/CKA-Certified-Kubernetes-Administrator

Your ultimate resource for acing the CKA exam on your first attempt! This repo offers detailed explanations, hands-on labs, and essential study materials, empowering aspiring Kubernetes administrators to master their skills and achieve certification success. Unlock your Kubernetes potential today!

MIT LicenseMIT

☸️ Certified Kubernetes Administrator (CKA) Study Guide for December 2024

CKA EXAM

The Certified Kubernetes Administrator (CKA) certification exam certifies that candidates have the skills, knowledge, and competency to perform the responsibilities of Kubernetes administrators.

CKA Exam details

CKA Exam Details Information
Exam Type Performance Based NOT MCQ )
Exam Duration 2 hours
Pass Percentage 66%
CKA Exam Kubernetes Version Kubernetes v1.31
CKA Validity 2 Years
Exam Cost $395 USD (GET 30% OFF using Coupon TECK30) 💥INCREASE PRICE: $434 in January 2025

💰💰 [50% OFF] Kubernetes Certification Coupon CKA

Save 50% using Coupon code CYBER24CC on all the Linux Foundation training and certification programs. This is a limited-time offer for this month. This offer is applicable for CKA, CKAD, CKS, KCNA, LFCS, PCA FINOPS, NodeJS, CHFA, and all the other certification, training, and BootCamp programs.

Announcement: The CKA exam syllabus will be updated on January 15th, 2025. Read our CKA exam update [blog] (https://teckbootcamps.com/cka-exam-update-new-features-and-removed-content-explained/) to learn more.

CKA Exam Syllabus (Kubernetes 1.31)

Topic Concepts Weightage
Cluster Architecture, Installation & Configuration - 25% 1. Manage role-based access control (RBAC)
2. Use Kubeadm to install a basic cluster
3. Manage a highly-available Kubernetes cluster
4. Provision underlying infrastructure to deploy a Kubernetes cluster
5. Perform a version upgrade on a Kubernetes cluster using Kubeadm
6. Implement etcd backup and restore		 25%
Workloads & Scheduling - 15% 1. Understand deployments and how to perform rolling updates and rollbacks
2. Use ConfigMaps and Secrets to configure applications
3. Know how to scale applications
4. Understand the primitives used to create robust, self-healing application deployments
5. Understand how resource limits can affect Pod scheduling
6. Awareness of manifest management and common templating tools		 15%
Services & Networking - 20% 1. Understand host networking configuration on the cluster nodes
2. Understand connectivity between Pods
3. Understand ClusterIP, NodePort, LoadBalancer service types and endpoints
4. Know how to use Ingress controllers and Ingress resources
5. Know how to configure and use CoreDNS
6. Choose an appropriate container network interface plugin		 20%
Storage - 10% 1. Understand storage classes and persistent volumes
2. Understand volume modes, access modes, and reclaim policies for volumes
3. Understand persistent volume claims primitive
4. Know how to configure applications with persistent storage		 10%
Troubleshooting - 30% 1. Evaluate cluster and node logging
2. Understand how to monitor applications
3. Manage container stdout & stderr logs
4. Troubleshoot application failure
5. Troubleshoot cluster component failure
6. Troubleshoot networking		 30%

CKA Exam Questions And Answers

Practice a lot with Kubernetes:

Additional Resources

Practice

Practice a lot with Kubernetes:

kubectl Ninja

Tip: Use kubectl Cheatsheet during the exam. You don't need to decorate everything.

Useful commands or parameters during the exam:

# Use "kubectl describe" for related events and troubleshooting
kubectl describe pods <podid>

# Use "kubectl explain" to check the structure of a resource object.
kubectl explain deployment --recursive

## Add "-o wide" in order to use wide output, which gives you more details.
kubectl get pods -o wide

## Check always all namespaces by including "--all-namespaces"
kubectl get pods --all-namespaces

Generate a manifest template from imperative spec using the output option "-o yaml" and the parameter "--dry-run=client":

# create a service
kubectl create service clusterip my-service --tcp=8080 --dry-run=client -o yaml

# create a deployment
kubectl create deployment nginx --image=nginx --dry-run=client -o yaml

# create a pod
kubectl run nginx --image=nginx --restart=Never --dry-run=client -o yaml

Create resources using kubectl + stdin instead of creating them from manifest files. It helps a lot and saves time. You can use the output of the command above and modify as required:

cat <<EOF | kubectl create -f -
...
EOF

It saves lots of time, believe me.

Kubectl Autocomplete

source <(kubectl completion bash)

TIPS

  • 💬 Be fast Use the history command to reuse already entered commands or use even faster history search through Ctrl r .

If a command takes some time to execute, like sometimes kubectl delete pod x. You can put a task in the background using Ctrl z and pull it back into foreground running command fg.

You can delete pods fast with:

k delete pod x --grace-period 0 --force

k delete pod x $now # if export from above is configured
  • 💬 Vim

Be great with vim.

toggle vim line numbers

When in vim you can press Esc and type :set number or :set nonumber followed by Enter to toggle line numbers. This can be useful when finding syntax errors based on line - but can be bad when wanting to mark&copy by mouse. You can also just jump to a line number with Esc :22 + Enter.

copy&paste

Get used to copy/paste/cut with vim:

Mark lines: Esc+V (then arrow keys)
Copy marked lines: y
Cut marked lines: d
Past lines: p or P
Indent multiple lines

To indent multiple lines press Esc and type :set shiftwidth=2. First mark multiple lines using Shift v and the up/down keys. Then to indent the marked lines press > or <. You can then press . to repeat the action.

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