Practitioner Level

Certified Kubernetes Security Specialist (CKS) - Practice Exam Part 10

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30 minutes
  • 3 Learning Objectives

About this Hands-on Lab

This lab provides practice scenarios to help prepare you for the Certified Kubernetes Security Specialist (CKS) exam. You will be presented with tasks to complete, as well as server(s) and/or an existing Kubernetes cluster to complete them in. You will need to use your knowledge of Kubernetes to successfully complete the provided tasks, much like you would on the real CKS exam. Good luck!

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Analyze a Dockerfile for Security Best Practices
  1. Check the Dockerfile located at /home/cloud_user/Dockerfile on the CLI server. This Dockerfile is based upon alpine:3.13.5.
  2. Correct the two security issues within the file.

Note: If you need an OS user, you can use the user nobody with id 65534.

Analyze a YAML File for Security Best Practices
  1. Check the YAML file located at /home/cloud_user/scooby-gang-deploy.yml on the CLI server.
  2. Correct the two security issues within the file.

Note: If you need an OS user, you can use the user nobody with id 65534.

Ensure Containers Are Static and Immutable

  1. Check all of the Pods in the sunnydale namespace and determine whether their containers are static and immutable.

    Note: In this scenario, static/immutable means that:

    • The container does not have access to any elevated privileges.
    • The container process cannot write to the container file system.

  2. Delete any Pods in the namespace that are not static and immutable.

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Additional Resources

Use the provided environment to complete the tasks detailed in the learning objectives.

You can access all components of the cluster from the CLI server. The control plane server is k8s-control, and the worker is k8s-worker1. If you need to log in to the control plane server, for example, just use ssh k8s-control from the CLI server.

You can also use kubectl from the CLI server, control plane node, or worker to interact with the cluster. In order to use kubectl from the CLI server, you will need to select the acgk8s cluster to interact with, like so: kubectl config use-context acgk8s.

kubectl is aliased to k, and kubernetes autocompletion is enabled. You can use the k alias like so: k get pods.

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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