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  • Book Overview & Buying Nagios Core Administration Cookbook
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Nagios Core Administration Cookbook

Nagios Core Administration Cookbook

By : Tom Ryder
4.6 (9)
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Nagios Core Administration Cookbook

Nagios Core Administration Cookbook

4.6 (9)
By: Tom Ryder

Overview of this book

Network monitoring requires significantly more than just pinging hosts. This cookbook will help you to comprehensively test your networks' major functions on a regular basis."Nagios Core Administration Cookbook" will show you how to use Nagios Core as a monitoring framework that understands the layers and subtleties of the network for intelligent monitoring and notification behaviour. Nagios Core Administration Guide introduces the reader to methods of extending Nagios Core into a network monitoring solution. The book begins by covering the basic structure of hosts, services, and contacts and then goes on to discuss advanced usage of checks and notifications, and configuring intelligent behaviour with network paths and dependencies. The cookbook emphasizes using Nagios Core as an extensible monitoring framework. By the end of the book, you will learn that Nagios Core is capable of doing much more than pinging a host or to check if websites respond.
Table of Contents (18 chapters)
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Nagios Core Administration Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1
Index

Establishing a host dependency


In this recipe, we'll learn how to establish a host dependency between two hosts. This feature can be used to control how Nagios Core checks hosts and notifies us about problems in situations where if one host is DOWN, it implies that at least one other host is necessarily DOWN.

Getting ready

First of all, it's very important to note that this is not quite the same thing as a host being UNREACHABLE, which is what the parents directive is for, as discussed in the Creating a network host hierarchy recipe in this chapter. Most of the time, a host actually being DOWN does not mean that other hosts actually go DOWN by definition. It's more typical for a child host to simply be UNREACHABLE; it might be working fine, but Nagios Core can't check it because of the DOWN host in its path.

However, there's one particularly broad category where host dependencies are definitely useful: the host/guest relationship of virtual machines. If you are monitoring both a host physical...

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