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  • Book Overview & Buying Learning Nagios 3.0
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Learning Nagios 3.0

Learning Nagios 3.0

4.2 (5)
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Learning Nagios 3.0

Learning Nagios 3.0

4.2 (5)
Buy this Book

Overview of this book

Table of Contents (16 chapters)
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Learning Nagios 3.0
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Learning Nagios 3.0
Credits
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Credits
About the Author
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About the Author
About the Reviewer
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About the Reviewer
Preface
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Preface
Lock Free Chapter
1
Introduction
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Introduction
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Introduction to Nagios
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Benefits of Monitoring Resources
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Main Features
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Soft and Hard States
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What's New in Nagios 3.0?
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Summary
2
Installation and Configuration
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Installation and Configuration
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Installation
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Nagios Configuration
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Summary
3
Using the Nagios Web Interface
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Using the Nagios Web Interface
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Setting up the Web Interface
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Using the Web Interface
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Managing Hosts
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Managing Services
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Managing Downtimes
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Managing Comments
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Nagios Information
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Reports
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Summary
4
Overview of Nagios Plugins
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Overview of Nagios Plugins
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Standard Network Plugins
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Monitoring Email Servers
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Monitoring Network Services
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Monitoring Database Systems
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Storage Space
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Resource Monitoring
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Miscellaneous Plugins
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Summary
5
Advanced Configuration
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Advanced Configuration
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Maintainable Configurations
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Configuration File Structure
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Defining Dependencies
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Using Templates
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Custom Variables
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Flapping
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Summary
6
Notifications and Events
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Notifications and Events
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Effective Notifications
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Escalations
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External Commands
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Event Handlers
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Modifying Notifications
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Adaptive Monitoring
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Summary
7
Passive Checks and NSCA
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Passive Checks and NSCA
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What are Passive Checks?
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Configuring Passive Checks
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Passive Checks — Hosts
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Passive Checks — Services
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Troubleshooting Passive Checks
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What is NSCA?
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Obtaining NSCA
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Compiling NSCA
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Configuring the NSCA Server
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Sending results over NSCA
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Security Concerns
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Summary
8
Monitoring Remote Hosts
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Monitoring Remote Hosts
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Monitoring over SSH
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Configuring SSH
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Using the check_by_ssh Plugin
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Performing Multiple Checks
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Troubleshooting SSH-Based Checks
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Introduction to NRPE
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Obtaining NRPE
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Compiling NRPE
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Configuring the NRPE Daemon
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Installing NRPE as a System Service
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Configuring Nagios for NRPE
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NRPE and Command Arguments
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Other Approaches
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Troubleshooting NRPE
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Summary
9
SNMP
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SNMP
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Introduction to SNMP
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Data Objects
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Working with SNMP and MIB
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Graphical Tools
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Setting up an SNMP Agent
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Using SNMP from Nagios
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Receiving Traps
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Additional Plugins
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Summary
10
Advanced Monitoring
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Advanced Monitoring
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Monitoring Windows Hosts
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NSClient++
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Performing Tests via check_nt
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Performing Checks with NRPE Protocol
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Passive Checks using NSCA Protocol
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Distributed Monitoring
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Obsessive Notifications
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Configuring Nagios Instances
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Freshness Checking
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Summary
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Extending Nagios
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Extending Nagios
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Introduction
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Active Checks
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Writing Plugins the Right Way
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Checking Websites
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Monitoring VMware
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Your Own Notifications
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Managing Nagios
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Using Passive Checks
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Summary

Data Objects

SNMP uses OIDs (Object Identifiers; see http://en.wikipedia.org/wiki/Object_identifier) to identify the data objects that it refers to. OIDs define a unique object for a specified SNMP agent. They are identified using a hierarchical definition, similar to how domains work on the Internet.

Object identifiers are a series of numbers separated by periods. Each number represents a part of the tree. Often, the first number in the series is also preceded by a period to indicate that this is an OID — this is not necessary, though. An example of an OID is .1.3.6.1.2.1.1.5.0, which maps to the system name of a machine.

As it is very hard to memorize, read and compare OIDs written as a series of numbers, there is a standard for naming and describing the MIB tree.

The standard is called MIB (Management Information Base; see http://en.wikipedia.org/wiki/Management_Information_Base), and it defines how various parameters are defined — how they are named, as well as what types of values these...

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Learning Nagios 3.0
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