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

Checking websites

Nagios ships with a very powerful check_http plugin that allows you to monitor websites in quite a simple way. This plugin should be enough for a large variety of tasks. However, there are often situations where only using this plugin is not enough.

If you are running a website that is critical to your business, only checking that the main page is showing up correctly may not be enough. In many cases, you might actually want to be sure that the users are able to log in, orders can be sent out, and reports can be generated correctly.

In such cases, it is not sufficient just to check if a couple of pages work correctly. It might be necessary to write a more complex check that will log you into the website, fill out an order form, send it, and verify that it shows up in the order history. You may also want to check that specified text is present on specific pages.

This task is very common when performing automated tests during the development of a site. Not many people perform...