Nagios

From Wikipedia, the free encyclopedia

Nagios is a popular open source computer system and network monitoring application software. It watches hosts and services that you specify, alerting you when things go bad and again when they get better.

Nagios (pronounced "NAH-gee-ohs" with a hard 'G' like geese), originally created under the Netsaint name, was written and is currently maintained by Ethan Galstad, along with an army of developers actively maintaining both official and unofficial plugins.

Nagios was originally designed to run under Linux, but also runs fine on Unix variants as well.

Nagios is licensed under the GNU General Public License Version 2 as published by the Free Software Foundation.

1 Overview
2 NAGIOS Meaning
3 External links
4 Books

[edit] Overview

Nagios status screen

Monitoring of network services (SMTP, POP3, HTTP, NNTP, ICMP, SNMP)
Monitoring of host resources (processor load, disk usage, system logs) on a majority of network operating systems, even Microsoft Windows with the NRPE_NT plugins.
Remote monitoring supported through SSH or SSL encrypted tunnels.
Simple plugin design that allows users to easily develop their own service checks depending on needs, by using the tools of choice (Bash, C++, Perl, Python, PHP, C#, etc.)
Parallelized service checks
Ability to define network host hierarchy using "parent" hosts, allowing detection of and distinction between hosts that are down and those that are unreachable
Contact notifications when service or host problems occur and get resolved (via email, pager, SMS, or any user-defined method through plugin system)
Ability to define event handlers to be run during service or host events for proactive problem resolution
Automatic log file rotation
Support for implementing redundant monitoring hosts
Optional web interface for viewing current network status, notifications, problem history, log files, etc.

[edit] NAGIOS Meaning

According to Ethan Galstad's official FAQ on the Nagios site N.A.G.I.O.S. is a recursive acronym: "Nagios Ain't Gonna Insist On Sainthood". It's a reference to the original incarnation of the software under the name Netsaint.

[edit] External links

Official website
Official Plugins — must be downloaded separately from the main Nagios program.
Official Documentation
Official FAQ — Vital addenda to the documentation
Nagios Forum — One of the best supported Nagios forums available
NagiosExchange — extensive third-party Nagios-related software repository
NagiosSMSGateway — Configuration Example for SMS-Gateway
Nagios SMS through Mollie — Addon for sending SMS through the Mollie SMS-gateway
Nagios support — Installation, Configuration and Commercial Support
Oreon Project — A Visualisation and Configuration Frontend for Nagios
Altinity's Blog — Lots of Nagios related articles, code and tips
Nagios Checker — Firefox extension for easy monitoring the events from the target Nagios system
Install Guide — FreeBSD/Apache/MySQL/Nagios/Fruity McDebian Site (Spanish)