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

Submitting passive checks in response to SNMP traps

In this recipe, you'll learn how to configure Nagios Core to process SNMP traps, which is information sent by monitored network devices to a central monitoring server.

Because SNMP traps often contain useful or urgent information about how a host is working, processing them in at least some way can be very helpful. It can be very helpful particularly for firmware network devices that can't use send_nsca to submit a passive check result in a standard form, as explained in the Submitting passive checks from a remote host with NSCA recipe.

As an example, most SNMP-capable hosts can be configured to send SNMP traps when one of their network interfaces changes state, perhaps due to a pulled network cable. These traps are known as linkUp and linkDown traps. Monitoring this particular kind of trap is especially useful for devices with a large number of interfaces, such as switches or routers.

Keeping track of these events in Nagios Core is valuable...