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

Changing thresholds for PING RTT and packet loss


In this recipe, we'll set up a service for a host that monitors PING and take a look at how to adjust the thresholds for the WARNING and CRITICAL states, which is done using command arguments. We'll accomplish this by setting up a service for an existing host that's already being checked with a check_command, such as check-host-alive. Our service will be used to monitor not whether the host is completely down, but whether it's responding to PING requests within a reasonable period of time.

This could be useful to notify and assist in diagnosing problems with the actual connectivity of a service or host.

This recipe will therefore serve as a good demonstration of the concepts of supplying arguments to a command and adjusting the WARNING and CRITICAL thresholds for a particular service.

Getting ready

You should have a Nagios Core 4.0 or newer server with at least one host configured already and have used a check_command of check-host-alive. We'll...