Practitioner Level

Certified Kubernetes Application Developer (CKAD) Practice Exam - Part 8

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30 minutes
  • 2 Learning Objectives

About this Hands-on Lab

This lab provides practice scenarios to help prepare you for the Certified Kubernetes Application Developer (CKAD) 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 CKAD exam. Good luck!

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Locate and Fix a Failing Liveness Probe

Somewhere in the cluster, there is a Pod that is broken due to a failing liveness probe.

Locate this Pod and record the Namespace and Pod name in the file /home/cloud_user/probe-fix/broken-pod-name.txt. Store the data in the form namespace/podname.

Next, get a list of events for the Pod’s Namespace using kubectl get events. Use the wide output format to retrieve additional information. Store the output of this command in the file /home/cloud_user/probe-fix/events.txt.

Finally, fix the underlying issue with the liveness probe to get the Pod running.

Find the Pod with the Highest CPU Usage

Locate the Pod within the cpu Namespace that is using the most CPU resources.

Save the name of that Pod in the file /home/cloud_user/metrics/high-cpu-pod-name.txt.

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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.

This lab includes a verification script to help you determine whether you have completed the objectives successfully. You can run the verification script with /home/cloud_user/verify.sh.

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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