Book Image

Nagios Core Administration Cookbook - Second Edition

By : Tom Ryder
Book Image

Nagios Core Administration Cookbook - Second Edition

By: Tom Ryder

Overview of this book

Nagios Core is an open source monitoring framework suitable for any network that ensures both internal and customer-facing services are running correctly and manages notification and reporting behavior to diagnose and fix outages promptly. It allows very fine configuration of exactly when, where, what, and how to check network services to meet both the uptime goals of your network and systems team and the needs of your users. This book shows system and network administrators how to use Nagios Core to its fullest as a monitoring framework for checks on any kind of network services, from the smallest home network to much larger production multi-site services. You will discover that Nagios Core is capable of doing much more than pinging a host or to see whether websites respond. The recipes in this book will demonstrate how to leverage Nagios Core's advanced configuration, scripting hooks, reports, data retrieval, and extensibility to integrate it with your existing systems, and to make it the rock-solid center of your network monitoring world.
Table of Contents (18 chapters)
Nagios Core Administration Cookbook Second Edition
About the Author
About the Reviewer

Creating an SNMP OID for monitoring

In this recipe, we'll learn how to configure a Net-SNMP snmpd server on a Linux server to return the output of a command in an SNMP OID. This can be useful as an alternative to NRPE monitoring for information that is not otherwise available in a checkable network service so that Nagios Core can check it via its standard check_snmp method.

As an example, this can be a very good way of monitoring hardware devices such as RAID arrays on remote servers, where command line diagnostic tools are available for reporting a status as a number or string, but those only work locally, and don't otherwise include any information in an SNMP MIB tree.

Getting ready

The host we intend to check should be running a Net-SNMP snmpd server that allows full read access to the MIB tree for a specified community string such as public. This SNMP server should be capable of using the exec directive in its configuration to return the output of a command as the value of an SNMP OID when...