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

Defining a custom notification method


In this recipe, we'll learn how to specify an alternative method for a contact to receive notifications about a service. A very typical method for a contact to receive notifications is by being sent an e-mail to their contact address; e-mail messages could be sent to an inbox or a paging device.

However, notifications are just text; we can arrange to deal with them via any command we wish, in much the same way we can configure host or service checks. In this recipe, we'll set up a new contact called motd, which, when it receives notifications, will write them into the server's /etc/motd to be displayed on login.

Getting ready

You should have a Nagios Core 4.0 or newer server, with at least one host or service configured already. You should understand how notifications are generated and their default behavior in being sent to the contacts and contact_groups for hosts or services.

We'll use the example of a host called troy.example.net, configured to send...