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
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Checking that a website returns a given string


In this recipe, we'll build on the basic web service monitoring established in the recipe Monitoring web services in this chapter and learn how to create a command that uses the check_http plugin to ensure that a particular string is included as part of an HTTP response.

By default, there's no Nagios Core command defined to use the plugin in this way, so the recipe will include defining a command before using it as part of a service check.

This may be necessary if we're monitoring a website on a server that may not necessarily return a 404 Not Found or similar error that will flag a WARNING or CRITICAL in Nagios; rather than merely checking if a document was found, we can check whether it matches a string to see if it resembles the particular document we expected.

This kind of setup is a nice complement to a suite of code unit tests for a website or web application.

Getting ready

You should have a Nagios Core 4.0 or newer server with at least one...