Learn about the critical design principles of Kubernetes controllers in this 57-minute conference talk from Red Hat engineers Feny Mehta and Francesco Ilario. Dive deep into the "single resource" controller design pattern - a best practice where controllers manage only one resource rather than multiple resources or vice versa. Explore practical implementations through examples, compare well-designed controllers with discouraged alternatives, and understand how these design choices impact operator efficiency. Master the fundamentals of implementing single-resource controllers while gaining valuable insights into their advantages, limitations, and real-world applications in Kubernetes environments.