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Building a Monitoring Infrastructure with Nagios by David Josephsen

By David Josephsen

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


This is the definitive consultant to construction reasonably cheap, enterprise-strength tracking infrastructures with Nagios, the world’s top open resource tracking software. community tracking expert David Josephsen is going a long way past the fundamentals, demonstrating tips on how to use third-party instruments and plug-ins to unravel the categorical difficulties on your detailed surroundings. Josephsen introduces Nagios “from the floor up,” exhibiting the best way to plan for achievement and leverage today’s most useful tracking top practices. Then, utilizing useful examples, genuine directives, and dealing code, Josephsen provides precise tracking strategies for home windows, Unix, Linux, community apparatus, and different systems and units. You’ll locate thorough discussions of complicated issues, together with using info visualization to unravel complicated tracking difficulties. this is often additionally the 1st Nagios e-book with entire insurance of utilizing Nagios occasion dealer to rework and expand Nagios.

  • Understand how Nagios works, extensive: the host and repair paradigm, plug-ins, scheduling, and notification
  • Configure Nagios effectively: config records, templates, timeperiods, contacts, hosts, companies, escalations, dependencies, and extra
  • Streamline deployment with scripting templates, automatic discovery, and Nagios GUI instruments
  • Use plug-ins and instruments to systematically video display the units and systems you must computer screen, how you have to computer screen 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 chargeable for platforms tracking infrastructure in any association, huge or small, this e-book can assist you in achieving the consequences you want–right from the beginning.


David Josephsen is Senior platforms Engineer at DBG, Inc., the place he keeps a set of geographically dispersed server farms. He has greater than a decade of hands-on adventure with Unix structures, routers, firewalls, and cargo balancers in aid of complicated, high-volume networks. Josephsen’s certifications comprise CISSP, CCNA, CCDA, and MCSE. His co-authored paintings on Bayesian junk mail filtering earned a top Paper award at USENIX LISA 2004. He has been released in either ;login and Sysadmin magazines on themes on the subject of defense, structures tracking, and unsolicited mail mitigation.


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


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After you grasp a few fundamental concepts, you will feel completely empowered to go forth and build the monitoring system your Openview friends can only dream about. ” The piece-meal approach usually happens when a sysadmin has just been burned by an important service or application. The service in question has gone down, and the admin found out about it from his customers or manager, creating the perception that he’s not aware of what’s happening with his systems. Sysadmins are a proactive bunch, so before too long, our admin has a group of scripts that he runs against his servers.

The service check that was forked will execute a plugin and place its error code and output in a message queue until an event called a reaper comes along to collect it. Reaper events are the heartbeat of Nagios. Their frequency of occurrence in the event queue is a user-defined option and it’s an important one. No matter how fast the plugin finishes its work and reports back its status, Nagios will not process it until a service reaper comes along and discovers it in the message queue. 28 Chapter 2 Theory of Operations The number of service events Nagios is allowed to execute in parallel is defined by the max concurrent checks option.

But, soon, bad things start to happen. One day, the router between our admin’s workstation and servers 1 through 40 go down. Suddenly, the network segment is no longer visible to the system running the scripts. This causes 40 emails to be needlessly sent to our admin, one for each server that is no longer The Host and Service Paradigm 15 pinging. Later, another administrator and a few managers want to get different subsets of these notifications, so our sysadmin creates a group of mailing lists.

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