Collectd + Visage (http://github.com/auxesis/visage http://github.com/auxesis/visage) Monit + Monit Aggregator (http://github.com/mattfawcett/monit-aggregator h

Collectd + Visage (http://github.com/auxesis/visage http://github.com/auxesis/visage) Monit + Monit Aggregator (http://github.com/mattfawcett/monit-aggregator http://github.com/mattfawcett/monit-aggregator) I've hacked on both a bit, but they're great starts for small clusters.