Process monitoring tool. Inspired from Bluepill and God. Requires Ruby(MRI) >= 1.9.3-p194. Uses Celluloid and Celluloid::IO.

Bluepill keeps your daemons up while taking up as little resources as possible. After all you probably want the resources of your server to be used by whatever daemons you are running rather than the thing that's supposed to make sure they are brought back up, should they die or misbehave.

An easy to configure, easy to extend monitoring framework written in Ruby.

Simple service monitoring with a clean DSL for configuration.

A monitoring framework that aims to be simple, malleable, and scalable.

With Amnesia you'll know exactly whats happening with memory when it comes to memcached.

Black-box web app configuration testing

Monitor server CPU/Memory/Disk Usage/URL Loading, so that you can view those statistics on a web page, as well as providing an interface to client prorams to read those statistics.

Monitor all aspects of your applications health.

Provides endpoint for NewRelic HTTP ping monitoring for Rails applications

An easy to use DSL for building custom probes for the Nagios monitoring system

Amon client for Ruby that provides logging and exception handling for web applications

Health rails gives you some default checks and a DSL for defining your own checks.

Visage is a web interface for viewing collectd statistics. It also provides a JSON interface onto collectd's RRD data, giving you an easy way to mash up the data.

Simple health-checker as rack middleware