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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Observability and Maintenance | 15% | - Use built-in CLI tools to monitor Kubernetes applications - Implement probes and health checks - Understand API deprecation policies - Utilize container logs - Debugging in Kubernetes |
| Topic 2: Services and Networking | 20% | - Use Ingress rules to expose applications - Demonstrate basic understanding of NetworkPolicies - Provide and troubleshoot access to applications via services |
| Topic 3: Application Deployment | 20% | - Use Kubernetes primitives to implement common deployment strategies (e.g., blue/green or canary) - Understand Deployments and how to perform rolling updates - Use the Helm package manager to deploy existing packages - Kustomize |
| 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 Environment, Configuration and Security | 25% | - Discover and use resources that extend Kubernetes (CRD, Operators) - ConfigMaps and Secrets - Understand authentication, authorization and admission control - Understanding and defining resource requirements, limits and quotas - SecurityContexts - ServiceAccounts |
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NEW QUESTION # 144
You are building a microservice called 'order-service' that handles order processing. You need to configure a Securitycontext for the 'order-service' container tnat ensures it can access the network to communicate With other services and access specific hostPath volumes, but it should not have root privileges.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the Securitycontext:
- Create a 'securityContext' section within the 'spec.template.spec.containers' block for your 'order-service' container.
- Set 'runAslJser' to a non-root IJID (e.g., 1001) to prevent running as the root user-
- Set 'allowPrivilegeEscalation' to 'false' to prevent the container from escalating its privileges.
- Set 'capabilities' to an empty array (so') to disable any additional capabilities.
2. Mount HostPath Volumes: - Define 'volumeMountS for the required hostPath volumes. - Specify the mount path within the container C Idata' and 'Iconfig' in this example) and the volume name. - Define corresponding 'volumes with the 'hostPath' type, specifying the source path on the host and the volume name. 3. Create the Deployment: - Apply the Deployment YAML file using 'kubectl apply -f order-service-deployment-yaml' - The 'securitycontext' restricts the container's access to the host system's resources and prevents privilege escalation. - Setting 'runAsUserS to a non-root I-IID ensures that tne container runs as a non-root user - 'allowPriviIegeEscalation' prevents the container from elevating its privileges, even if it has the necessary capabilities. - The 'capabilities' section allows you to explicitly detine WhiCh capabilities the container snould nave. In this case, an empty array disables all additional capabilities, restricting the container's potential actions. - The 'volumeMounts' define how hostPath volumes are mounted within the container, providing access to specific directories on the host system. This configuration ensures that the 'order-service' container can access specific hostPath volumes and the network for communication with other services without running as root and without any additional capabilities, enhancing security.
NEW QUESTION # 145
Context
Task:
1- Update the Propertunel scaling configuration of the Deployment web1 in the ckad00015 namespace setting maxSurge to 2 and maxUnavailable to 59
2- Update the web1 Deployment to use version tag 1.13.7 for the Ifconf/nginx container image.
3- Perform a rollback of the web1 Deployment to its previous version
Answer:
Explanation:
Solution:
NEW QUESTION # 146
You are developing a microservices application consisting of several deployments. One of the deployments, named 'order-service- deployments , is responsible for processing orders. Each order requires a specific backend service to process the order. You need to design a mechanism that automatically assigns an appropriate backend service to each order processing pod based on the order type. For example, orders for "books" should be assigned to the 'book-service' backend, while orders for "electronics" should be assigned to the 'electronics-service backend. Explain how you would implement this dynamic backend service assignment mechanism.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
This scenario requires a mecnanism to dynamically assign a backend service to each order processing pod based on the order type. Here's how you can implement this:
1. Label the Backend Services:
- Label the backend services based on the order type they handle. For instance:
- 'book-service': 'order.type=books'
- 'electronics-service: 'order.type=electronics'
2. I-Ise a ConfigMap:
- Create a ConfigMap named 'order-backend-mapping' that stores the mapping between order types and backend service labels.
- Use the ConfigMap to dynamically assign backend services based on the order type.
3. Modify the Order Service Deployment: - In the 'order-service-deployment , add an init container that retrieves the backend service mapping from the ConfigMap. - Use this mapping to determine the appropriate backend service for each order. - The init container can inject environment variables or modify the pod's annotations based on the mapping.
4. Update the Order Service: - Ensure the 'order-service' container is configured to use the environment variable set by the init container to access the correct backend service. 5. Deploy the Changes: - Apply the updated ConfigMap and Deployment using 'kubectl apply' 6. Test the Dynamic Assignment: - Create orders of different types and verity that the 'order-service' pods are automatically assigned the correct backend services. ,
NEW QUESTION # 147
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: A
NEW QUESTION # 148
You are developing a new feature for your application that requires a new microservice to be deployed. This microservice interacts With a database, and you want to ensure the database connection is handled securely and efficiently. Design a deployment strategy for the new microservice that integrates with the database and implements security best practices.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Use a Deployment:
- Deploy your new microservice using a Deployment Deployments provide a robust mechanism for managing and scaling your microservices, making it easy to update and manage your application.
2. Secure Database Credentials: - Store database credentials in a Kubernetes Secret, which is encrypted at rest. This ensures that the credentials are not exposed in plain text in your deployments.
3. Configure Database Connection Details: - Define environment variables Within your Deployment to pass database connection details (like host, port, username, and password) to the container- 4. Use ConfigMaps for Configuration: - Utilize ConfigMaps to manage database connection settings (like connection strings or configuration files) that are common across multiple pods. This makes it easier to update configuration details without modifying your deployments directly.
5. Implement Database Connection Pooling. - Use a database connection pool to manage connections efficiently, reducing the overhead of establishing and closing connections frequently. 6. Consider Using Database-as-a-Service (DBaaS): - If your application is running in a cloud environment, consider leveraging a DBaaS service like Amazon RDS, Google Cloud SQL, or Azure SQL Database. DBaaS services provide managed database infrastructure, simplifying database management, scaling, and security. T Implement Database Security Practices: - Configure database security measures like access control lists (ACLs), encryption at rest, and audit logging to ensure data security
NEW QUESTION # 149
......
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