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

Creating a new command

In this recipe, we'll create a new command for a plugin that was just installed into the /usr/local/nagios/libexec directory in the Nagios Core server. This will define the way in which Nagios Core should use the plugin and thereby allow it to be used as part of a service definition.

Getting ready

You should have a Nagios Core 4.0 or newer server running with a few hosts and services configured already, and you should have a plugin installed for which you'd like to define a new command so that you can use it as part of a service definition. In this instance, we'll define a command for an installed check_rsync plugin.

How to do it...

We can define a new command in our configuration as follows:

  1. Change to the directory containing the command configuration files for Nagios Core. The default file is commands.cfg, located in /usr/local/nagios/etc/objects:

    # cd /usr/local/nagios/etc/objects
  2. Edit the commands.cfg file:

    # vi commands.cfg
  3. At the bottom of the file, add the following...