Kubernetes Security - ClusterRoles and ClusterRoleBindings: Practical RBAC Guide with Examples
Hello DevOps, DevSecOps Engineers, SREs, and Kubernetes Administrators! As Kubernetes environments grow, managing access becomes an important part of cluster administration. Not every engineer needs full cluster-admin access. In many situations, we need to provide users with access to specific cluster-wide resources such as Nodes, PersistentVolumes, StorageClasses, or other non-namespaced resources . This is where Kubernetes RBAC (Role-Based Access Control) becomes extremely useful. In this article, we will explore ClusterRoles and ClusterRoleBindings with practical examples. We will create permissions for users, bind those permissions to users, validate access, and clean up the configuration. The examples are based on the practical Kubernetes administration scenarios I have worked with and used while practicing Kubernetes RBAC concepts. What We Will Learn In this article, we will cover: What is a ClusterRole? What is a ClusterRoleBinding? ClusterRole vs Role ClusterRoleBinding vs R...