Nagios: System and Network Monitoring

Wolfgang Barth9781593270704, 1-59327-070-4

Nagios: System and Network Monitoring shows how to configure and use Nagios, an open source system and network monitoring tool. Nagios makes it possible to continuously monitor network services (SMTP, POP3, HTTP, NNTP, PING, etc.), host resources (processor load, disk and memory usage, running processes, log files, etc.), and environmental factors (such as temperature). When Nagios detects a problem, it communicates the information to the sys admin via email, pager, SMS, or other user-defined method; current status information, historical logs, and reports can also be accessed via a web browser. Nagios System and Network Monitoring covers the Nagios core, all standard Nagios plug-ins and selected third-party plug-ins, and shows readers how to write their own plug-ins. The book covers Nagios 2.0 and is backwards compatible with earlier versions.

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Table of contents :
Nagios : system and network monitoring……Page 1
Contents……Page 6
Introduction……Page 16
1. Installation……Page 26
2. Nagios Configuration……Page 38
3. Startup……Page 62
4. Nagios Basics……Page 72
5. Service Checks and How They Are Performed……Page 80
6. Plugins for Network Services……Page 86
7. Testing Local Resources……Page 134
8. Manipulating Plugin Output……Page 156
9. Executing Plugins via SSH……Page 158
10. The Nagios Remote Plugin Executor (NRPE)……Page 166
11. Collecting Information Relevant for Monitoring with SNMP……Page 178
12. The Nagios Notification System……Page 216
13. Passive Tests with the External Command File……Page 240
14. The Nagios Service Check Acceptor (NSCA)……Page 248
15. Distributed Monitoring……Page 266
16. The Web Interface……Page 274
17. Graphic Display of Performance Data……Page 314
18. Monitoring Windows Servers……Page 354
19. Monitoring Room Temperature and Humidity……Page 378
20. Monitoring SAP Systems……Page 384
A. Rapidly Alternating States: Flapping……Page 402
B. Event Handlers……Page 410
C. Writing Your Own Plugins: Monitoring Oracle with the Instant Client……Page 416
D. An Overview of the Nagios Configuration Parameters……Page 424
Index……Page 448