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


Nagios Core is perhaps best thought of less as a monitoring tool and more as a monitoring framework. Its modular design allows any kind of program that returns appropriate values based on some kind of check as a check_command for a host or service, for use to ensure that a host or service is still responsive and functioning correctly. This is where the concepts of commands and plugins come into play.

For Nagios Core, a plugin is any program that can be used to gather information about a host or service. To ensure that a host is responding to PING requests, we'd use a plugin such as check_ping, which when run against a hostname or address—whether by Nagios Core or not—returns a status code to whatever called it, based on whether a response was received to the PING request within a certain period of time. This status code and any accompanying message is what Nagios Core uses to establish what state a host or service is in.

Plugins are generally just like any other program on a...