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| Section | Weight | Objectives |
|---|---|---|
| Application Environment, Configuration and Security | 25% | - Configure resource requirements, limits and quotas - Create and consume Secrets - Work with ConfigMaps - Use custom resources and extensions - Use ServiceAccounts - Understand authentication, authorization and admission control - Apply application security settings |
| Services and Networking | 20% | - Expose applications via Services - Troubleshoot network access - Understand and apply NetworkPolicies - Use Ingress rules |
| Application Deployment | 20% | - Work with Kustomize - Use Helm package manager - Implement deployment strategies - Manage Deployments, rolling updates and rollbacks |
| Application Observability and Maintenance | 15% | - Monitor applications using CLI tools - Understand API deprecations - Implement probes and health checks - Work with container logs - Debug applications in Kubernetes |
| Application Design and Build | 20% | - Choose and use appropriate workload resources - Define, build and modify container images - Utilize persistent and ephemeral volumes - Understand multi-container Pod design patterns |
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問題 #125
You have a Deployment named 'wordpress-deployment' that runs 3 replicas of a Wordpress container. You need to set up resource requests and limits for CPU and memory for each pod. The application requires a minimum of 250m CPU and 512Mi memory, but it should not exceed 500m CPU and IGi memory. Furthermore, implement a resource quota for the swordpress' namespace to ensure that the total CPU requests and limits do not exceed 2 CPIJ and 4Gi memory, respectively.
答案：
解題說明：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAML:
- Add 'resources' to the 'containers' section, setting 'requests' and 'limits' for both CPIJ and memory.
- The 'requests' should be set to the minimum required resources, and 'limits' to the maximum allowed.
2. Create the Deployment: - Apply the updated YAML file using 'kubectl apply -f wordpress-deployment-yamr 3. Create a Resource Quota: - Create a ResourceQuota YAML file named 'wordpress-quota.yaml' with the following contents:
4. Apply the Resource Quota: - Apply the ResourceQuota YAML file using 'kubectl apply -f wordpress-quota.yamr. 5. Verify the Deployment and Quota: - Check the status of the Deployment using 'kubectl get deployments wordpress-deployment' to confirm the updated resource requests and limits. - Use ' kubectl get resourcequotas -n wordpresS to verify the applied resource quota and its remaining limits- 6. Test Resource Limits: - Try to create a new Deployment or Pod in the 'wordpress' namespace that exceeds the resource quota limits. This should result in an error, ensuring the quota is enforced.
問題 #126
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?
答案：
解題說明：
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.
問題 #127
You are running a web application within a Kubernetes cluster. The application consists of two pods, each with a resource request of 1CPU core and I GiB of memory. However, you've noticed that the application experiences performance issues during peak traffic hours. To mitigate these issues, you decide to implement resource quotas tor the namespace where the application runs. You want to ensure that the application pods receive adequate resources while preventing other applications from consuming excessive resources. Design and implement a resource quota for the namespace that sets limits for CPU and memory resources.
答案：
解題說明：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the Resource Quota:
- Create a YAML file (e.g., resource-quota.yaml') containing the following resource quota configuration:
2. Apply the Resource Quota: - Apply the resource quota to the 'web-app' namespace using the following command: bash kubectl apply -f resource-quota-yaml 3. Verify the Resource Quota: - Check the status of the resource quota using the following command: bash kubectl get resourcequotas -n web-app You should see the 'web-app-quota' listed with its defined limits and requests. 4. Monitor Resource Usage: - Use the 'kubectl describe resourcequota web-app-quota -n web-apps command to monitor the current resource usage within the 'web-apps namespace- This will show you the consumed resources against the defined limits. 5. Adjust the Resource Quota: - If the resource quota is too restrictive or not restrictive enough, you can adjust the values in the 'requests' and 'limits' fields in the 'resource. quota.yaml file and reapply the resource quota using 'kubectl apply'. - The resource quota limits the total amount of resources (CPU and memory) that can be consumed by all pods in the 'web-app' namespace. - The requests' field specifies the total amount of resources that pods in the namespace can request. - The 'limits' field sets a hard limit on the total amount of resources that pods can use, preventing them from exceeding these limits. - This ensures that the web application has access to the required resources while preventing other applications in the namespace from consuming all available resources. ,
問題 #128
You are deploying a new application named 'analytics-platform' that requires 12 replicas. You want to implement a rolling update strategy that allows for a maximum ot three pods to be unavailable at any given time. However, you need to ensure that the update process iS triggered automatically whenever a new image is pushed to the Docker Hub repository 'analytics/analytics-platform:latest'.
答案：
解題說明：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Llpdate the Deployment YAMLI
- Update the 'replicas' to 12.
- Define 'maxiJnavailable: 3' and 'maxSurge: in the 'strategy-rollingupdate' sectiom
- Configure a 'strategy.type' to 'RollinglJPdates to trigger a rolling update wnen 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 analytics-platform-deployment.yamr 3. Verify the Deployment - Check the status of the deployment using 'kubectl get deployments analytics-platform-deployment' to confirm the rollout and updated replica count. 4. Trigger the Automatic Update: - Push a new image to the 'analytics/analytics-platform:latest Docker Hub repository 5. Monitor the Deployment - Use 'kubectl get pods -l app=analytics-platform' to monitor the pod updates during the rolling update process. You will observe that three 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 analytics-platform-deployment to see that the 'updatedReplicas' field matches the 'replicas' field, indicating a successful update.,
問題 #129
Context
Context
Your application's namespace requires a specific service account to be used.
Task
Update the app-a deployment in the production namespace to run as the restrictedservice service account. The service account has already been created.
答案：
解題說明：
Solution:
問題 #130
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從Google Drive中免費下載最新的PDFExamDumps CKAD PDF版考試題庫：https://drive.google.com/open?id=1zz4bjmcVMAi_I61P1iFK1I14RimOG7Hj