Explore a comprehensive conference talk on managing Role-Based Access Control (RBAC) across multiple Kubernetes clusters. Dive into the challenges of administering users and permissions in heterogeneous Kubernetes environments. Learn about an open-source authentication/authorization framework that leverages Kubernetes Custom Resource Definitions (CRDs) to simplify cross-cluster auth and RBAC. Discover how to implement a single authentication and authorization point for multiple clusters, manage user RBAC permissions across clusters with automatic permission grants, and effectively group cluster resources into manageable subsets for easier application of RBAC, PodSecurity, and NetworkPolicy. Gain insights into various use cases for multiple Kubernetes clusters, authentication flows, global roles, project concepts, and network access controls. Follow along with a live demo showcasing Rancher's implementation, including cluster import, authentication providers, and role management.