Kubernetes Security: Securing Host and Cluster Infrastructure

Securing a Kubernetes cluster requires looking beyond the orchestration layer down to the underlying host operating system and infrastructure. If the host is compromised, the entire cluster is at risk. This text-based course guides you through the foundational concepts of Kubernetes security, focusing on reducing the attack surface of your nodes and securing cluster components. You will gain a clear understanding of how to harden systems and protect workloads against modern threats. What you'll learn: Understand foundational security concepts for Kubernetes nodes and host operating systems; Minimize the host attack surface by disabling unused services and securing ports; Configure secure container runtimes and explore the benefits of minimal, distroless base images; Implement zero-trust network policies to restrict cluster communication; Apply kernel hardening techniques using tools like AppArmor and seccomp; Identify and remediate common misconfigurations in cluster infrastructure. You will start with essential security definitions and host-level concepts before moving on to practical configurations, system hardening techniques, and workload security policies. This course is designed for system administrators, DevOps beginners, and security enthusiasts who want to understand Kubernetes security from the ground up. No prior security experience is required, though a basic familiarity with Kubernetes concepts is helpful. Start reading today to build a resilient and secure container environment.