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Download Building a Monitoring Infrastructure with Nagios by David Josephsen PDF

By David Josephsen

Build real-world, end-to-end community tracking ideas with Nagios


This is the definitive consultant to development reasonably cheap, enterprise-strength tracking infrastructures with Nagios, the world’s best open resource tracking device. community tracking expert David Josephsen is going a long way past the fundamentals, demonstrating easy methods to use third-party instruments and plug-ins to unravel the categorical difficulties on your precise atmosphere. Josephsen introduces Nagios “from the floor up,” exhibiting the right way to plan for achievement and leverage today’s most respected tracking most sensible practices. Then, utilizing useful examples, genuine directives, and dealing code, Josephsen provides designated tracking strategies for home windows, Unix, Linux, community gear, and different structures and units. You’ll locate thorough discussions of complex themes, together with using information visualization to unravel advanced tracking difficulties. this can be additionally the 1st Nagios booklet with accomplished assurance of utilizing Nagios occasion dealer to remodel and expand Nagios.

  • Understand how Nagios works, extensive: the host and repair paradigm, plug-ins, scheduling, and notification
  • Configure Nagios effectively: config documents, templates, timeperiods, contacts, hosts, companies, escalations, dependencies, and extra
  • Streamline deployment with scripting templates, computerized discovery, and Nagios GUI instruments
  • Use plug-ins and instruments to systematically video display the units and structures you must visual display unit, how you have to visual display unit them
  • Establish front-ends, visible dashboards, and administration interfaces with MRTG and RRDTool
  • Build new C-based Nagios occasion dealer (NEB) modules, one step at a time
  • Contains easy-to-understand code listings in Unix shell, C, and Perl


If you’re accountable for structures tracking infrastructure in any association, huge or small, this e-book may also help you in attaining the consequences you want–right from the beginning.


David Josephsen is Senior platforms Engineer at DBG, Inc., the place he continues a suite of geographically dispersed server farms. He has greater than a decade of hands-on adventure with Unix platforms, routers, firewalls, and cargo balancers in help of advanced, high-volume networks. Josephsen’s certifications contain CISSP, CCNA, CCDA, and MCSE. His co-authored paintings on Bayesian junk mail filtering earned a most sensible Paper award at USENIX LISA 2004. He has been released in either ;login and Sysadmin magazines on issues with regards to defense, platforms tracking, and junk mail mitigation.


Introduction bankruptcy 1 top Practices bankruptcy 2 idea of Operations bankruptcy three fitting Nagios bankruptcy four Configuring Nagios bankruptcy five Bootstrapping the Configs bankruptcy 6 staring at bankruptcy 7 Visualization bankruptcy eight Nagios occasion dealer Interface APPENDIX A Configure strategies APPENDIX B nagios.cfg and cgi.cfg APPENDIX C Command-Line recommendations Index


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Which service and host definitions refer to, to derive their hours of operation. Service definitions refer to time periods in two ways. The notification period defines the hours within which Nagios is allowed to send notifications for the service, and the check period defines the period of time Nagios may schedule checks of the service. Nagios isn’t just a monitoring system; it’s also an information collection program. Nagios can collect utilization and status information from anything it monitors and pass this information along to other programs for graphing or data mining.

Even if slippage occurs, Nagios uses the initially scheduled time to calculate the next execution time, rather than the time the plugin was actually run. If the schedule has slipped so badly that the current time is already past the normal check interval, Nagios reschedules the plugin. Second, the plugin sometimes takes longer to return than expected, due to network delays or high utilization. In the event that the plugin execution time exceeds the normal check interval, Nagios will reschedule the plugin.

Com. Eventually, you will want either to write your own plugin or to reuse some existing scripts as Nagios plugins, and doing so couldn’t be easier. 1. 1 Nagios Plugin Exit Codes Code Meaning 0 Ok 1 Warning 2 Critical 3 Unknown 19 Plugins Providing an exit code is, literally, the sole requirement by which a plugin must abide. Any programming or scripting language that provides an exit code (every programming and scripting language can provide exit codes) can be used to write a Nagios plugin. html page ■ Compare that bit of information against an expected state or threshold ■ Provide an exit code describing the outcome of that comparison Plugins are specified in service definitions, along with other details, such as the name of the service and how often to execute a check.

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