PuppetConf 2016

You accidentally deployed the wrong thing. Or you deployed the right thing, but now it's cruft and you want it gone. Puppet is an elegant tool for placing and assembling infrastructure, but what happens when it's time to disassemble? This talk will cover Yelp's experience using Puppet for automatic deconfiguration management, and how we can confidently make statements about both what our infrastructure _is_, and what it _is not_, without requiring extra Puppet code. We will consider how to do this with many of the resource types we use from day to day, including the simplest ones (files), more complex (cronjobs), and the fiendish (monitoring checks, system packages).