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Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q187-Q192):

NEW QUESTION # 187
Refer to Exhibit.

Task:
1) First update the Deployment cka00017-deployment in the ckad00017 namespace:
*To run 2 replicas of the pod
*Add the following label on the pod:
Role userUI
2) Next, Create a NodePort Service named cherry in the ckad00017 nmespace exposing the ckad00017-deployment Deployment on TCP port 8888

Answer:

Explanation:
Solution:

NEW QUESTION # 188
You have a microservice application that is deployed as a Deployment. You want to implement a mechanism to handle temporary network issues or other transient failures that may occur during the application's communication with external services. Explain how you can use readiness probes and liveness probes in combination with a restart policy to address these failures.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Readiness Probes:
- Add a 'readinessProbe' to the container spec of your application pods.
- The probe should check the health and readiness of the application to receive incoming requests.
- This probe should be executed periodically.
- If the probe fails, the pod will be considered not ready and won't receive traffic.
- Example using a TCP socket check:

2. Define Liveness Probes: - Add a 'livenessProbe' to the container spec of your application pods- - This probe should check the health of the application pod itself. - It should be executed periodically to detect issues that might not affect readiness but indicate a problem with the application. - If the liveness probe fails for a specified number of consecutive attempts, the pod will be restarted. - Example using a HTTP endpoint cneck:

3. Set Restart Policy: - Ensure that the restart policy for the pod is set to 'Always' (the default) to automatically restart the pod upon failure detected by the liveness probe. 4. Implement Health Check Endpoints: - Implement the health check endpoints within your application (e.g., ' Ihealth' for the liveness probe, a simple TCP connection for the readiness probe) to allow probes to assess the nealth of the application and its dependencies. 5. Verify and Monitor: - Deploy the updated Deployment and simulate network failures or other transient issues. - Monitor the pods' health and observe that they are automatically restarted and marked as not ready when necessary, ensuring continued application availability despite temporary disruptions.

NEW QUESTION # 189
You are tasked with deploying a complex application using Helm. The application consists of multiple microservices, each with its own deployment and service. To simplify the deployment and management of these microservices, you need to implement a mecnanism that allows you to automatically create and manage namespaces based on the name of the Helm release.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Custom Helm Chart:
- Begin by creating a custom Helm chart named 'my-app-chart' to manage the application's multiple microservices.
2. Implement a Namespace Creation Function:
- Within the 'my-app-chafltemplatesr directory, create a file named 'namespace-yamr and define the namespace creation function.

- This function uses the Helm release name to dynamically generate a namespace with the format '-namespace' 3. Add the Namespace to the Chan: - Modify the 'my-app-chart/templates/service.yamr and 'my-app-chart/templates/deployment_yamr for each microservice to ensure the deployments and services reside within the dynamically created namespace:

4. Deploy the Chart with Different Releases: - Use tne following command to deploy tne chart with different releases, each creating a separate namespace: bash nelm install release1 my-app-chart helm install release2 my-app-chart - This will create namespaces release1-namespace' and release2-namespace , each containing the deployments and services of the respective releases. 5. Manage and Clean Up: - To manage and clean up the deployments and namespaces, you can use regular Helm commands within the context or each namespace: bash kubectl --namespace release1 -namespace get pods helm delete release1 kubectl delete namespace release1-namespace - This approach provides a structured and automated method for managing multiple microservices within separate namespaces using Helm releases.,

NEW QUESTION # 190

Context
You have been tasked with scaling an existing deployment for availability, and creating a service to expose the deployment within your infrastructure.
Task
Start with the deployment named kdsn00101-deployment which has already been deployed to the namespace kdsn00101 . Edit it to:
* Add the func=webFrontEnd key/value label to the pod template metadata to identify the pod for the service definition
* Have 4 replicas
Next, create ana deploy in namespace kdsn00l01 a service that accomplishes the following:
* Exposes the service on TCP port 8080
* is mapped to me pods defined by the specification of kdsn00l01-deployment
* Is of type NodePort
* Has a name of cherry

Answer:

Explanation:
See the solution below.
Explanation
Solution:

NEW QUESTION # 191
You are running a web application on a Kubernetes cluster, and you want to ensure that thecontainer running your application is protected from potential security vulnerabilities. You are specifically concerned about unauthorized access to the container's filesystem. Explain how you would implement AppArmor profiles to restrict access to the container's filesystem.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the AppArmor Profile:
- Create a new AppArmor profile file, for example, 'nginx-apparmor.conf, within your Kubernetes configuration directory.
- Within this file, define the restrictions for the container.
- For instance, to allow access to specific directories and files:
# include common AppArmor profile
include /etc/apparmor.d/abstractions/base/nginx.apparmor
# Allow access to specific directories
/var/www/html r,
/etc/nginx r,
# Allow access to specific files
/etc/nginx/nginx.conf r,
/usr/sbin/nginx r,
# Deny access to all other files and directories
Deny
2. Load the AppArmor Profile:
- Use the create configmap' command to create a ConfigMap containing your AppArmor profile:
Bash
kubectl create configmap nginx-apparmor-profile --from-file=nginx-apparmor.conf
3. Apply the Profile to Your Deployment:
- Update your Deployment YAML file to include the AppArmor profile:

4. Restart the Pods: - Apply the updated Deployment YAML using 'kubectl apply -f nginx-deployment.yaml' - The updated deployment will restart the pods with the new AppArmor profile. 5. Verify the Profile: - Check the status of the pods with 'kubectl describe pod - Look for the "Security Context" section and verify that the AppArmor profile is correctly applied. 6. Test the Restrictions: - Try to access files or directories that are not allowed by your AppArmor profile. - This will help you confirm that the profile is effectively restricting access.

NEW QUESTION # 192
......

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Zach Moss Zach Moss

個人簡介

CKAD Dumps Reviews & CKAD Valid Braindumps Files

HOT CKAD Dumps Reviews - The Best Linux Foundation Linux Foundation Certified Kubernetes Application Developer Exam - CKAD Valid Braindumps Files

Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q187-Q192):

CKAD Dumps Reviews | High Pass-Rate CKAD: Linux Foundation Certified Kubernetes Application Developer Exam 100% Pass

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