Now that we have a firm understanding of the and strategies around architecting scalable and available systems, in this section, we will introduce tools, products, and open source projects to help implement these strategies. These tools will help you design more mature systems along the Automation and Application Centric Design axes of the CNMM.
The Simian Army is a suite of tools made available by Netflix on GitHub as an open source project. The army consists of monkeys (different tools) ranging from Chaos Monkey and Janitor Monkey to Conformity Monkey. Each monkey specializes in a certain objective, such as bringing down a subsystem, removing underutilized resources, or resources that do not conform to predefined rules (such as tagging). Using the Simian Army tool is a great way to test your systems in a gameday-like situation, where your engineers and admins are on the alert and are ready to remedy the system if it fails to deal with the outcome of the Simian...