers
Index

Time for action – adding a legend


  1. The graph is still missing the Legend, so click on the Add link of the Graph Template Items again.

  2. Select Comment as the Graph Item Type.

  3. Enter Running Processes into the Text Format field.

  4. Click on the Create button.

  5. Let's add some more statistical information to your Legend. Click on the Add link.

  6. Select Legend as the Graph Item Type.

  7. Click on the Create button.

What just happened?

You have added a comment describing the statistical information relating to the graph. The Legend command adds three GPRINT statements to the graph. The first GPRINT statement prints the last polled value, the second statement prints the average value of the displayed graph and the last one prints the maximum value polled.

You can now assign this graph template to a device. After you have added the graph template to a device, you need to wait for three polls to pass. The first poll actually creates the necessary RRD file. The other two polls are needed for the RRDtool as it will start...