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

Building groups using regular expressions

In this recipe, you'll learn a shortcut to building groups of hosts using regular expressions tested against their hostnames.

This recipe is likely only of use to you if you use a naming convention for your hosts that allows them to be reasonably grouped by location, function, or some other useful metric by a shared string in their hostnames.

Getting ready

You will need to have a server running Nagios Core 4.0 or later, have access to the command line to change its configuration, and understand the basics of how host and servicegroups work. These are covered in the Creating a new hostgroup and Creating a new servicegroup recipes in Chapter 1, Understanding Hosts, Services, and Contacts.

In this example, we'll group three existing hosts named web-server-01, web-server-02, and web-server-03 into a new hostgroup, web-servers, based only on their hostnames.

It would help to have some familiarity with regular expressions, but the recipe includes a simple example...