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

Writing a new plugin from scratch

Given the very useful standard plugins in the Nagios Plugins set and the large number of custom plugins available on Nagios Exchange, occasionally, as our monitoring setup grows more refined, we may well find that there is a service or property of a host that we would like to check. However, for this, there doesn't seem to be any suitable plugin available. Every network is different and, sometimes, the plugins that others have made by generously donating their time to the community don't quite cover all your bases. Generally, the more specific your monitoring requirements get, the less likely it is that there's a plugin available that does exactly what you need.

In this example, we'll deal with a very particular problem that we'll assume can't be dealt with effectively by any known Nagios Core plugins, and we'll write one ourselves using Perl. Here's the example problem.

Our Linux security team wants to be able to automatically check whether any of our servers...