Nerval's Lobster writes "Netflix has released 'Janitor Monkey,' an open-source tool for killing old Amazon Web Services (AWS) instances, that began life as an in-house product. While those hosting a private data center will have little use for this scrubbin' simian, those enterprises with a public cloud can add Janitor Monkey to their administrative bag of tricks. The premise behind the tool is a simple one: while AWS allows for easy (and cheap) experimentation, it's easy for even the most diligent IT pro to rack up unnecessary costs when they forget to shut off a particular instance. While Netflix's Asgard tool—open-sourced in June, because this is how the company rolls—allows administrators to delete unused resources, Janitor Monkey takes things one step further by allowing those instances to be automatically found so that Asgard can clean them up. Over the past year, Janitor Monkey has deleted more than 5,000 resources running in the Netflix production and test environments, the company said. Janitor Monkey detects AWS instances, EBS volumes, EBS volume snapshots, and auto-scaling group."