Is the CKS Worth It?

The Certified Kubernetes Security Specialist (CKS) is for Kubernetes professionals who want to build expertise in security. In this article, we will share information on the CKS, so you can decide if both the time and financial investment of the CKS is worth it for you. 

What is the CKS?

The CKS is an advanced Kubernetes certification that helps you build the skills, knowledge, and competence on a broad range of best practices for securing container-based applications and Kubernetes platforms during build, deployment, and runtime. 

To take the CKS exam, you must first pass the Certified Kubernetes Administrator (CKA) exam, which requires a wide range of knowledge in Kubernetes (K8S) platforms. 

The performance-based online exam tests your knowledge of Kubernetes and cloud security in a simulated, real-world environment. The exam is proctored, and you will have two hours to complete it. 

What does the CKS test?

The CKS covers a wide range of security topics. The following explanations are not exhaustive, but they will give you a general idea of what to expect. 

Here is each domain with its weight:

• Cluster Setup (10%). Cluster setup is ensuring all clusters are created according to security guidelines. You will be tested on protecting node metadata and K8S API endpoints. You will also need to understand how to use CIS benchmark to check for security vulnerabilities, particularly in kube-api, kubelet, etcd, and kubedns.

• Cluster Hardening (15%). The cluster hardening domain focuses on securing an existing cluster. This topic will test you on Role-based Access Control (RBAC), least privileged access service accounts, and ensuring your Kubernetes is on the latest version.

• System Hardening (15%). System Hardening, as opposed to Cluster Hardening, deals with the actual OS in the containers themselves. This domain will test your knowledge on reducing host OS attack surface. It will also test your competency in third-party tools, such as seccomp and AppArmor. The candidate will also be expected to have a thorough understanding of IAM roles.

• Minimize Microservice Vulnerabilities (20%). This domain ensures you can responsibly manage K8S secrets, implement pod-to-pod encryption and execute best practices in cluster environments.

• Supply Chain Security (20%). Container-based applications require a repository, such as DockerHub, to pull down images. It’s critical to ensure those containers are secure and sanitized. With that being said, you will be expected to understand third-party security compliance software such as trivy and falco to scan Docker images. You will also need to know how to create Image Policy Webhooks to whitelist containers.

• Monitor, Logging, and Runtime Security (20%). The final domain expects the candidate to know how to analyze logs to detect security vulnerabilities within clusters and containers.

How Much Does the CKS Cost?

The exam costs $395. Or you can purchase a bundle of the CKS and CKA exams for $675. Just remember, while you can pay for the CKS exam and schedule it before taking the CKA exam, you must actually have passed the CKA before sitting down for the CKS.

Who should take the CKS?

The CKS is ideal for the following professionals:

• Security architect. A security architect’s primary focus is creating policies for an organization that will assist in mitigating security threats. There is no better way to understand the security layout of Kubernetes than getting a CKS certificate.

• Kubernetes administrator. A Kubernetes administrator ensures all users have safe and reliable access to their clusters. Earning a CKS will ensure administrative tasks are accomplished using the latest security compliance recommendations.

• Security consultant. Large corporations often hire consultants to conduct scans, audits, pen testing and more to ensure their organization has a strong security posture. Having a CKS can create work opportunities for consultants.

Is the CKS worth it?

The short answer is “Yes.” If you have or want a career in cybersecurity, it is worth it to get the CKS. 

If you have already earned the CKA and CKAD, it’s a great idea to get the third and final CKS certification, especially if you are involved with Kubernetes administration. 

Additionally, the CKS can help you: 

• Build new skills and validate existing ones. Even if you have expertise in Kubernetes, taking the CKS will provide you with a solid understanding of Kubernetes security. 

• Advance in your career. The exam demonstrates expertise in an important area of cybersecurity, and it looks great on a resume when you are job hunting. Growing your skills in this way could also create new opportunities within your existing organization. 

 Final thought: The CKS is challenging, but ultimately, it is a great way to build your cybersecurity and Kubernetes expertise. 

Need help preparing? Check out our Kubernetes Security Specialist (CKS) exam online training. Not a subscriber? Sign up for a one-week no-strings-attached trial to explore all our Kubernetes courses!