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| Section | Weight | Objectives |
|---|---|---|
| Application Observability and Maintenance | 15% | - Implement probes and health checks - Debugging in Kubernetes - Understand API deprecation policies - Use built-in CLI tools to monitor Kubernetes applications - Utilize container logs |
| Application Deployment | 20% | - Kustomize - Understand Deployments and how to perform rolling updates - Use the Helm package manager to deploy existing packages - Use Kubernetes primitives to implement common deployment strategies (e.g., blue/green or canary) |
| Services and Networking | 20% | - Demonstrate basic understanding of NetworkPolicies - Use Ingress rules to expose applications - Provide and troubleshoot access to applications via services |
| Application Environment, Configuration and Security | 25% | - Understanding and defining resource requirements, limits and quotas - ConfigMaps and Secrets - SecurityContexts - ServiceAccounts - Discover and use resources that extend Kubernetes (CRD, Operators) - Understand authentication, authorization and admission control |
| Application Design and Build | 20% | - Utilize persistent and ephemeral volumes - Choose and use the right workload resource (Deployment, DaemonSet, CronJob, etc.) - Define, build and modify container images - Understand multi-container Pod design patterns (e.g., sidecar, init and others) |
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NEW QUESTION # 23
You have a Deployment named 'my-app-deployment running a Flask application. You want to add a liveness probe that checks if the Flask application is responding on port '5000' and a readiness probe that checks if the application is ready to receive requests. Implement these probes using Kustomize.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a base Deployment configuration:
2. Create a 'kustomization.yamr file:
3. Create 'patcnes/liveness-probe.yaml':
4. Create 'patches/readiness-probe-yaml':
5. Apply the Kustomize configuration: bash kustomize . I kubectl apply -t- - Liveness probe: This probe checks if the application is still alive and running. It uses a TCP socket to connect to port ' 5000' and waits for 15 seconds before making the first cneck. It checks every 20 seconds, and if it fails 3 times in a row, the pod is restarted. - Readiness probe: This probe checks if the application is ready to receive requests. It also uses a TCP socket to connect to port '5000'. It checks every 10 seconds and waits for 5 seconds before the first check. If it fails 2 times in a row, the pod is marked as unhealthy and excluded trom receiving traffic. Note: Make sure your Flask application is actually listening on port '5000' and responding to requests. ,
NEW QUESTION # 24
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 # 25
Exhibit:
Context
It is always useful to look at the resources your applications are consuming in a cluster.
Task
* From the pods running in namespace cpu-stress , write the name only of the pod that is consuming the most CPU to file /opt/KDOBG030l/pod.txt, which has already been created.
Answer: A
NEW QUESTION # 26
You are running a multi-tier application in Kubernetes. Your application consists of a frontend service (nginx) and a backend service (app). The frontend service exposes a port to the outside world, while the backend service listens on a different port. The backend service needs to access a database service running on a different node.
You need to create a network policy that allows the nginx service to access the app service, and the app service to access the database service. Ensure tnat no otner traffic is allowed between pods in the cluster.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Network Policy for Nginx Service:
- Create a NetworkPoliCY named 'nginx-policy' that allows traffic from pods labeled 'app=nginx' to pods labeled Sapp-apps
- Use 'ingress' rules to define incoming traffic to the nginx service-
- Specify the for the nginx service.
- Allow all ports.
2. Define Network Policy for App Service: - Create a NetworkP01iCY named 'app-policy' that allows traffic from pods labeled 'app=app' to pods labeled 'app=database' - Use 'ingress' rules to define incoming traffic to the app service. - Specify the 'podSeIector' for the app service. - Allow traffic on the port that the database service listens on.
3. Create the NetworkPolicy Objects - Apply the NetworkP01iCies using the 'kubectl apply' command: bash kubectl apply -f nginx-policy.yaml kubectl apply -f app-policy.yaml 4. Apply Default Network Policy: - Create a NetworkPoliCY named 'default-policy' that blocks all traffic by default. - This ensures that only traffic allowed by the specific policies is permitted.
5. Apply Default Network Policy: - Apply the NetworkPoliCY using the 'kubectl apply' command: bash kubectl apply -f default-policy_yaml This configuration ensures that: - Nginx Service: Can access the 'app' service on port 80, and no other traffic is allowed in or out. - App Service: Can access the 'database' service on port 5432, and no other traffic is allowed in or out - All Other Pods: All other pods in the cluster are blocked from communicating with each other by the default network policy.,
NEW QUESTION # 27
You are running a web application in a Kubernetes cluster. You have a deployment named 'web- app' with two replicas. You need to implement a Network Policy that allows only traffic from pods with the label app: database' to access the 'web-app' deployment on port 8080. You also need to block all other traffic to the 'web-app' deployment.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Network Policy:
- Create a YAML file named 'web-app-network-policy.yamr with the following content:
2. Apply the Network Policy: - Apply the Network Policy to your cluster: bash kubectl apply -f web-app-network-policy.yaml 3. Verify the Network Policy: - Verify that the Network Policy has been applied correctly by listing the Network Policies in your namespace: bash kubectl get networkpolicies -n default # Replace with your namespace You should see the 'web-app-network-policy' listed. 4. Test the Network Policy: - From a pod with the label 'app: database' , try to access the 'web-app' deployment on port 8080. This should be successful. - From any other pod, try to access the 'web-app' deployment on port 8080. This should be blocked. - The 'podSelector' in the Network Policy specifies that it applies to pods with the label 'app: web-app'. - The 'ingress' section defines the allowed incoming traffic. In this case, it allows traffic from pods with the label 'app: database' on port 8080. - The 'egress' section defines the allowed outgoing traffic. In this case, it allows all outgoing traffic except on port 8080. This ensures that only pods with the 'app: database' label can access the 'web-ap$ deployment on port 8080. Note: - You may need to update the 'namespace' in the Network Policy YAML file to match the namespace where your 'web-app' deployment is running. - Make sure that pods with the label 'app: database' are allowed to access the 'web-app' deployment by other means, such as Service or Ingress, if needed.,
NEW QUESTION # 28
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