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Linux Foundation CKA (Certified Kubernetes Administrator) Program is a certification exam designed to test the skills of individuals who work with Kubernetes. Kubernetes is an open-source platform that is used to automate the deployment, scaling, and management of containerized applications. The CKA exam is designed to validate an individual's understanding of Kubernetes and their ability to deploy, configure, and troubleshoot Kubernetes clusters.
If you are interested in Kubernetes administration and want to prove your expertise in this area, the Linux Foundation CKA program is the perfect certification for you. The program is designed to test your skills in Kubernetes administration and provides a certification that is recognized by the industry. Whether you are a system administrator, DevOps engineer, or cloud administrator, the CKA program can help you advance your career in the IT industry.
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The CKA Program Certification Exam is highly regarded in the industry and is recognized as a valuable credential for Kubernetes administrators. Certified Kubernetes Administrator (CKA) Program Exam certification demonstrates that the candidate has the skills and knowledge required to design, deploy, and maintain Kubernetes clusters in production environments. CKA Exam is designed to be challenging, and candidates are expected to have a strong understanding of Kubernetes architecture, networking, storage, and security. Certified Kubernetes Administrator (CKA) Program Exam certification is valid for two years, after which candidates must recertify to maintain their credentials.
NEW QUESTION # 75
Perform the following tasks:
Add an init container to hungry-bear (which has been defined in spec file /opt/KUCC00108/pod-spec-KUC C00108.yaml ) The init container should create an empty file named /workdir/calm.txt If /workdir/calm.txt is not detected, the pod should exit Once the spec file has been updated with the init container definition, the pod should be created
Answer:
Explanation:
solution
NEW QUESTION # 76
Create a Pod nginx and specify a CPU request and a CPU limit of 0.5 and 1 respectively.
Answer: A
NEW QUESTION # 77
Scale the deployment webserver to
Answer:
Explanation:
See the solution below.
Explanation
solution
F:\Work\Data Entry Work\Data Entry\20200827\CKA\14 B.JPG
NEW QUESTION # 78
You are running an application in Kubernetes using a Deployment that defines 3 replicas. You need to perform a rolling update to the Deployment to upgrade the application to a new version. During the update process, you want to ensure that at least 2 replicas are always available, and the maximum number of new pods that can be created at the same time is also limited to 1. How can you configure the Deployment to achieve this rolling update strategy?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update Deployment YAML:
- Update the 'spec.replicas' field to the desired number of replicas for the new version.
- In the 'spec.strategy.rollingUpdate' section, set the 'maxUnavailable' to 1, meaning that only one pod can be unavailable during the update process.
- Set the maxSurge' to 1, limiting the number of new pods that can be created simultaneously to 1.
2. Apply the Updated Deployment: - Use 'kubectl apply -f deployment.yaml' to apply the changes to your cluster. 3. Monitor the Update Process: - Use 'kubectl get pods -l app=my-app' to monitor the pods. You will see a rolling update in progress: - One old pod will be terminated at a time. - One new pod will be created at a time. - The update will continue until all replicas are updated to the new version. 4. Verify the Update: - Once the update is complete, use 'kubectl describe deployment my-deployment' to check the deployment status. The 'updatedReplicas' field should match the 'replicas' field, indicating that the update was successful. By using 'maxUnavailable' and 'maxSurge' you control the number of unavailable and surge pods during the update process. This ensures a safe and controlled rolling update strategy.,
NEW QUESTION # 79
Quick Reference
ConfigMaps,
Documentation Deployments,
Namespace
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh cka000048b
Task
An NGINX Deployment named nginx-static is running in the nginx-static namespace. It is configured using a ConfigMap named nginx-config .
First, update the nginx-config ConfigMap to also allow TLSv1.2. connections.
You may re-create, restart, or scale resources as necessary.
You can use the following command to test the changes:
[candidate@cka000048b] $ curl -- tls-max
1.2 https://web.k8s.local
Answer:
Explanation:
Task Summary
* SSH into cka000048b
* Update the nginx-config ConfigMap in the nginx-static namespace to allow TLSv1.2
* Ensure the nginx-static Deployment picks up the new config
* Verify the change using the provided curl command
Step-by-Step Instructions
Step 1: SSH into the correct host
ssh cka000048b
Step 2: Get the ConfigMap
kubectl get configmap nginx-config -n nginx-static -o yaml > nginx-config.yaml Open the file for editing:
nano nginx-config.yaml
Look for the TLS configuration in the data field. You are likely to find something like:
ssl_protocols TLSv1.3;
Modify it to include TLSv1.2 as well:
ssl_protocols TLSv1.2 TLSv1.3;
Save and exit the file.
Now update the ConfigMap:
kubectl apply -f nginx-config.yaml
Step 3: Restart the NGINX pods to pick up the new ConfigMap
Pods will not reload a ConfigMap automatically unless it's mounted in a way that supports dynamic reload and the app is watching for it (NGINX typically doesn't by default).
The safest way is to restart the pods:
Option 1: Roll the deployment
kubectl rollout restart deployment nginx-static -n nginx-static
Option 2: Delete pods to force recreation
kubectl delete pod -n nginx-static -l app=nginx-static
Step 4: Verify using curl
Use the provided curl command to confirm that TLS 1.2 is accepted:
curl --tls-max 1.2 https://web.k8s.local
A successful response means the TLS configuration is correct.
Final Command Summary
ssh cka000048b
kubectl get configmap nginx-config -n nginx-static -o yaml > nginx-config.yaml nano nginx-config.yaml # Modify to include "ssl_protocols TLSv1.2 TLSv1.3;" kubectl apply -f nginx-config.yaml kubectl rollout restart deployment nginx-static -n nginx-static
# or
kubectl delete pod -n nginx-static -l app=nginx-static
curl --tls-max 1.2 https://web.k8s.local
NEW QUESTION # 80
......
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