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Linux Foundation Certified Kubernetes Application Developer (CKAD) exam is a certification program designed to evaluate and certify the skills and knowledge of developers in using Kubernetes to develop cloud-native applications. The CKAD Certification is recognized worldwide as a benchmark for Kubernetes application development expertise, and it validates the ability of developers to create and deploy cloud-native applications using Kubernetes.
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Linux Foundation CKAD (Linux Foundation Certified Kubernetes Application Developer) Certification Exam is a popular certification program designed for developers who wish to validate their skills in developing and deploying applications on Kubernetes clusters. Kubernetes is a powerful and widely-used open-source platform for container orchestration, and it is increasingly being adopted by organizations to manage their containerized applications. The CKAD Certification Exam is one of the most sought-after certifications in the industry, and it is recognized by leading companies around the world.
NEW QUESTION # 80
You are deploying a new application named 'ecommerce-app' that requires 10 replicas. You want to implement a rolling update strategy that ensures only two pods are unavailable at any given time, while also allowing for the creation of three new poos simultaneously.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAMLI
- Update the 'replicas to 10.
- Define 'maxiJnavaiIabIe: 2 and 'maxSurge: 3' in the 'strategy.roIIingLJpdate section.
- Configure a 'strategy-type' to 'RollinglJpdate' to trigger a rolling update when the deployment is updated.
- Add a 'spec-template.spec.imagePullPolicy: Always' to ensure that the new image is pulled even if it exists in the pod's local cache.
2. Create the Deployment - Apply the updated YAML file using 'kubectl apply -f ecommerce-app-deployment.yaml' 3. Verify the Deployment: - Check the status of the deployment using 'kubectl get deployments ecommerce-app-deployment to confirm the rollout and updated replica count. 4. Trigger the Automatic Update: - Push a new image to the 'example/ecommerce-app:latest' Docker Hub repository. 5. Monitor the Deployment: - Use 'kubectl get pods -l app=ecommerce-apps to monitor the pod updates during the rolling update process. You will observe that two pods are terminated at a time, while three new pods with the updated image are created. 6. Check for Successful Update: - Once the deployment is complete, use 'kubectl describe deployment ecommerce-app-deployment to see that the 'updatedReplicas' field matches the 'replicas' field, indicating a successful update.
NEW QUESTION # 81
You have a ConfigMap named 'database-config' tnat stores sensitive information for connecting to a database. You want to ensure that this ConfigMap is only accessible by a specific namespace and not by other namespaces in the cluster.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Namespace:
bash
kubectl create namespace my-database-namespace
2. Move the ConfigMap to the Namespace:
bash
kubectl move configmap database-config -n my-database-namespace
3. Configure Role-Based Access Control (RBAC):
- Create a Role:
- Create a RoleBinding:
- Replace 'my-service-account with the actual name of the service account that needs access to the ConfigMap. 4. Apply the Role and Role3inding: bash kubectl apply -f database-config-reader.yaml kubectl apply -f database-config-reader-binding.yaml 5. Verify Access: - From the 'my-database-namespace': bash kubectl get configmap database-config -n my-database-namespace The command should succeed as the service account in this namespace has the necessary permissions. - From a different namespace: bash kubectl get configmap database-config -n another-namespace This command should fail as the service account in this namespace does not have access to the ConfigMap. This solution uses RBAC to restrict access to the ConfigMap to only the service account in the 'my-database-namespace'. This ensures that sensitive information is only accessible by authorized entities within the cluster,
NEW QUESTION # 82
You have a Deployment named 'wordpress-deployment' that runs 3 replicas of a WordPress container. You need to implement a persistent volume claim (PVC) for each pod that stores the website data, and you want to ensure that the data persists even if the pod is deleted or restarted. The PVC should be created using a storage class named 'standard' with a capacity of 10Gi.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
I). Create a Storage Class:
- Create a 'standard' storage class:
- Apply the YAML file: bash kubectl apply -f standard-storage-class-yaml 2. Create a Persistent Volume Claim: - Create a PVC named 'wordpress-pvc' with a request for IOGi storage and using the 'standard' storage class:
- Apply the YAML file: bash kubectl apply -f wordpress-pvc.yaml 3. Update the Deployment - Update the Swordpress-deployment' YAML file to mount the PVC to each pod:
- Apply the updated YAML file: bash kubectl apply -f wordpress-deployment_yaml 4. Verify the Deployment - Check the status of the deployment using 'kubectl get deployments wordpress-deployment' to confirm the rollout and updated replica count. - Use 'kubectl describe pods -l app=wordpress' to confirm that each pod is using the 'wordpress-pvc' and the website data is stored in the persistent volume. - You can now access the WordPress website through the service that is associated with the Deployment. 5. Test Data Persistence: - Delete or restan one of the pods in the deployment. - Observe that the website data remains intact because the PVC is persistent and the data is stored in the underlying volume.,
NEW QUESTION # 83
You are running a web application in a Kubernetes cluster. You have a deployment named 'web- app' with two replicas. You need to implement a Network Policy that allows only traffic from pods with the label app: database' to access the 'web-app' deployment on port 8080. You also need to block all other traffic to the 'web-app' deployment.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Network Policy:
- Create a YAML file named 'web-app-network-policy.yamr with the following content:
2. Apply the Network Policy: - Apply the Network Policy to your cluster: bash kubectl apply -f web-app-network-policy.yaml 3. Verify the Network Policy: - Verify that the Network Policy has been applied correctly by listing the Network Policies in your namespace: bash kubectl get networkpolicies -n default # Replace with your namespace You should see the 'web-app-network-policy' listed. 4. Test the Network Policy: - From a pod with the label 'app: database' , try to access the 'web-app' deployment on port 8080. This should be successful. - From any other pod, try to access the 'web-app' deployment on port 8080. This should be blocked. - The 'podSelector' in the Network Policy specifies that it applies to pods with the label 'app: web-app'. - The 'ingress' section defines the allowed incoming traffic. In this case, it allows traffic from pods with the label 'app: database' on port 8080. - The 'egress' section defines the allowed outgoing traffic. In this case, it allows all outgoing traffic except on port 8080. This ensures that only pods with the 'app: database' label can access the 'web-ap$ deployment on port 8080. Note: - You may need to update the 'namespace' in the Network Policy YAML file to match the namespace where your 'web-app' deployment is running. - Make sure that pods with the label 'app: database' are allowed to access the 'web-app' deployment by other means, such as Service or Ingress, if needed.,
NEW QUESTION # 84
Exhibit:
Context
You are tasked to create a secret and consume the secret in a pod using environment variables as follow:
Task
* Create a secret named another-secret with a key/value pair; key1/value4
* Start an nginx pod named nginx-secret using container image nginx, and add an environment variable exposing the value of the secret key key 1, using COOL_VARIABLE as the name for the environment variable inside the pod
Answer: A
NEW QUESTION # 85
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