Explore the world of Kustomize extensions in this 37-minute conference talk from KubeCon + CloudNativeCon Europe 2022. Dive into the evolution and practical applications of client-side custom resources for Kustomize, a popular tool for managing Kubernetes configurations. Learn how to leverage these CR-style extensions to address common application needs and manage declarative configuration at scale. Gain insights into building effective extensions, understanding the benefits of client-side vs. server-side approaches, and utilizing Kustomize's kyaml tools. Discover best practices for keeping extensions declarative, implementing testing strategies, and integrating custom variants into CD pipelines. Whether you're a developer or platform builder, acquire practical knowledge to enhance your Kubernetes configuration management skills.