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Learning Nagios 4

By : Wojciech Kocjan
Book Image

Learning Nagios 4

By: Wojciech Kocjan

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Learning Nagios 4
Wojciech Kocjan
Mar, 2014 | 400 pages
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Table of Contents (19 chapters)
Learning Nagios 4
Learning Nagios 4
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Introducing Nagios
Introducing Nagios
Understanding the basics of Nagios
Soft and hard states
What's new in Nagios 4.0
Summary
2
Installing Nagios 4
Installing Nagios 4
Installation
Configuring Nagios
Summary
3
Using the Nagios Web Interface
Using the Nagios Web Interface
Setting up the web interface
Using the web interface
Managing hosts
Managing services
Managing downtime
Managing comments
Nagios information
Generating reports
Changing the look of the Nagios web interface
Third-party Nagios web interfaces
Summary
4
Using the Nagios Plugins
Using the Nagios Plugins
Understanding how checks work
Monitoring using the standard network plugins
Monitoring the e-mail servers
Monitoring network services
Monitoring the database systems
Monitoring the storage space
Monitoring the resources
Monitoring other operations
Additional and third-party plugins
Summary
5
Advanced Configuration
Advanced Configuration
Creating maintainable configurations
Configuring the file structure
Defining the dependencies
Using the templates
Using the custom variables
Understanding flapping
Summary
6
Notifications and Events
Notifications and Events
Creating effective notifications
Understanding escalations
Sending commands to Nagios
Creating event handlers
Using adaptive monitoring
Summary
7
Passive Checks and NSCA
Passive Checks and NSCA
Understanding passive checks
Using NSCA
Summary
8
Monitoring Remote Hosts
Monitoring Remote Hosts
Monitoring over SSH
Monitoring using NRPE
Comparing NRPE and SSH
Alternatives to SSH and NRPE
Summary
9
Monitoring using SNMP
Monitoring using SNMP
Introducing SNMP
Working with SNMP and MIB
Setting up an SNMP agent
Using SNMP from Nagios
Summary
10
Advanced Monitoring
Advanced Monitoring
Monitoring Windows hosts
Understanding distributed monitoring
Using templates for distributed monitoring
Summary
11
Programming Nagios
Programming Nagios
Introducing Nagios customizations
Programming in C with libnagios
Creating custom active checks
Checking websites
Virtualization and clouds
Writing commands to send notifications
Managing Nagios
Summary
12
Using the Query Handler
Using the Query Handler
Introducing the query handler
Using the core service
Introducing Nagios Event Radio Dispatcher
Summary
Index
Index

Configuring the file structure

A very important issue is how to store all our configuration files. We can put every object definition in a single file, but this will not make it easy to manage. As mentioned in Chapter 2, Installing Nagios 4, it is recommended to store different types of objects in separate folders.

Assuming your Nagios configuration is in /etc/nagios, it is recommended that you create folders for all types of objects in the following manner:

/etc/nagios/commands
/etc/nagios/timeperiods
/etc/nagios/contacts
/etc/nagios/hosts
/etc/nagios/services

Of course, these files will need to be added to the nagios.cfg file. After having followed the instructions in Chapter 2, Installing Nagios 4, these directories should already be added to our main Nagios configuration file.

It would also be worthwhile to use a version control mechanism such as Git (visit http://www.git-scm.com/), Hg (Mercurial, visit http://mercurial.selenic.com/) or SVN (Subversion, visit http://subversion.tigris...

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