Nagios

<h2 id="history">History</h2>
<p>On 16 January 2014, Nagios Enterprises redirected the nagios-plugins.org domain to a web server controlled by Nagios Enterprises without explicitly notifying the Nagios Plugins community team the consequences of their actions.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a><a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> Nagios Enterprises replaced the nagios-plugins team with a group of new, different members.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> The community team members who were replaced continued their work under the name Monitoring Plugins along with a different website with the new domain of <a href="https://www.monitoring-plugins.org/">monitoring-plugins.org</a>.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a>
</p>
<h2 id="design">Design</h2>
<p>Nagios agents include:
</p>
NRPE
Nagios Remote Plugin Executor (NRPE) is a Nagios agent that allows remote system monitoring using scripts that are hosted on the remote systems.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> It allows for monitoring of resources such as disk usage, system load or the number of users currently logged in. Nagios periodically polls the agent on remote system using the check_nrpe plugin. NRPE allows you to remotely execute Nagios plugins on other Linux/Unix machines. This would allow you to monitor remote <a href="/facts/Machine_(disambiguation)/VcGlnVoP">machine</a> metrics (disk usage, CPU load, etc.). NRPE can also communicate with some Windows agent add-ons, so you can execute scripts and check metrics on remote Windows machines, as well. As of 28 Jan 2020, NRPE 4.0.1 has been deprecated.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a>
NRDP
Nagios Remote Data Processor (NRDP) is a Nagios agent with a flexible data transport mechanism and processor.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> It is designed with an architecture that allows it to be easily extended and customized. NRDP uses standard ports and protocols (<a href="/facts/HTTP/TWtvf7JD">HTTP</a> and <a href="/facts/XML/clNgUfWk">XML</a>) and can be implemented as a replacement for Nagios Service Check Acceptor (NSCA).
NSClient++
This program is mainly used to monitor <a href="/facts/Windows/bwhAhuSL">Windows</a> machines. Being installed on a remote system, NSClient++ listens to port TCP 12489. The Nagios plugin that is used to collect information from this addon is called check_nt. As NRPE, NSClient++ allows to monitor the so-called 'private services' (memory usage, CPU load, disk usage, running processes, etc.) Nagios is a host and service monitor that is designed to inform you of network problems.
NCPA
The Nagios Cross Platform Agent is an <a href="/facts/Open-source_software/HzTaB8E9">open source</a> project maintained by Nagios Enterprises.<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a> NCPA installs on Windows, Linux, and Mac OS X. Created as a scale-able API that allows flexibility and simplicity in monitoring hosts. NCPA allows multiple checks such as memory usage, CPU usage, disk usage, processes, services, and network usage. Active checks are queried through the <a href="/facts/Application_programming_interface/GMlN4vUr">API</a> of the "NCPA Listener" service while passive checks are sent via the "NCPA Passive" service.
<h2 id="nagios-xi">Nagios XI</h2>
<p>Nagios XI is a proprietary interface using Nagios Core as the back-end, written and maintained by the original author, Ethan Galstad, and Nagios Enterprises. <a href="/facts/CentOS/FGGc2cIx">CentOS</a> and <a href="/facts/RHEL/6Cekx2ed">RHEL</a> are the currently supported operating systems. It combines Nagios Core with other technologies. Its main database and the ndoutils module that is used alongside Nagios Core use <a href="/facts/MySQL/QEEDNBDP">MySQL</a>. While the front-end of Nagios Core is mainly <a href="/facts/Common_Gateway_Interface/zWsLFXGJ">CGI</a> with some PHP,<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a> most of the Nagios XI front-end and back-end are written in PHP including the subsystem, event handlers, and notifications, and <a href="/facts/Python_(programming_language)/YbuGqofa">Python</a> is used to create <a href="/facts/Capacity_planning/VqbuA3C3">capacity planning</a> reports and other reports. <a href="/facts/RRDtool/0W7ndb1k">RRDtool</a> and <a href="/facts/Highcharts/fsLxrcze">Highcharts</a> are included to create customizable graphs that can be displayed in <a href="/facts/Dashboard_(management_information_systems)/Vza1HUUn">dashboards</a>.
</p>
<h2 id="see-also">See also</h2>
<ul>
<li>Free and open-source software portal</li></ul>
<ul><li><a href="/facts/Check_MK/rxDnudE6">Check MK</a> – IT infrastructure monitoring softwarePages displaying short descriptions of redirect targets</li>
<li><a href="/facts/Comparison_of_network_monitoring_systems/StKb0Stt">Comparison of network monitoring systems</a></li>
<li><a href="/facts/Icinga/YggCzR6s">Icinga</a> – Monitoring software</li>
<li><a href="/facts/Naemon/XrjppC5B">Naemon</a> – Open-Source Computer System Monitoring Software</li>
<li><a href="/facts/Nconf/vCd0soEH">Nconf</a> – Network monitoring configuration software</li>
<li><a href="/facts/Shinken_(software)/lNnBN15G">Shinken (software)</a> – Network monitoring software</li>
<li><a href="/facts/NetXMS/yuB6r5GE">NetXMS</a></li></ul>

<h2 id="further-reading">Further reading</h2>

<ul><li>Barth, Wolfgang; (2006) <i>Nagios: System And Network Monitoring</i> - No Starch Press <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 1-59327-070-4</li>
<li>Barth, Wolfgang; (2008) <i>Nagios: System And Network Monitoring, 2nd edition</i> - No Starch Press <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 1-59327-179-4</li>
<li>Turnbull, James; (2006) <i>Pro Nagios 2.0</i> - San Francisco: Apress <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 1-59059-609-9</li>
<li>Josephsen, David; (2007) <i>Building a Monitoring Infrastructure with Nagios</i> - Prentice Hall <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 0-13-223693-1</li>
<li>Dondich, Taylor; (2006) <i>Network Monitoring with Nagios</i> - O'Reilly <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 0-596-52819-1</li></ul>
<ul><li>Schubert, Max et al.; (2008) <i><a href="http://www.nagios3book.com/">Nagios 3 Enterprise Network Monitoring</a></i> - Syngress <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-1-59749-267-6</li>
<li>Kocjan, Wojciech; (2008) "<a href="https://web.archive.org/web/20090813073735/http://www.packtpub.com/guide-for-learning-nagios-3">Learning Nagios 3.0</a>" - Packt Publishing <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 1-84719-518-0</li></ul>

<h2 id="external-links">External links</h2>

Wikimedia Commons has media related to Nagios.

<ul><li><a href="https://www.nagios.com/">Official website</a></li>
<li><a href="https://github.com/NagiosEnterprises/nagioscore">Nagios</a> on <a href="/facts/GitHub/n1hNCsc3">GitHub</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"Open Source Monitoring: Icinga vs Nagios Sos open source". Sosopensource.com. 2010-11-25. Retrieved 2020-05-26. Nagios – whose name is a recursive acronym ("Nagios Ain't Gonna Insist On Sainthood") ironically refers to the original name NetSaint changed to avoid trademark troubles – is among the most popular open source network management tools and application. <a href="http://sosopensource.com/325.html" target="_blank">http://sosopensource.com/325.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Galstad, Ethan (2009-08-24). "FAQ Database: Miscellaneous: What does Nagios mean?". Nagios: Frequently Asked Questions. Nagios Enterprises, LLC. Retrieved 2014-06-02. The official meaning is that N.A.G.I.O.S. is a recursive acronym which stands for "Nagios Ain't Gonna Insist On Sainthood". <a href="http://support.nagios.com/knowledgebase/faqs/index.php?id=52&catid=35&faq_id=2" target="_blank">http://support.nagios.com/knowledgebase/faqs/index.php?id=52&catid=35&faq_id=2</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>"2005-02-22 - Ethan Galstad". FOSDEM 2005. 2005-02-22. Retrieved 2014-06-02. Although we were able to eventually reach an amicable agreement on my future use of the name "NetSaint", I felt it was prudent to change the name in order to prevent any future mishaps. <a href="https://archive.fosdem.org/2005/index/interviews/interviews_galstad.html" target="_blank">https://archive.fosdem.org/2005/index/interviews/interviews_galstad.html</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>"Bug 1054340: Update upstream URL to https://www.monitoring-plugins.org". Red Hat. 2014-01-16. Retrieved 2014-06-02. <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1054340" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=1054340</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
<li id="fn:5"><p>"Nagios-Plugins Web Site Taken Over By Nagios". Slashdot. 19 January 2014. <a href="https://tech.slashdot.org/story/14/01/19/0454222/nagios-plugins-web-site-taken-over-by-nagios" target="_blank">https://tech.slashdot.org/story/14/01/19/0454222/nagios-plugins-web-site-taken-over-by-nagios</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li>
<li id="fn:6"><p>"Uncomfortable Info On The Plugin Team Changes". nagios-plugins.org. 24 January 2014. Retrieved 29 June 2016. <a href="https://nagios-plugins.org/uncomfortable-info-on-the-plugin-team-changes/" target="_blank">https://nagios-plugins.org/uncomfortable-info-on-the-plugin-team-changes/</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li>
<li id="fn:7"><p>Holger Weiß (2014-01-16). "HEADS UP New project name: Monitoring Plugins". Retrieved 2014-06-02. <a href="https://www.monitoring-plugins.org/archive/help/2014-January/006503.html" target="_blank">https://www.monitoring-plugins.org/archive/help/2014-January/006503.html</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li>
<li id="fn:8"><p>"NagiosEnterprises/nrpe". github.com. 9 September 2022. <a href="https://github.com/NagiosEnterprises/nrpe" target="_blank">https://github.com/NagiosEnterprises/nrpe</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li>
<li id="fn:9"><p>"Add deprecation notice". GitHub. Retrieved 2021-07-16. <a href="https://github.com/NagiosEnterprises/nrpe/commit/e5cdd3b641b36ca4f56b1c5ca7286dafb85ab56f" target="_blank">https://github.com/NagiosEnterprises/nrpe/commit/e5cdd3b641b36ca4f56b1c5ca7286dafb85ab56f</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li>
<li id="fn:10"><p>"NagiosEnterprises/nrdp". github.com. 2 December 2021. <a href="https://github.com/NagiosEnterprises/nrdp" target="_blank">https://github.com/NagiosEnterprises/nrdp</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li>
<li id="fn:11"><p>"NCPA". GitHub. 12 August 2022. <a href="https://github.com/NagiosEnterprises/ncpa" target="_blank">https://github.com/NagiosEnterprises/ncpa</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li>
<li id="fn:12"><p>"ageric/nagios". github.com. 4 January 2022. <a href="https://github.com/ageric/nagios/blob/master/html/main.php" target="_blank">https://github.com/ageric/nagios/blob/master/html/main.php</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li>
</ol>

Nagios open-in-new

Nagios