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NagCat README ============= INTRODUCTION ------------ NagCat is a configuration based monitoring framework intended for use with Nagios 3.x. NagCat uses tests defined in a coil configuration file and runs them against hosts defined in Nagios, submitting results as passive tests to Nagios. Each test run by NagCat translates to one service defined in Nagios. This is a significant departure from the normal mode of operation for Nagios which requires it to schedule and run independent scripts (aka active checks) to check each service it is monitoring. The primary purpose of this approach is to ensure that adding more tests for a service imposes a minimal impact. By running as a separate daemon NagCat has the ability to group tests together that make the same query to a service and run different checks against the return data. For example you may want to write two tests that both query Apache's server-status page, one test checks the number of threads working threads, another checks the number of requests per second. These two tests can be represented in Nagios as two different services and thus can send out alerts independently. NagCat will automatically schedule these two tests to run at the same time, running the two tests against the data returned by a single request to Apache. For such a simple example this may not be critical but it can be on a large and complex system that requires many many different tests to ensure that it is functioning properly. FEATURES -------- * Smart scheduling to reduce the number of queries required. * Tests defined in a declarative config format, improving maintainability of tests by making them easy to read and avoiding the potential mess that may grow if they were all written as individual Nagios plugins. * Detailed reports with embedded documentation to give the person responding to an alert the info the need to investigate the issue even if they do not have extensive experience with the system. * Tests or sub-tests can be defined to run at different intervals. * Set different alert thresholds based on the time. REQUIREMENTS ------------ Strict requirements: - Python >= 2.4 (>= 2.5 recommended) - Twisted >= 8.2 - Coil 0.3.x >= 0.3.14 http://code.google.com/p/coil Optional: - PyOpenSSL (for HTTPS support) - netsnmp (for SNMP support) - lxml (for XPath filter support) - rrdtool (for graphing) - cx_Oracle DOCUMENTATION ------------- Further documentation on the usage and implementation of NagCat can be found in the docs directory. If you are too lazy to cd into the docs directory and just want to get started try this: bin/nagcat -c docs/example.coil -t http_title -H www.w3.org -P 80 CREDITS ------- NagCat is maintained by Michael Marineau <firstname.lastname@example.org> with the help of fellow ITA Software employees and licensed under the Apache License, Version 2.0.