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

Monitoring database systems

Databases allow the storage of information that is used often by entire departments or whole companies. Because most systems usually depend on one or more databases, a failure in these databases can cause all of the underlying systems to go down as well. Imagine a business critical database failure that went unnoticed over a weekend, making both the company's website as well as e-mail unavailable. That would be a disaster! A series of scheduled reports that was supposed to be sent out would fail to be generated because of this.

This is why, making sure that databases are working correctly and have enough resources to operate might be essential for many companies. Many enterprise-class databases also have table space capacity management, which should also be monitored—even though a valid user may be able to log in, this does not necessarily mean that a database is up and running correctly.

Checking MySQL

One of the most commonly used database types is MySQL. It is...