Explore design patterns for creating extendable and scalable Kubernetes extensions in this 25-minute conference talk by Max Smythe from Google and Rita Zhang from Microsoft. Dive into the unique model of OPA Gatekeeper, a customizable Kubernetes admission webhook that enhances policy enforcement and governance. Learn about innovative design patterns such as CRDs-that-create-CRDs and leaderless horizontal scalability, which enable dynamic creation, management, and destruction of custom resources for webhook customization. Gain insights from Gatekeeper's maintainers on how these patterns contribute to building flexible and scalable Kubernetes extensions, using OPA Gatekeeper as a prime example.