By David Josephsen
Build real-world, end-to-end community tracking strategies with Nagios
This is the definitive advisor to development reasonably cheap, enterprise-strength tracking infrastructures with Nagios, the world’s major open resource tracking software. community tracking expert David Josephsen is going a ways past the fundamentals, demonstrating easy methods to use third-party instruments and plug-ins to unravel the categorical difficulties on your particular surroundings. Josephsen introduces Nagios “from the floor up,” exhibiting how one can plan for fulfillment and leverage today’s most respected tracking top practices. Then, utilizing sensible examples, genuine directives, and dealing code, Josephsen offers specified tracking ideas for home windows, Unix, Linux, community apparatus, and different structures and units. You’ll locate thorough discussions of complicated subject matters, together with using information visualization to unravel complicated tracking difficulties. this can be additionally the 1st Nagios e-book with entire assurance 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 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 visual display unit the units and systems you want to computer screen, 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 answerable for platforms tracking infrastructure in any association, huge or small, this booklet may also help you in attaining the implications 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 complicated, high-volume networks. Josephsen’s certifications contain CISSP, CCNA, CCDA, and MCSE. His co-authored paintings on Bayesian unsolicited mail filtering earned a most sensible Paper award at USENIX LISA 2004. He has been released in either ;login and Sysadmin magazines on themes when it comes to protection, platforms tracking, and unsolicited mail mitigation.
Introduction bankruptcy 1 top Practices bankruptcy 2 thought of Operations bankruptcy three fitting Nagios bankruptcy four Configuring Nagios bankruptcy five Bootstrapping the Configs bankruptcy 6 gazing bankruptcy 7 Visualization bankruptcy eight Nagios occasion dealer Interface APPENDIX A Configure ideas APPENDIX B nagios.cfg and cgi.cfg APPENDIX C Command-Line techniques Index
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Extra resources for Building a Monitoring Infrastructure with Nagios
Just write a local plugin around the sysadmin’s SSH command. 5. 5 A script that calls load_checker and parrots its output and exit code. sh"' #get the exit code CODE=$? 5 doesn’t have any conditional logic. Its only job is to execute the remote script, and parrot back its output and exit code to the local terminal. But because it does exit with the proper code and passes back a single line of text, it’s good enough for Nagios. It’s a plugin that calls another plugin via Secure Shell (SSH), but Nagios doesn’t know about this, or care, as long as an exit code and some text are returned.
Hosts and Services As mentioned earlier, Nagios makes few assumptions about what and how you want to monitor. It allows you to define everything. Definitions are the bread and butter of how Nagios works. Every element Nagios operates with is user-defined. For example, Nagios knows that in the event a plugin returns a critical state, it should send a notification, but Nagios doesn’t know what it means to send one. You define the literal command syntax Nagios uses to notify contacts, and you may do this on a contact-by-contact basis, a service-by-service basis, or both.
01). 3 and places it on the remote server. 3 A remote load average checker. org" fi In this script, the output of uptime is filtered through awk, which extracts the last number from uptime’s output. This number happens to be the 15-minute load average. This number is compared against 1, and if it is greater, our admin receives an email. sh" Well, in reality, he’d probably just schedule it in cron on the remote box, but bear with me for a second. An interesting thing about executing scripts remotely with SSH is that not only does SSH capture and pass back the output from the remote script, but also its exit code.
Building a Monitoring Infrastructure with Nagios by David Josephsen