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Server Monitoring With munin And monit
February 28, 2010 by christian · Leave a Comment
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. 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).
Website: http://munin.projects.linpro.no/
Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.
Monit can start a process if it does not run, restart a process if it does not respond and stop a process if it uses too much resources. You can use Monit to monitor files, directories and filesystems for changes, such as timestamp changes, checksum changes or size changes. You can also monitor remote hosts; Monit can ping a remote host and can check TCP/IP port connections and server protocols. Monit is controlled via an easy to use control file based on a free-format, token-oriented syntax. Monit logs to syslog or to its own log file and notifies you about error conditions and recovery status via customizable alert.
Website: http://mmonit.com/monit/
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The goal of this website is to give an end to end open source solution for a typical small company including Telephony, Document management, Customer Relation Application, Networking, Remote access, Desktop solutions and so on.
Although only the tools/applications have been listed on the website for the moment, a complete network diagram and individual how-to articles will follow.
Please note that for most of the installation instructions, we will not re-invent the wheel. A large number of very competent experts have already written how-to articles, we will just refer you to those. We will only document the missing links between the different components or if we feel that some installations could be better documented.
The KinDev team.
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Please note that the text for each of the blog post is taken from their respective websites. The KinDev team have experimented with those tools at different occasions. Your need and requirements could be different than the ones identified by our team for a specific situation, please take the time to read and understand the tool/application features before starting to install in a production environment.
We hope that you will have as much fun as we have discovering, installing and using those tools/applications and please do not forget to donate to the respective open source volunteers that have changed the IT landscape for ever.
The KinDev team.