Definition
Kubernetes security refers to the comprehensive set of practices, tools, and configurations designed to protect containerized applications and the underlying infrastructure managed by Kubernetes. It encompasses securing the control plane, worker nodes, container images, network traffic, and data stored within the cluster. This is achieved through various mechanisms like role-based access control, network policies, secrets management, and runtime security monitoring. Implementing robust Kubernetes security is crucial for preventing unauthorized access, data breaches, and service disruptions, thereby ensuring the integrity and availability of applications. For instance, using network policies to restrict pod-to-pod communication is a common real-world application of Kubernetes security. Unlike general cloud security, Kubernetes security focuses specifically on the unique challenges and attack vectors present in container orchestration environments. This topic is frequently covered in cybersecurity certifications such as Security+, CySA+, and CISSP, as well as cloud architecture exams like AWS Certified Solutions Architect.