Book Image

Nagios Core Administration Cookbook - Second Edition

By : Tom Ryder
Book Image

Nagios Core Administration Cookbook - Second Edition

By: Tom Ryder

Overview of this book

Nagios Core is an open source monitoring framework suitable for any network that ensures both internal and customer-facing services are running correctly and manages notification and reporting behavior to diagnose and fix outages promptly. It allows very fine configuration of exactly when, where, what, and how to check network services to meet both the uptime goals of your network and systems team and the needs of your users. This book shows system and network administrators how to use Nagios Core to its fullest as a monitoring framework for checks on any kind of network services, from the smallest home network to much larger production multi-site services. You will discover that Nagios Core is capable of doing much more than pinging a host or to see whether websites respond. The recipes in this book will demonstrate how to leverage Nagios Core's advanced configuration, scripting hooks, reports, data retrieval, and extensibility to integrate it with your existing systems, and to make it the rock-solid center of your network monitoring world.
Table of Contents (18 chapters)
Nagios Core Administration Cookbook Second Edition
About the Author
About the Reviewer

Specifying how frequently to check a host or service

In this recipe, we'll adjust the definition of a very important host to ensure that it checks whether the host is up in every three minutes and, if it finds that the host is down as a result of the check failing, it will check again after a minute before it sends a notification about the state to its defined contact. We'll do this by customizing the definition for an existing host.

Getting ready

You should have a Nagios Core 4.0 or newer server with at least one host configured already. We'll use the example of, a host defined in its own file.

You should also understand the basics of commands and plugins, in particular the meaning of the check_command directive. These are covered in the recipes in Chapter 2, Working with Commands and Plugins.

How to do it...

We can customize the check frequency for a host as follows:

  1. Change to the objects configuration directory for Nagios Core. The default location for the objects for the...