What Is CKS?

Overview

CKS: Certified Kubernetes Security Specialist is a CNCF credential. Secure Kubernetes clusters and containerized applications with advanced security practices. This PathKey™ guide summarizes the domains, format, cost signals, eligibility, and renewal pattern so you can decide before you book. Accumentum is an Army CA and Air Force COOL Approved Vendor. We teach preparation for the CNCF exam. CNCF sets exam content, fees, and policies.

Accumentum is an Army CA and Air Force COOL Approved Vendor. We teach preparation for the CNCF exam. CNCF sets exam content, fees, and policies.

Who it is for

• Professionals with CKA certification or equivalent experience seeking to specialize in securing Kubernetes clusters and infrastructure.
• DevOps practitioners aiming to enhance their skills in implementing security best practices for cloud-native applications and Kubernetes environments.
• IT security specialists looking to deepen their expertise in protecting Kubernetes-based systems and ensuring compliance in enterprise settings.

Exam domains

Weights follow the official outline.

1. 01

   Kubernetes Security Fundamentals

   Understand the shared responsibility model for securing Kubernetes in on-premises and cloud environments, Explore the CKS exam domains, including cluster hardening, supply chain security, and runtime protection, and Identify common Kubernetes security threats, such as privilege escalation and misconfigured APIs.

2. 02

   Cluster Setup and Hardening

   Configure secure Kubernetes cluster installation using kubeadm with TLS and secure API settings, Harden control plane components, including API server, controller manager, and scheduler, to reduce attack surfaces, and Implement secure etcd configurations, including encryption at rest and access controls.

3. 03

   Role-Based Access Control (RBAC)

   Design and implement RBAC policies to restrict user and service account permissions in Kubernetes, Create roles and cluster roles to enforce least privilege for specific namespaces and resources, and Bind roles to users, groups, or service accounts using role bindings and cluster role bindings.

4. 04

   Network Security and Policies

   Configure network policies to control pod-to-pod and external traffic, restricting unauthorized communication, Implement CNI plugins (e.g., Calico, Cilium) to support advanced network security features, and Secure Ingress controllers and services to prevent exposure of sensitive endpoints.

5. 05

   Pod and Container Security

   Define Pod Security Standards (PSS) to enforce security baselines, such as preventing privileged containers, Configure security contexts for pods and containers to limit privileges, users, and capabilities, and Use AppArmor or Seccomp profiles to restrict system calls and enhance container isolation.

6. 06

   Securing the Software Supply Chain

   Implement image signing and verification using tools like cosign to ensure trusted container images, Configure admission controllers, such as Open Policy Agent (OPA), to enforce image security policies, and Scan container images for vulnerabilities using tools like Trivy or Clair during CI/CD pipelines.

7. 07

   Kubernetes API Security

   Secure the Kubernetes API server with authentication mechanisms, including certificates and tokens, Enable audit logging to track API requests and detect suspicious activities, and Restrict anonymous access and enforce mutual TLS (mTLS) for API communication.

8. 08

   Monitoring and Logging for Security

   Configure centralized logging with tools like Fluentd or Loki to collect and analyze security events, Set up Prometheus and Grafana to monitor cluster security metrics, such as unauthorized access attempts, and Implement runtime security monitoring using tools like Falco to detect anomalous behavior.

9. 09

   Cluster Backup and Recovery

   Back up critical cluster data, including etcd snapshots, to ensure recovery from security breaches, Configure secure backup storage with encryption and access controls for sensitive data, and Practice restoring clusters from backups to minimize downtime during security incidents.

10. 10

    CKS Exam Preparation

    Review the CKS exam structure, including performance-based tasks, time constraints, and scoring criteria, Practice hands-on labs simulating exam scenarios, such as securing clusters and mitigating vulnerabilities, and Master kubectl commands and security tools (e.g., kube-bench, Trivy) required for exam tasks.

Exam format and cost

Questions

Confirm on the vendor site

Duration

Confirm on the vendor site

Format

Confirm question format on the vendor outline

Passing score

Confirm the passing score on the vendor site

Cost

Confirm the current exam fee on the vendor site before you register

Delivery

Confirm delivery options on the vendor site

Languages

Confirm available languages on the vendor site

Experience and eligibility

Must hold a valid CKA certification or equivalent experience in managing Kubernetes clusters, as required by the Linux Foundation for CKS eligibility. Proficiency in Kubernetes concepts, including cluster architecture, networking, storage, and workload management, to effectively engage with advanced security topics.

Renewal

Renewal rules for CKS: Certified Kubernetes Security Specialist are set by CNCF. Many credentials use a multi-year cycle with continuing education, a renewal fee, or a newer exam. Confirm the current cycle on the vendor site.

Roles this credential fits

• This course is tailored for experienced DevOps engineers, Kubernetes administrators, or security professionals seeking to deepen their expertise in protecting Kubernetes-based infrastructure to meet organizational security requirements. Participants will gain comprehensive knowledge of key concepts such as Role-Based Access Control (RBAC), network policies, container security, and audit logging.
• Security
• Teams standardizing on this credential for hiring or compliance

Official sources

• CNCF certification

Always confirm fees, dates, and eligibility on the vendor site before you register. Vendors change outlines and prices without notice.