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

Adjusting flapping percentage thresholds for a service


In this recipe, we'll learn how to adjust the percentage thresholds for a host's or service's flap detection. This means that we can adjust how frequently a host or service has to change its state within its last 21 checks before Nagios Core concludes it's flapping and suppresses notifications until its state becomes stable again.

Getting ready

You should have a Nagios Core 4.0 or newer server with at least one host and one service configured already. You should also have access to a working web interface for the Nagios Core server.

You should be familiar with the way hosts and services change their state as a result of their checks and the different states corresponding to hosts and services, to understand the basics of how flap detection works. Flap detection should also already be enabled and working for the appropriate hosts and services.

How to do it...

We can adjust the thresholds for flap detection for a specific host or service as...