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| Certification Vendor: | Linux Foundation / Cloud Native Computing Foundation (CNCF) |
|---|---|
| Exam Name: | Certified Kubernetes Administrator (CKA) Program Exam |
| Exam Number: | CKA |
| Exam Duration: | 120 minutes |
| Real Exam Qty: | 15-20 performance-based tasks |
| Certificate Validity Period: | 2 years |
| Related Certifications: | Certified Kubernetes Security Specialist (CKS) Certified Kubernetes Application Developer (CKAD) |
| Exam Price: | $445 USD |
| Available Languages: | English, Japanese, Simplified Chinese |
| Passing Score: | 66% |
| Exam Format: | Performance-based, Online proctored, Command-line tasks, Hands-on in real Kubernetes environment |
| Recommended Training: | Introduction to Kubernetes (Free Course) LFS258: Kubernetes Fundamentals |
| Exam Registration: | Linux Foundation Training Portal |
| Sample Questions: | Linux Foundation CKA Sample Questions |
| Exam Way: | Online, remotely proctored via PSI; browser-based terminal environment |
| Pre Condition: | No formal prerequisites; basic Linux and Kubernetes knowledge recommended |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/certified-kubernetes-administrator-cka/ |
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The CNCF Certified Kubernetes Administrator exam is a 90-minute, 60-multiple choice question test that will be administered at one of Brightworks locations. The official study guide will contain a large portion of the available questions. The client preparation for this exam will be performed through simulated test-taking. Content of the exam will be strictly limited to material covered in the official study guide. Class time will be used for a detailed walk-through of this study guide. Appearing in the actual exam, some questions will be presented in a form of diagram or table to test knowledge of best practices for specific applications. Complete preparation for the exam should include the use of a Kubernetes cloud platform such as kubeadm to test infrastructure in a learn-by-doing approach. Limited to one attempt, rescheduling of exams is possible only in the event of an emergency.
Windows, Linux, and MacOS are all supported for this exam. Verified cloud platforms for this exam include:
NEW QUESTION # 22
Create a Kubernetes secret as follows:
* Name: super-secret
* password: bob
Create a pod named pod-secrets-via-file, using the redis Image, which mounts a secret named super-secret at
/secrets.
Answer:
Explanation:
Create a second pod named pod-secrets-via-env, using the redis Image, which exports password as CONFIDENTIAL See the solution below.
Explanation
solution
NEW QUESTION # 23
Create 2 nginx image pods in which one of them is labelled with env=prod and another one labelled with env=dev and verify the same.
Answer:
Explanation:
See the solution below.
Explanation
kubectl run --generator=run-pod/v1 --image=nginx -- labels=env=prod nginx-prod --dry-run -o yaml > nginx-prodpod.yaml Now, edit nginx-prod-pod.yaml file and remove entries like "creationTimestamp: null"
"dnsPolicy: ClusterFirst"
vim nginx-prod-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
env: prod
name: nginx-prod
spec:
containers:
- image: nginx
name: nginx-prod
restartPolicy: Always
# kubectl create -f nginx-prod-pod.yaml
kubectl run --generator=run-pod/v1 --image=nginx --
labels=env=dev nginx-dev --dry-run -o yaml > nginx-dev-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
env: dev
name: nginx-dev
spec:
containers:
- image: nginx
name: nginx-dev
restartPolicy: Always
# kubectl create -f nginx-prod-dev.yaml
Verify :
kubectl get po --show-labels
kubectl get po -l env=prod
kubectl get po -l env=dev
NEW QUESTION # 24
List "nginx-dev" and "nginx-prod" pod and delete those pods
Answer:
Explanation:
kubect1 get pods -o wide
kubectl delete po "nginx-dev" kubectl delete po "nginx-prod"
NEW QUESTION # 25
Create a namespace called 'development' and a pod with image nginx called nginx on this namespace.
Answer:
Explanation:
See the solution below.
Explanation
kubectl create namespace development
kubectl run nginx --image=nginx --restart=Never -n development
NEW QUESTION # 26
You have a StatefulSet named 'mysql-cluster' running a MySQL database with 3 replicas. You want to add a new replica to the cluster without disrupting the existing database operations. How do you achieve this while ensuring data consistency and minimal downtime?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Scale up the StatefulSet:
- Increase the 'replicas' value in the StatefulSet definition from 3 to 4. Apply the change using 'kubectl apply -f mysql-cluster.yaml'
2. Wait for the new pod to be created: - Monitor the pod creation process using 'kubectl get pods -l app=mysql-cluster'. Wait for the new pod to be created and enter a ready state. 3. Join the new pod to the cluster: - In the new pod's shell, execute the following command to join the existing MySQL cluster: Bash mysql -h -u -p -e "CHANGE MASTER TO MASTER PASSWORD=", MASTER DELAY=O" - Replace with the IP address of one of the existing MySQL replicas. - Replace , and '3306' with the appropriate values for your MySQL setup. 4. Verify the new replica is synchronized: - Use "SHOW SLAVE STATUS" command on the new replica to verify that it's successfully replicating data from the existing cluster. Ensure that the 'Slave 10 Running' and 'Slave SQL Running' statuses are both set to 'Yes'. 5. Promote the new replica: - Promote the new replica to a full member of the cluster by updating the StatefulSet definition to include the new pod's hostname. This will typically involve adding a new entry to the 'volumeClaimTemplates' section of the StatefulSet. 6. Test the cluster's health: - Run a series of read and write operations on the database to verify that the new replica is fully integrated and responding correctly. 7. Remove the old pod: - You can now delete the old pod that had the lowest pod index. This will trigger the automatic cleanup of the old volume, ensuring that only the healthy and synchronized replicas remain. By following these steps, you can add a new replica to your MySQL cluster while ensuring minimal downtime and preserving data consistency. ]
NEW QUESTION # 27
......
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