Book Image

Learning Nagios - Third Edition

By : Wojciech Kocjan, Piotr Beltowski
Book Image

Learning Nagios - Third Edition

By: Wojciech Kocjan, Piotr Beltowski

Overview of this book

Nagios, a powerful and widely used IT monitoring and management software for problem -solving. It detects problems related to your organizations infrastructure and helps in resolving the issue before it impacts the business. Following the success of the previous edition, this book will continue to help you monitor the status of network devices and also notify the system administrators of network problems. Starting with the fundamentals, the book will teach you how to install and configure Nagios for your environment. The book helps you learn how to end downtimes, adding comments and generating reports using the built-in Web interface of Nagios. Moving on, you will be introduced to the third-party web interfaces and applications for checking the status and report specific information. As you progress further in Learning Nagios, you will focus on the standard set of Nagios plugins and also focus on teach you how to efficiently manage large configurations and using templates. Once you are up to speed with this, you will get to know the concept and working of notifications and events in Nagios. The book will then uncover the concept of passive check and shows how to use NRDP (Nagios Remote Data Processor). The focus then shifts to how Nagios checks can be run on remote machines and SNMP (Simple Network Management Protocol) can be used from Nagios. Lastly, the book will demonstrate how to extend Nagios by creating custom check commands, custom ways of notifying users and showing how passive checks and NRDP can be used to integrate your solutions with Nagios. By the end of the book, you will be a competent system administrator who could monitor mid-size businesses or even large scale enterprises.
Table of Contents (19 chapters)
Learning Nagios - Third Edition
About the Authors
About the Reviewer


Nagios has many places where it can be extended with external scripts or applications. Although we used JavaScript in code samples, Nagios is not bound to any specific language and its real power comes from the fact that you can choose the language you'll use to program your code. Of course, this chapter does not cover all of the aspects in which Nagios can be customized.

In this chapter you learned the following:

  • Which aspects of Nagios can be customized

  • How to write plugins that perform active checks

  • Sending custom notifications

  • Managing Nagios and reading its status information

  • Working with passive checks for long running tests

  • What the query handler is, what services it offers, and how to communicate with them

  • How to use the NERD service to receive real-time notifications

This chapter concludes the book. You are encouraged to run the examples that were shown throughout the book as well as experiment on your own with Nagios. We hope that the book will be the beginning of your journey into...