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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Observability and Maintenance | 15% | - Use built-in CLI tools to monitor Kubernetes applications - Understand API deprecation policies - Utilize container logs - Implement probes and health checks - Debugging in Kubernetes |
| Topic 2: Services and Networking | 20% | - Use Ingress rules to expose applications - Provide and troubleshoot access to applications via services - Demonstrate basic understanding of NetworkPolicies |
| Topic 3: Application Environment, Configuration and Security | 25% | - Discover and use resources that extend Kubernetes (CRD, Operators) - Understand authentication, authorization and admission control - ServiceAccounts - SecurityContexts - Understanding and defining resource requirements, limits and quotas - ConfigMaps and Secrets |
| Topic 4: 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) - Utilize persistent and ephemeral volumes - Define, build and modify container images |
| Topic 5: Application Deployment | 20% | - Use Kubernetes primitives to implement common deployment strategies (e.g., blue/green or canary) - Use the Helm package manager to deploy existing packages - Kustomize - Understand Deployments and how to perform rolling updates |
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NEW QUESTION # 128
You are working on a Kubernetes application that requires a scheduled job to run a data processing script every day at midnight. The script takes approximately 30 minutes to complete and requires access to a persistent volume to store its output dat a. How would you create a Job resource that meets these requirements?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
I). Create a Persistent Volume Claim:
- Define a Persistent Volume Claim (PVC) to request the necessary storage space.
- Specify the access mode and storage class according to your cluster configuration.
2. Define the Job Resource: - Create a Job resource With a 'cronJob' schedule to trigger the execution at midnight every day. - Specify the 'backoffLimit' to control the number of retries in case of failures. - Define the 'spec-template.spec.containers' section for the container running the data processing script. - Mount the PVC to the container using 'volumeMounts'.
3. Create the Job: - Apply the Job YAML file using 'kubectl apply -f data-processing-job.yamr 4. Verify Job Execution: - Use 'kubectl get jobS to monitor the status of the Job. - Check the 'status. completionTime' to verify that the Job completed successfully. - Verity that the output data is stored in the mounted persistent volume. 5. Update the Script - Update the 'your-data-processing-script.sh" with the necessary commands to process the data and store the output in the "ldata' directory. 6. Monitor the Job: - Continuously monitor the Job's status and logs using 'kubectl logs' to ensure it runs correctly. Note: Replace 'your-image-namelatest and 'your-data-processing-scriptsh' with the actual image name and script file respectively,
NEW QUESTION # 129
Refer to Exhibit.
Context
Developers occasionally need to submit pods that run periodically.
Task
Follow the steps below to create a pod that will start at a predetermined time and]which runs to completion only once each time it is started:
* Create a YAML formatted Kubernetes manifest /opt/KDPD00301/periodic.yaml that runs the following shell command: date in a single busybox container. The command should run every minute and must complete within 22 seconds or be terminated oy Kubernetes. The Cronjob namp and container name should both be hello
* Create the resource in the above manifest and verify that the job executes successfully at least once
Answer:
Explanation:
Solution:
NEW QUESTION # 130
You have a container image for a web application that uses a specific version of a Java library_ You want to update this library to a newer version, but you are concerned about potential compatibility issues. Describe the steps involved in modifying the container image to include both the old and new versions of the library, allowing you to selectively use either version based on your needs.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Dockerfile:
- Create a new 'Dockerfile' with the following content
- Replace 'your-java-library' with the actual Java library name. - Replace 'new-version' and 'old-version' with the desired versions. - Adjust the 'apt-get' commands to match the package manager of your chosen base image. 2. Build the Image: - Build the image using tne Dockefflle: docker build -t updated-image:latest 3. Modify your application code: - Modify your Java code to explicitly use the desired version of the library. You can achieve this by: - Setting a System Property: Pass the desired version as a system property to the JVM, and your application can then read and use it. - Using the Classpath: Add the specific jar file for the desired version to the classpath at runtime. - Conditional Loading: Implement logic in your code to determine which version to use based on specific conditions or user input. 4. Update the Deployment: - Modify your Deployment YAML file to use the newly built image:
5. Apply the Changes: - Apply the updated Deployment using ' kubectl apply -f deployment_yamr 6. Test the Application: - Access your application and ensure it functions correctly with both versions of the library. You should be able to test both versions of the library and switch between them based on your requirements.,
NEW QUESTION # 131
Refer to Exhibit.
Task
Create a new deployment for running.nginx with the following parameters;
* Run the deployment in the kdpd00201 namespace. The namespace has already been created
* Name the deployment frontend and configure with 4 replicas
* Configure the pod with a container image of lfccncf/nginx:1.13.7
* Set an environment variable of NGINX__PORT=8080 and also expose that port for the container above
Answer:
Explanation:
Solution:
NEW QUESTION # 132
Context
Context
As a Kubernetes application developer you will often find yourself needing to update a running application.
Task
Please complete the following:
* Update the app deployment in the kdpd00202 namespace with a maxSurge of 5% and a maxUnavailable of 2%
* Perform a rolling update of the web1 deployment, changing the Ifccncf/ngmx image version to 1.13
* Roll back the app deployment to the previous version
Answer:
Explanation:
Solution:
NEW QUESTION # 133
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