Quince alPillan writes "Netflix revealed today that they've released Chaos Monkey, an open source Amazon Web Service testing tool that will randomly turn off instances in Auto Scaling Groups. 'We have found that the best defense against major unexpected failures is to fail often. By frequently causing failures, we force our services to be built in a way that is more resilient. We are excited to make a long-awaited announcement today that will help others who embrace this approach. ...source code for the founding member of the Simian Army, Chaos Monkey, is available to the community.'"