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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Design and Build | 20% | - Utilize persistent and ephemeral volumes - Choose and use appropriate workload resources - Understand multi-container Pod design patterns - Define, build and modify container images |
| Topic 2: Application Observability and Maintenance | 15% | - Work with container logs - Implement probes and health checks - Understand API deprecations - Debug applications in Kubernetes - Monitor applications using CLI tools |
| Topic 3: Application Environment, Configuration and Security | 25% | - Create and consume Secrets - Configure resource requirements, limits and quotas - Apply application security settings - Work with ConfigMaps - Use ServiceAccounts - Understand authentication, authorization and admission control - Use custom resources and extensions |
| Topic 4: Services and Networking | 20% | - Expose applications via Services - Understand and apply NetworkPolicies - Use Ingress rules - Troubleshoot network access |
| Topic 5: Application Deployment | 20% | - Manage Deployments, rolling updates and rollbacks - Use Helm package manager - Implement deployment strategies - Work with Kustomize |
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NEW QUESTION # 213 
Task
A Deployment named backend-deployment in namespace staging runs a web application on port 8081.
Answer:
Explanation:
See the solution below.
Explanation:
Solution:
NEW QUESTION # 214
Context
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
Answer:
Explanation:
Solution:
NEW QUESTION # 215
You are running a microservices application on Kubernetes, and you need to restrict the communication between your services to specific ports. For example, your 'frontend' service should only be allowed to communicate with the 'backend' service on port 8080. How would you configure this using NetworkPolicy in Kubernetes?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the NetworkPolicy:
- Create a new YAML file (e.g., 'frontend-network-policy.yaml') to define the network policy.
- Specify the name of the NetworkPolicy and the namespace where it will be applied.
- Include the following elements within the 'spec' section:
- 'podSelector' to target the 'frontend' pods.
- 'ingress' section to define inbound traffic rules.
- 'egress' section to define outbound traffic rules.
2. Apply the NetworkPolicy: - Apply the NetworkPolicy to your cluster using the following command: bash kubectl apply -f frontend-network-policy.yaml 3. Verify the NetworkPolicy: - Use the 'kubectl get networkpolicy' command to list the applied NetworkPolicies and confirm the status. 4. Test the Restrictions: - From a 'frontend' pod, attempt to connect to the 'backend' service on port 8080. - Attempt to connect to other services or ports on the backend or external networks. - Verify that the communication restrictions defined in the NetworkPolicy are working as expected.
NEW QUESTION # 216
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 # 217
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 # 218
......
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