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System monitoring: Icinga, Nagios, and Opsview

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Three open-source system monitoring software packages, two of which are derived from Nagios...
If in your work you are responsible for just one server, you will surely wonder: What is the best way to get the situation under control?

In the world there are good open source software that allow you to monitor the status of servers, services and programs.

In this article we’ll see an overview some of the softwares in this category, and in particular some related to Nagios...
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mail this link | permapage | score:9203 | -Ray, March 24, 2011

How to install Icinga (Nagios Fork) in Ubuntu 12.10 server

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Icinga is an enterprise grade open source monitoring system which keeps watch over networks and any conceivable network resource, notifies the user of errors and recoveries and generates performance data for reporting. Scalable and extensible, Icinga can monitor complex, large environments across dispersed locations.

Icinga is a fork of Nagios and is backward compatible. So, Nagios configurations, plugins and addons can all be used with Icinga. Though Icinga retains all the existing features of its predecessor, it builds on them to add many long awaited patches and features requested by the user community. read more...
mail this link | permapage | score:9103 | -gg234, March 26, 2013

Tutorial: Write plugins for Nagios

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Nagios is open source monitoring software that scans hosts, services, and networks for problems. Learn more about Nagios and find out what new system monitoring possibilities exist with this software.
You can use Nagios to monitor all sorts of hardware and software. The opportunity to write your own plug-ins makes it possible to monitor everything that your Nagios server can communicate with. As you can use any computing language that manages command-line arguments and exit status, the possibilities are almost endless!
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mail this link | permapage | score:8580 | -BlueVoodoo, July 19, 2007

NagiosGrapher on CentOS

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The important aspect of graphing is that it enables a busy administrator to evaluate a server visually, often making more sense than strings of data. NagiosGrapher is a tool that you can use with Nagios to graph information that you want to evaluate as an administrator. This tutorial will show you how to install Nagiosgrapher in preparation for the data to be graphed. read more...
permapage | score:8490 | -aweber, April 7, 2010

Tutorial: Install Nagios 3.4.4 on CentOS 6.3

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Nagios is a monitoring tool under GPL licence. This tool lets you monitor servers, network hardware (switches, routers, ...) and applications. A lot of plugins are available and its big community makes Nagios the biggest open source monitoring tool. This tutorial shows how to install Nagios 3.4.4 on CentOS 6.3. read more...
permapage | score:8485 | -falko, January 31, 2013

Introduction: Nagios Network Monitoring

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The installation in this article is based on Debian's apt-get, but the article should otherwise apply to most any Linux.
Nagios is a powerful, modular network monitoring system that can be used to monitor many network services like smtp, http and dns on remote hosts. It also has support for snmp to allow you to check things like processor loads on routers and servers. I couldn't begin to cover all of the things that nagios can do in this article, so I'll just cover the basics to get you up and running.
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mail this link | permapage | score:8258 | -Ray, December 15, 2005

NagiosQL web configurator

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Configure Nagios over your network or the Internet from your browser...
NagiosQL is a web based administration tool for Nagios 2.x, 3.x and Icinga 1.x. It helps you to easily build a complex configuration with all options, manage and use them. NagiosQL is based on a webserver with PHP, MySQL and local file or remote access to the Nagios configuration files via ssh or ftp.
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permapage | score:8252 | -Ray, April 20, 2011

Tutorial: Nagios Installation on Ubuntu 10.04

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This tutorial shows how to set up an Ubuntu Lucid Lynx (10.04) server with the Nagios Monitoring System. Nagios is a powerful, highly configurable monitoring and alarming system, which can monitor a wide variety of systems (network, server, daemons, applications). Monitoring could be done for instance for availability or utilization. We will be installing Nagios, Nagios Plugins, and Postfix with this tutorial. Postfix will be configured to send email via your alternate email server. read more...
permapage | score:8231 | -falko, February 21, 2011

Monitor a Cisco Router with Nagios

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Sometimes you will need to create service checks using the MIBs that you can discover with snmpwalk. This tutorial will show you the process of creating service checks for a Cisco router manually.
In order to start work on monitoring a device you need to manually scan the MIBs for information that you can mine out for monitoring. This process can be intimidating but you must keep digging in order to discover information that you can use. The MIB list created for this router listed 2692 MIBs. Obviously you will not use all of these but you want to scan the list to begin the process of discovery.
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mail this link | permapage | score:8224 | -aweber, February 17, 2011

Tutorial: Nagios Hostgroups

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How to configure hostgroups with Nagios...
One cool ability of Nagios is that it allows you to group machines into services. Say, for instance, you have a number of machines that serve as Web servers or Samba servers. Instead of having to scroll around to find them, you can group those machines together, by service, to make for much easier monitoring. In this tutorial I am going to show you how to take advantage of this nifty feature.
read more...
permapage | score:8137 | -Ray, April 5, 2010

Monitor OSX and Linux with Nagios and SNMP

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OSX is somewhat unique both in the fact that this is not a common server which is monitored and also your actually working with two operating systems, FreeBSD under the hood and OSX built on top. However, these examples could also be used for Linux distros with a few modifications. SNMP is selected for creating the checks because it is the easiest to deploy with minimal time on the servers to be monitored. read more...
permapage | score:8052 | -aweber, April 23, 2012

Splunk and Nagios

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Find out why Splunk is adding Nagios, a popular open source monitoring tool, to its data center troubleshooter in this interview with chief Splunker Michael Baum. Baum also describes Splunk's mission and why data center troubleshooting is harder than finding a needle in a haystack. read more...
permapage | score:7818 | -janewalker6847, February 15, 2006

Nagios 2012 World Conference

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The Nagios 2012 World conference starts today and one of the major events of the conference will be the demonstrations of the Nagios 2012 interface by Ethan Galstad. I have been running the beta for several weeks in the Nagios Training classes and the response has been very favorable about the new features. Here is a list of a few to look for. read more...
permapage | score:7803 | -aweber, September 27, 2012

Nagios Face-lift with V-Shell

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Nagios is the foundation for many networking applications world wide and is know for its flexibility. Building upon those concepts is a new project named the Nagios Visual Shell (V-Shell). What follows is a short review of V-Shell and an interview with the lead developer of this new Nagios project. read more...
permapage | score:7763 | -aweber, December 11, 2010

Review: Nagios free network monitoring software

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There are also some graphical goodies available for Nagios to make your monitoring display pretty...
Nagios is "an open source host, service and network monitoring program," according to the Nagios Web site. That's as good a description as any.

Nagios is a fairly popular monitoring system and is scalable up to hundreds of hosts.

[ . . . ]

Nagios's Web-based interface allows you to monitor hosts and services when you happen to be in front of a computer — but what happens when everyone's out of the office? Nagios will email and page admins to alert them to problems. While this isn't terribly fun when you're on the receiving end of the pages, it's a necessary evil.
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mail this link | permapage | score:7667 | -Ray, April 1, 2005

Nagios: Network Monitoring

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Nagios is both a powerful and flexible network monitoring tool for checking devices and applications. The power of Nagios is in the ability to monitor many different network devices at one time using various methods to monitor those devices. The flexibility of Nagios provides an administrator the tools to monitor just about anything that is connected to a network. In addition, Nagios allows the administrator to monitor both the external ports and internal application processes on those devices. Monitoring would not be complete without multiple methods for contacting administrators which Nagios also provides. read more...
mail this link | permapage | score:7619 | -aweber, November 23, 2010

Nagios: Installation and Configuration Walkthrough

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This article provides the steps necessary for Nagios installation on a webserver or a cluster. The steps are presented in the form of the commands, in order, interpersed with commentary. Follow along the walk-through and enjoy...
#su
#adduser nagios
#passwd nagios
Changing password for user nagios.
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
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permapage | score:7407 | -Ray, February 21, 2006

Passive and active checks in Nagios

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The author of "Network monitoring with Nagios" suggests a workaround for balancing active and passive checks and explains the impact of service failures.
Increasing the number of passive checks you use instead of active checks will increase the number of devices you can monitor with Nagios. Beyond that, you may need to start looking into using a distributed Nagios implementation. This requires separate Nagios instances communicating with a central Nagios system. It's tough to maintain the configuration files, since each Nagios instance requires its own set, but in the end, it'll do the job.
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mail this link | permapage | score:7368 | -janewalker6847, December 8, 2006

Nagios: Scheduled downtime

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When a server or device is being worked on and you need to schedule downtime so Nagios does not notify administrators that can be performed at the web interface.
There are two types of downtime. Fixed downtime allows for and exact start and end time when the host or service will be unavailable. Flexible downtime allows for a start time but an open ended startup time as the exact time cannot be determined based on the nature of the situation.
read more...
permapage | score:7358 | -aweber, January 21, 2011

Install Nagios, monitor Debian

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Nagios is a monitoring solution for complex IT infrastructures, Nagios is easy to implement and can be extended by custom-modules, called plugins. In this howto I explain how to install Nagios on a Debian Lenny host and make the configuration for it. Furthermore we are going to install a second Debian machine which we monitor with remote and local plugins. read more...
permapage | score:7330 | -falko, March 7, 2011
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