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Linux Foundation CKAD（Linux Foundation 認證 Kubernetes 應用程序開發人員）認證考試是一項高度認可的認證計劃，旨在測試與 Kubernetes 合作的開發人員的技能和知識。這項認證考試旨在驗證候選人對 Kubernetes 架構、Kubernetes 應用程序的部署和故障排除的理解。該考試旨在評估候選人部署、配置和管理 Kubernetes 應用程序的能力，以及開發和部署高效可擴展的 Kubernetes 應用程序的能力。

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>> CKAD證照信息 <<

最新CKAD考題 - CKAD認證考試解析

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最新的 Kubernetes Application Developer CKAD 免費考試真題 (Q196-Q201):

問題 #196
You have a Deployment named 'wordpress-deployment' that runs 3 replicas of a Wordpress container with the image 'wordpress:latest You need to ensure that wnen a new image is pusned to the Docker Hub repository 'my-wordpress-repo/wordpressaatest' , tne Deployment automatically updates to use the new image. Additionally, you need to set up a rolling update strategy where only one pod is updated at a time- The maximum number of unavailable pods at any given time should be 1.

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 'imagePuIIPoIicy: Always' to the container definition to ensure the deployment pulls the latest image from the Docker Hub repository even if a local copy exists.
- Set 'strategy-type: Rollingupdate' to enable a rolling update strategy.
- Configure 'strategy.rollingupdate.maxonavailable: I ' to allow only one pod to be unavailable during the update process.
- Set 'strategy-rollingUpdate.maxSurge: O' to restrict the number of pods added during the update to zero.

問題 #197
You are building a Kubernetes application that involves a microservice architecture with multiple pods for each service. One of your services requires a sidecar container to handle logging and monitoring. How would you design the pod structure and define the relationships between the application container and the sidecar container?

答案：

解題說明：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Pod Specification:
- Create a pod definition file (e.g., 'pod.yaml').
- Include the 'apiVersion', 'kind', 'metadata' (name, labels), and 'spec' sections.
2. Define Application Container:
- Within the 'spec.containerS section, define the primary application container:
- 'name': Provide a descriptive name for the application container (e.g., 'app').
- Simage: Specify the Docker image for the application.
- 'ports': Define any ports that the application exposes.
- 'resources': (Optional) Specify resource requests and limits for the application container.
3. Define Sidecar Container.
- Add another container definition within the 'spec-containers' section for the sidecar:
- 'name': Provide a name for the sidecar container (e.g., Slogger').
- 'image': Specify the Docker image for the sidecar container (e.g., "busybox'
- 'command': Define the command to run within the sidecar. This might involve using a logging agent, monitoring tool, or any other custom script.
- 'volumeMountss: (Optional) If the sidecar needs access to shared data, mount volumes here.
4. Define Shared Volumes (Optional):
- If necessary, create a 'spec-volumes' section to define any shared volumes that both containers can access. This might include:
- 'emptyDir': For temporary data that only exists within the pod.
- 'persistentVolumeClaim': To use a persistent volume claim for shared data that persists beyond pod restarts.
5. Configure Container Relationships:
- Ensure that the 'name' of the application container and sidecar container is the same as the 'name' used in the 'volumeMounts' section.
Example YAML:

- The pod named 'my-app-pod' includes two containers: 'app' (the primary application) and 'logger' (the sidecar). - The 'loggers container uses a 'command' to simulate logging activity. - Both containers can access the 'logs' volume, which is an empty directory. Important Note: - The sidecar container should ideally be configured to interact with the application container. This might involve using shared volumes, environment variables, or inter-process communication mecnanisms to facilitate data exchange or Signal passing. - Remember to adapt the example to your specific application requirements, choosing the appropriate container images, commands, and volumes.]

問題 #198
You have a Kubernetes cluster with a Deployment that runs a critical web application. The application's codebase is in a Git repository, and you want to automatically deploy a new version of the application whenever a new commit is pushed to the 'master branch ot the repository. You need to ensure that the deployment process iS seamless and doesn't result in downtime for the web application.

答案：

解題說明：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
I). Set up a Git repository:
- Create a Git repository on a platform like GitHub, GitLab, or Bitbucket.
- Store your web application's code in this repository
2. Configure a webhook:
- Go to the settings of your Git repository and configure a webhook.
- The webhook URL should point to your Kubernetes clusters API server.
- Set the webhook event to 'push' and the branch to 'master
3. Create a Deployment
- Create a Deployment YAML file with the following configuration:

4. Create a Kubernetes Secret: - Store your Git repository's credentials in a Kubemetes secret - This secret will be used to authenticate the webhook request from your Git repository. 5. Create a Job: - Create a Job YAML file with the following configuration:

6. Apply the resources: - Apply the Deployment, Secret, and Job YAML files to your Kubernetes cluster 7. Test the deployment: - Push a new commit to the 'master' branch of your Git repository. - Observe that the Job runs and updates the Deployment with the new image. - VeriSi that the web application is still accessible during the update process.

問題 #199
You have a Kubernetes deployment named 'wordpress-deployment' running multiple instances of a WordPress application. You want to implement a rolling update strategy with a 'maxSurge' of 1 and 'maxi-Jnavailable' of O. Additionally, you need to ensure that the update process is automatically triggered when a new image is pushed to the Docker Hub repository 'wordpress-image:latests. Implement a Kustomization file to achieve this.

答案：

解題說明：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a 'kustomization.yamr file in your desired directory.

2. Create a 'deployment-yamr file (or use an existing one) with the following structure.

3. Create a 'patch.yamr file with the following content to configure rolling update and automatic updates:

4. Apply the Kustomization: bash kubectl apply -k - The 'kustomization.yaml file defines the resources (the 'deployment.yamr file) and the patches to apply. - The 'deployment.yamr file contains the base configuration for the deployment. - The 'patch.yamr file applies a strategic merge patch to the deployment, configuring rolling updates and automatic updates triggered by new images. - The 'maxSurgew and 'maxunavailable' settings in the 'patch.yamr define the maximum number ot pods that can be added or removed during the update process. - The 'imagePullPolicy: AlwayS ensures that the new image is pulled from Docker Hub even if it exists in the pod's local cache, triggering the update.

問題 #200

Task:
A Dockerfile has been prepared at -/human-stork/build/Dockerfile
1) Using the prepared Dockerfile, build a container image with the name macque and lag 3.0. You may install and use the tool of your choice.

2) Using the tool of your choice export the built container image in OC-format and store it at -/human stork
/macque 3.0 tar

答案：

解題說明：
See the solution below.
Explanation:
Solution:

問題 #201
......

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