Nagios

Nagios

Screenshot of the Nagios Core web interface
Original author(s) Ethan Galstad and others
Initial release March 14, 1999[1]
Stable release 4.1.1 / August 19, 2015 (2015-08-19)[2]
Written in C
Operating system Cross-platform
Type Network monitoring
License GPLv2
Website www.nagios.org
Operating principle of Nagios

Nagios /ˈnɑːɡs/ is a free and open source computer-software application that monitors systems, networks and infrastructure. Nagios offers monitoring and alerting services for servers, switches, applications and services. It alerts users when things go wrong and alerts them a second time when the problem has been resolved.

Ethan Galstad and a group of developers originally wrote Nagios as NetSaint. As of 2015 they actively maintain both the official and unofficial plugins. Nagios is a recursive acronym: "Nagios Ain't Gonna Insist On Sainthood"[3] - "sainthood" makes reference to the original name NetSaint, which changed in response to a legal challenge by owners of a similar trademark.[4] "Agios" (or "hagios") also transliterates the Greek word άγιος, which means "saint".

Nagios was originally designed to run under Linux, but it also runs well on other Unix variants. It is free software licensed under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

In 2006 a survey[5] asked members of the nmap-hackers mailing-list to identify their favorite network-security tools. In the survey 3243 people voted; Nagios came in 67th overall and 5th among traffic-monitoring tools. (Nmap itself was excluded from the list.) Another survey, in 2011, placed Nagios at 69th place.[6]

Overview

Status reporting in Nagios

Nagios is open source software licensed under the GNU GPL V2. It provides:

Nagios Agents

NRPE

Nagios Remote Plugin Executor (NRPE) is a Nagios agent that allows remote system monitoring using scripts that are hosted on the remote systems. 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 allows you to monitor remote machine metrics (disk usage, CPU load, etc.). NRPE can also communicate with some of the Windows agent addons, so you can execute scripts and check metrics on remote Windows machines as well.

NRDP

Nagios Remote Data Processor (NRDP) is a Nagios agent with a flexible data transport mechanism and processor. It is designed with an architecture that allows it to be easily extended and customized. NRDP uses standard ports and protocols (HTTP and XML) and can be implemented as a replacement for NSCA.

NSClient++

This program is mainly used to monitor Windows 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 which is designed to inform your network problems

Controversial takeover of nagios-plugins site

On 16 January 2014, Nagios Enterprises redirected the nagios-plugins.org domain to a web server controlled by Nagios Enterprises without notifying the Nagios Plugins community team. In response, the original community plugin team has renamed the project to Monitoring Plugins and created a new project website at monitoring-plugins.org. [7][8]

See also

Wikimedia Commons has media related to Nagios.

Further reading

References

  1. "NetSaint Change Log". 2002-03-01. Archived from the original on 2006-05-01.
  2. "Nagios Core 4.x Version History". 2014-06-03. Retrieved 2014-06-15.
  3. 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".
  4. "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.
  5. Top 100 Security Tools
  6. "SecTools.Org: Top 125 Network Security Tools". Retrieved 2014-06-02.
  7. Holger Weiß (2014-01-16). "HEADS UP New project name: Monitoring Plugins". Retrieved 2014-06-02.
  8. "Bug 1054340: Update upstream URL to https://www.monitoring-plugins.org". Red Hat. 2014-01-16. Retrieved 2014-06-02. External link in |title= (help)

External links

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