Definition
Kubernetes API Security refers to the set of practices and controls implemented to protect the Kubernetes API server, the central management component of a Kubernetes cluster. It ensures that only authorized users and services can interact with the cluster's resources, preventing unauthorized access or malicious manipulation. This is achieved through authentication, authorization, and admission control mechanisms that validate every request made to the API server. Implementing robust Kubernetes API security is crucial for maintaining the integrity, availability, and confidentiality of containerized applications and the underlying infrastructure. For instance, using Role Based Access Control (RBAC) to limit user permissions to specific namespaces and resources is a common practice. Unlike network security which focuses on traffic flow, API security specifically targets the commands and data exchanged with the Kubernetes control plane. This concept is relevant for cybersecurity certifications like CompTIA Security+ and CySA+.