CKS — Introduction
Chapter Overview
The Certified Kubernetes Security Specialist (CKS) is the most advanced certification in the CNCF Kubernetes program. It requires a valid CKA and tests your ability to secure Kubernetes clusters, detect runtime threats, harden workloads, and enforce policies — all under time pressure on live clusters.
This is not an introduction to Kubernetes. If you’re here, you already know how to administer clusters. Now you’ll learn how to lock them down.
The CKS exam covers six security domains spanning cluster hardening, supply chain security, runtime threat detection, and more. Every topic in this chapter prepares you to approach the exam — and production security — with confidence.
What You’ll Learn
| # | Topic | Description |
|---|---|---|
| 1 | What is CKS? | Exam format, target audience, career benefits, certification hierarchy |
| 2 | Exam Overview | Domains, weights, snapshot table, tutorial-to-domain mapping |
| 3 | CKS vs CKA vs CKAD | Certification comparison and why CKS builds on CKA |
| 4 | Exam Environment | Interface, pre-installed tools, allowed resources, rules |
| 5 | Security Tools Overview | kube-bench, Trivy, Falco, AppArmor, Seccomp, OPA/Gatekeeper |
| 6 | Prerequisites & Study Plan | Self-assessment, practice environments, study schedules |
| 7 | Exam Tips & Strategies | Time management, YAML tips, common traps, key bookmarks |
| 8 | Practice Questions | 10 exam-fundamental questions covering all 6 domains |
CKS Exam Relevance
This chapter provides the strategic foundation for your CKS preparation. Understanding the exam domains, security tools, and scoring distribution lets you allocate study time where it matters most.
Key insight: Three domains — Minimize Microservice Vulnerabilities (20%), Supply Chain Security (20%), and Monitoring, Logging & Runtime Security (20%) — together account for 60% of the exam. Master these three, and you’ve covered more than half the score.
What CKS Expects You Already Know
Since CKS requires CKA, the exam assumes mastery of:
- Cluster setup with kubeadm (control plane, worker nodes, certificates)
- RBAC fundamentals (Roles, ClusterRoles, RoleBindings)
- etcd backup and restore
- Pod lifecycle, Deployments, DaemonSets, StatefulSets
- Services, Ingress, DNS, CNI basics
- PersistentVolumes and StorageClasses
- kubectl fluency and troubleshooting
CKS does not re-test these topics. It builds security on top of them. If any of these areas feel weak, revisit the CKA Tutorial first.
Start Learning: What is CKS? →
| ← CKS Overview | What is CKS? → |
