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The CKAD Exam is designed to test the proficiency of developers in Kubernetes application development and deployment using command-line tools. CKAD exam consists of 19 questions that require candidates to perform tasks in a live Kubernetes cluster environment. CKAD exam is time-bound, and candidates are given two hours to complete it. Linux Foundation Certified Kubernetes Application Developer Exam certification program is vendor-neutral, which means that it is not tied to any specific cloud provider, and it is recognized globally.
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NEW QUESTION # 28
You nave a Deployment running a web application tnat uses secrets to store sensitive information like database credentials. To improve security, you want to use a secret injection mechanism to provide the secret to the pod without exposing it in the deployment YAML.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Secret:
- Create a secret containing the sensitive information:
2. Configure Deployment to Use Secret: - Update the Deployment YAML to mount the secret into the container:
3. Apply the Configuration: - Apply tne Secret and Deployment configuration: bash kubectl apply -f my-secret.yaml kubectl apply -f my-web-app-deployment.yaml 4. Verify Secret Injection: - Access the secret information from within the container using environment variables: - For example, '$DATABASE_USERNAME and '$DATABASE PASSWORD'.
NEW QUESTION # 29
Context
Context
As a Kubernetes application developer you will often find yourself needing to update a running application.
Task
Please complete the following:
* Update the app deployment in the kdpd00202 namespace with a maxSurge of 5% and a maxUnavailable of 2%
* Perform a rolling update of the web1 deployment, changing the Ifccncf/ngmx image version to 1.13
* Roll back the app deployment to the previous version
Answer:
Explanation:
Solution:
NEW QUESTION # 30
You are developing a microservices application consisting of several deployments. One of the deployments, named 'order-service- deployments , is responsible for processing orders. Each order requires a specific backend service to process the order. You need to design a mechanism that automatically assigns an appropriate backend service to each order processing pod based on the order type. For example, orders for "books" should be assigned to the 'book-service' backend, while orders for "electronics" should be assigned to the 'electronics-service backend. Explain how you would implement this dynamic backend service assignment mechanism.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
This scenario requires a mecnanism to dynamically assign a backend service to each order processing pod based on the order type. Here's how you can implement this:
1. Label the Backend Services:
- Label the backend services based on the order type they handle. For instance:
- 'book-service': 'order.type=books'
- 'electronics-service: 'order.type=electronics'
2. I-Ise a ConfigMap:
- Create a ConfigMap named 'order-backend-mapping' that stores the mapping between order types and backend service labels.
- Use the ConfigMap to dynamically assign backend services based on the order type.
3. Modify the Order Service Deployment: - In the 'order-service-deployment , add an init container that retrieves the backend service mapping from the ConfigMap. - Use this mapping to determine the appropriate backend service for each order. - The init container can inject environment variables or modify the pod's annotations based on the mapping.
4. Update the Order Service: - Ensure the 'order-service' container is configured to use the environment variable set by the init container to access the correct backend service. 5. Deploy the Changes: - Apply the updated ConfigMap and Deployment using 'kubectl apply' 6. Test the Dynamic Assignment: - Create orders of different types and verity that the 'order-service' pods are automatically assigned the correct backend services. ,
NEW QUESTION # 31
You have a Deployment running with a specific image tag, and you want to roll out a new version with a different image tag- However, you want to ensure that the update process is gradual, and only one pod is updated at a time. Additional'" you need to monitor the performance metrics of the application during the update, and if the performance degrades significantly, you need to rollback to the previous version How would you implement this using Kustomize and other Kubernetes features?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a customization file:
resources :
- deployment. yaml
2. Create a deployment-yaml file:
3. Configure a rolling update strategy: - Edit the 'deployment.yamr file and add the following to the 'spec-strategy' section:
4. Set up monitoring with Prometheus and Grafana: - Install Prometheus and Grafana on your Kubernetes cluster. - Configure Prometheus to scrape metrics from your application pods. - Create Grafana dashboards to visualize the relevant metrics. 5. Create an alert in Prometheus: - Define an alert that triggers if the application's performance degrades significantly - This alert should be configured to send notifications to your team. 6. Create a rollback mechanism: - IJse a script or a tool like 'oubect1 rollout undo' to rollback the deployment to the previous version if the performance alert is triggered. 7. Update the deployment with the new image tag: - Edit the 'deployment-yamp file and change the 'image' to 'example/nginx:v2 8. Apply the changes to your Kubernetes cluster: bash oubect1 apply -f deployment-yaml - The 'maxSurge' and 'maxunavailable' settings in the 'rollinglJpdate' strategy control the maximum number of pods that can be added or removed during the update process. - Prometheus and Grafana provide a way to monitor the performance metrics of your application. - The Prometheus alert helps you identify if the performance degrades significantly during the update process. - The rollback mechanism allows you to revert to the previous version if the performance alert is triggered. - This setup ensures a gradual update process and provides a mechanism to mitigate potential performance issues. ,
NEW QUESTION # 32
Exhibit:
Task
You have rolled out a new pod to your infrastructure and now you need to allow it to communicate with the web and storage pods but nothing else. Given the running pod kdsn00201 -newpod edit it to use a network policy that will allow it to send and receive traffic only to and from the web and storage pods.
Answer: A
NEW QUESTION # 33
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