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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Observability and Maintenance | 15% | - Debugging in Kubernetes - Use built-in CLI tools to monitor Kubernetes applications - Implement probes and health checks - Understand API deprecation policies - Utilize container logs |
| Topic 2: Application Design and Build | 20% | - Choose and use the right workload resource (Deployment, DaemonSet, CronJob, etc.) - Understand multi-container Pod design patterns (e.g., sidecar, init and others) - Define, build and modify container images - Utilize persistent and ephemeral volumes |
| Topic 3: Application Deployment | 20% | - Use Kubernetes primitives to implement common deployment strategies (e.g., blue/green or canary) - Kustomize - Understand Deployments and how to perform rolling updates - Use the Helm package manager to deploy existing packages |
| Topic 4: Services and Networking | 20% | - Provide and troubleshoot access to applications via services - Demonstrate basic understanding of NetworkPolicies - Use Ingress rules to expose applications |
| Topic 5: Application Environment, Configuration and Security | 25% | - Understand authentication, authorization and admission control - SecurityContexts - Understanding and defining resource requirements, limits and quotas - ServiceAccounts - ConfigMaps and Secrets - Discover and use resources that extend Kubernetes (CRD, Operators) |
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NEW QUESTION # 44
You are running a Kubernetes cluster with a limited number of nodes, and you want to deploy a new application that requires a lot of resources. You are concerned about potential resource contention and performance issues with other existing applications. How would you use resource quotas to manage resource usage and prevent potential issues?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Resource Quota:
- Create a new YAML file (e.g., 'resource-quota.yaml') to define your resource quota.
- Specify the name of the resource quota and the namespace where it will be applied.
- Define the resource limits for the quota. For instance, you can set limits for CPU, memory, pods, services, etc.
2. Apply the Resource Quota: - Apply the resource quota to your cluster using the following command: bash kubectl apply -f resource-quota.yaml 3. Verify the Resource Quota: - Use the "kubectl get resourcequota' command to list the applied resource quotas and confirm their status. 4. Deploy Applications with Resource Requests: - When deploying your applications, ensure that you specify resource requests and limits in your Deployment YAML files. - This will help enforce the resource limits defined by your quota.
5. Monitor Resource Usage: - Use monitoring tools (e.g., Prometheus, Grafana) to track resource usage in your namespace and ensure that applications are staying within the resource limits defined by your quota.
NEW QUESTION # 45
You have a Kubernetes cluster with a Deployment named 'wordpress-deployment running 3 replicas of a WordPress container. You want to expose this deployment as a service and ensure that the service only forwards traffic to the pods With the label 'version: v?. You need to create a service with the following requirements:
- The service name should be swordpress-service'
- The service should be of type 'Load8alancer' for external access.
- The service should only target pods with the label 'version: v?
- The service should expose port 80 on tne service, wmch maps to port 8080 in the WordPress container.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Service:
- Create a YAML file named 'wordpress-service.yamr with the following content:
2. Apply the Service: - Apply the YAML file to your cluster using 'kubectl apply -f wordpress-service.yamr 3. Verify the Service: - Check the service status using 'kubectl get services wordpress-service'. This should show that the service is created with type 'LoadBalancers and an external IP address is assigned to it. 4. Access WordPress: - Once the service is running, you can access your WordPress application by navigating to the external IP address assigned to the 'wordpress- service' in your browser.
NEW QUESTION # 46 
Task
You are required to create a pod that requests a certain amount of CPU and memory, so it gets scheduled to-a node that has those resources available.
* Create a pod named nginx-resources in the pod-resources namespace that requests a minimum of 200m CPU and 1Gi memory for its container
* The pod should use the nginx image
* The pod-resources namespace has already been created
Answer:
Explanation:
See the solution below.
Explanation
Solution:
NEW QUESTION # 47
You are developing a service that uses a custom configuration file called 'service.properties'. You want to use ConfigMaps to store and manage this file in a secure and efficient manner. The 'service-properties' file contains sensitive information such as database credentials and API keys.
How would you create a ConfigMap that securely stores the 'service-properties' file, ensuring that the file is accessible only to the service's container?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Secret for Sensitive Data:
- Create a Secret
- Encode the 'service-properties' file: bash echo "your-database-username=your-database-username" > service-properties echo "your-database-password=your-database-password" >> service-properties echo 'Your-api-key=your-api-key" >> service.properties base64 -w 0 service.properties - Replace with the output from the base64 command. 2. Create the ConfigMap for the File:
3. Apply the Secret and ConfigMap: bash kubectl apply -f service-secrets-yaml kubectl apply -f service-config.yaml 4. Update the Deployment to use the ConfigMap and Secret
5. Apply the updated Deployment: bash kubectl apply -f my-service-deployment-yaml 6. Access the File in the Container. - Mount the ConfigMap and Secret: - The ConfigMap mounts the 'service.properties' file as a placeholder. - The Secret mounts the actual 'service.properties' file securely. - Access the File: - The container should access the 'service.properties' file from '/var/secrets/service/service.properties' This approach uses a Secret to store sensitive data and a ConfigMap to mount the file securely within the container. The container will have access to the 'service-properties' file, but the actual data is stored in the Secret, ensuring its confidentiality'.
NEW QUESTION # 48
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 # 49
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