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Sensu: A Monitoring Framework Built for the Cloud

The company Sonian used tools like Nagios, Collectd, Graphite, and Ganglia for monitoring and metrics.  Today they use a tool that they created called Sensu.  This tool was able to keep up much better with the constantly growing number of Amazon instances that Sonian was deploying.  Here was there old monitoring architecture on Nagios and then on Sensu:
Problems with Nagios configuration

Our problems with Nagios

  • Configuration is unpleasant & restrictive
  • Cannot discover new servers on its own
  • Easily overwhelmed with a high number of clients & checks
  • Difficult to extend & hack

A Brief Introduction To Sensu.

Enter Sensu, a monitoring framework that aims to be simple, malleable, and scalable.

Sensu architecture diagram
-- Sonian Blog

Sensu integrates technologies such as Chef, Puppet, RabbitMQ, Redis, and others.  You can check out the Sonian blog for the full picture of this monitoring system and then go get the code on GitHub.

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