Red Hat DevNation Tech Talk: The Kubernetes Operator pattern is rooted in Site Reliability Engineering (SRE) automation principles, and SRE’s key service metrics called “golden signals” provide the basic feedback stream for sophisticated, proactive controller logic in an Operator. Consider it a bug when your Operator’s application requires human intervention. Operators are where you write code to fix those bugs and automate operations chores. The Operator maturity model is a way of thinking about iterative development of this kind of advanced automation on Kubernetes.