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

Writing debugging information to the Nagios log file


In this recipe, you'll learn how to use the debugging log file in Nagios Core to get various kinds of process information from the running program, considerably more than available in the standard log_file. This is useful not just for debugging purposes when Nagios Core is doing something unexpected at runtime, but it is also useful to get a better idea of how the server is working in general and with your particular configuration.

Getting ready

You will need a Nagios Core server with version 4.0 or greater. You will need access to change the nagios.cfg file and to restart the server.

In this example, we'll simply log everything we possibly can and then explain how to refine the logging behavior if necessary in the How it works section.

How to do it...

We can enable very verbose debugging for our monitoring server as follows:

  1. Change to the configuration directory for Nagios Core. In the default installation, the location is /usr/local/nagios...