Book Image

Nagios Core Administration Cookbook

By : Tom Ryder
Book Image

Nagios Core Administration Cookbook

By: Tom Ryder

Overview of this book

Network monitoring requires significantly more than just pinging hosts. This cookbook will help you to comprehensively test your networks' major functions on a regular basis."Nagios Core Administration Cookbook" will show you how to use Nagios Core as a monitoring framework that understands the layers and subtleties of the network for intelligent monitoring and notification behaviour. Nagios Core Administration Guide introduces the reader to methods of extending Nagios Core into a network monitoring solution. The book begins by covering the basic structure of hosts, services, and contacts and then goes on to discuss advanced usage of checks and notifications, and configuring intelligent behaviour with network paths and dependencies. The cookbook emphasizes using Nagios Core as an extensible monitoring framework. By the end of the book, you will learn that Nagios Core is capable of doing much more than pinging a host or to check if websites respond.
Table of Contents (18 chapters)
Nagios Core Administration Cookbook
About the Author
About the Reviewers

Using check_by_ssh with key authentication instead of NRPE

While all of the previous recipes in this chapter show that NRPE can be very effectively tied down and secured, it may be that we require some means of authentication to a target host in order to run the appropriate Nagios plugins on it. The nrpe daemon does not require any authentication to return information about the host's state; as long as the IP addresses all match, and the command is defined for running, it will return information.

If you already use SSH keys for a public key infrastructure in your network, then you may find it preferable to use the check_by_ssh plugin instead, which allows you to use public keys to authenticate with a target host before running any commands. This is only suitable if the target host runs an ssh daemon.

In this recipe, we'll repeat the setup for the check_load plugin as done in the first recipe in this chapter, Monitoring local services on a remote machine with NRPE, but we'll use the check_by_ssh...