Munin is a networked resource monitoring tool that can help analyze resource trends and "what just happened to kill our performance?" problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work.
In Norse mythology Hugin and Munin are the ravens of the god king Odin. They flew all over Midgard for him, seeing and remembering, and later telling him. "Munin" means "memory".
Munin the monitoring tool surveys all your computers and remembers what it saw. It presents all the information in graphs through a web interface. Its emphasis is on plug and play capabilities. After completing a installation a high number of monitoring plugins will be playing with no more effort.
Using Munin you can easily monitor the performance of your computers, networks, SANs, applications, weather measurements and whatever comes to mind. It makes it easy to determine "what's different today" when a performance problem crops up. It makes it easy to see how you're doing capacity-wise on any resources.
Munin uses the excellent RRDTool (written by Tobi Oetiker) and the framework is written in Perl, while plugins may be written in any language. Munin has a master/node architecture in which the master connects to all the nodes at regular intervals and asks them for data. It then stores the data in RRD files, and (if needed) updates the graphs. One of the main goals has been ease of creating new plugins (graphs).
This site is a wiki as well as a project management tool. We appreciate any contributions to the documentation. While this is the homepage of the Munin project, we will still make all releases through Sourceforge.
The stable branch is the 2.0.x line, development is happening in 2.1.x.
Munin 2.0 is available in repositories for (at least) the following Linux distributions: Debian, Ubuntu, Fedora, Red Hat, Red Hat Enterprise Linux, Mandriva, Gentoo and is also available in FreeBSD ports.
Munin is written in Perl and plugins are easy to write. "Porting" to or from any Unix platform is quite easy if you have some Perl/shell/sysadmin experience. Currently we have plugins for Linux, FreeBSD, NetBSD, Solaris, AIX - and of course cross-platform plugins.
In addition you can use alternate Munin-node implementations on embedded systems such as :
- OpenWRT (written in minimal perl)
- Muninlite (written in shell script)
- Poor Man's Munin Node written in Perl.
Munin can always need more help. Please see the list of tasks if you're looking for something to do.
- An urgent task to do is moving content from this wiki to the Munin DocBook?
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