Book Image

Learning Nagios - Third Edition

By : Wojciech Kocjan, Piotr Beltowski
Book Image

Learning Nagios - Third Edition

By: Wojciech Kocjan, Piotr Beltowski

Overview of this book

Nagios, a powerful and widely used IT monitoring and management software for problem -solving. It detects problems related to your organizations infrastructure and helps in resolving the issue before it impacts the business. Following the success of the previous edition, this book will continue to help you monitor the status of network devices and also notify the system administrators of network problems. Starting with the fundamentals, the book will teach you how to install and configure Nagios for your environment. The book helps you learn how to end downtimes, adding comments and generating reports using the built-in Web interface of Nagios. Moving on, you will be introduced to the third-party web interfaces and applications for checking the status and report specific information. As you progress further in Learning Nagios, you will focus on the standard set of Nagios plugins and also focus on teach you how to efficiently manage large configurations and using templates. Once you are up to speed with this, you will get to know the concept and working of notifications and events in Nagios. The book will then uncover the concept of passive check and shows how to use NRDP (Nagios Remote Data Processor). The focus then shifts to how Nagios checks can be run on remote machines and SNMP (Simple Network Management Protocol) can be used from Nagios. Lastly, the book will demonstrate how to extend Nagios by creating custom check commands, custom ways of notifying users and showing how passive checks and NRDP can be used to integrate your solutions with Nagios. By the end of the book, you will be a competent system administrator who could monitor mid-size businesses or even large scale enterprises.
Table of Contents (19 chapters)
Learning Nagios - Third Edition
About the Authors
About the Reviewer

Nagios information

The web interface allows us to check the Nagios daemon status along with general information on features enabled and disabled. It also allows to check the performance information related to Nagios. This can be used to make sure that your Nagios is not overloaded with checks to perform as well as see how much time checks take and how often they're performed.

Viewing process information

The Nagios Process Information page shows generic information about the Nagios process. It also allows performing several actions from the Process Commands panel. This page can be accessed via the Process Info link from the menu on the left.

The following is a screenshot of the page:

The page contains information on the Nagios version, process ID, status, and log rotation. It also shows whether checks, notifications, and many other functions are enabled.

The menu on the right also allows us to stop and restart the Nagios daemon. It also allows us to enable and disable performing checks by sending...