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


Our Nagios setup is now complete and ready to be configured! We have covered various ways to get Nagios up and running—both from source code and using prebuilt binary packages. In this chapter, you also learned how to run Nagios in virtualizations such as containers and virtual machines.

If you have used the automated script for setting up Nagios, which we strongly recommend, the key system paths to keep in mind are as follows :

  • /opt/nagios: This is where Nagios binaries and HTML files were installed

  • /opt/nagios/plugins: This is where Nagios plugins are installed

  • /etc/nagios:  All configuration files should be placed here

  • /var/nagios:  This is where Nagios will keep its local state

If you have used a different method for setting up Nagios, such as using the prebuilt packages, please keep in mind that these are the paths that are used throughout the rest of this book and may need adjusting for your particular installation.

The next chapter will guide you through the Nagios configuration...