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| Section | Weight | Objectives |
|---|---|---|
| Application Deployment | 20% | - Use the Helm package manager to deploy existing packages - Use Kubernetes primitives to implement common deployment strategies (e.g., blue/green or canary) - Kustomize - Understand Deployments and how to perform rolling updates |
| Application Environment, Configuration and Security | 25% | - SecurityContexts - Understand authentication, authorization and admission control - ConfigMaps and Secrets - Discover and use resources that extend Kubernetes (CRD, Operators) - ServiceAccounts - Understanding and defining resource requirements, limits and quotas |
| Application Design and Build | 20% | - Define, build and modify container images - Choose and use the right workload resource (Deployment, DaemonSet, CronJob, etc.) - Utilize persistent and ephemeral volumes - Understand multi-container Pod design patterns (e.g., sidecar, init and others) |
| Application Observability and Maintenance | 15% | - Debugging in Kubernetes - Utilize container logs - Understand API deprecation policies - Implement probes and health checks - Use built-in CLI tools to monitor Kubernetes applications |
| Services and Networking | 20% | - Demonstrate basic understanding of NetworkPolicies - Provide and troubleshoot access to applications via services - Use Ingress rules to expose applications |
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NEW QUESTION # 198
You are building a microservices application on Kubernetes, where two services, and 'service-b' , need to communicate with each other securely. 'Service-b' needs to expose a secure endpoint that is only accessible by 'service-a'. Describe how you would implement this using Kubernetes resources, including the configuration for the 'service-b' endpoint.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define a Kubernetes Secret:
- Create a Kubernetes secret to store the certificate and key pair for 'service-W. This secret will be used to secure the communication.
- Example:
2. Configure 'service-b' Deployment: - Define a Deployment for 'service-b' , specifying a container that uses the secret for TLS. - Ensure that the container has the required dependencies and configuration to use TLS. - Example:
3. Define a Kubernetes Service for 'service-b'.' - Create a Service for 'service-b' that exposes the secure endpoint on a specific port (e.g., 8443) and uses the LoadBalancer' type for external access. - Use the 'targetPort' field to specify the container port that 'service-b' is listening on. - Example:
4. Configure 'service-a' Deployment: - Define a Deployment for 'service-a', specifying a container that uses the secret for TLS when connecting to service-W. - Example:
5. Update 'service-a' Container Configuration: - Within the 'service-a' container, ensure the application is configured to use the certificate and key from the mounted volume ('Ivar/tls/') for secure communication with 'service-b'. 6. Verify Secure Communication: - Use 'kubectl get pods' to check the status of both 'service-a' and 'service-W pods. - Test the communication between 'service-a' and 'service-b' by sending requests from the 'service-a' pod to the secure endpoint of 'service-b'. - Verify that the communication is secure and that 'service-a' can successfully access the endpoint. Notes: - You may need to adjust the port numbers and image names in the examples to match your specific setup. - Make sure you have the certificate and key in the correct format and base64 encoded before creating the Secret. - You can also use other methods like a Service Account and Role-Based Access Control (RBAC) to restrict access to the secure endpoint, if needed. - This is a simplified example and additional security measures may be required based on your application's requirements. ,
NEW QUESTION # 199
You have a Kustomization file that applies a patch to the 'spec-template-spec-containers-image' field of a Deployment However, you are now using a newer version of Kubernetes and have received warnings about the deprecated 'spec.template.spec' path. How can you update the Kustomization file to use the recommended API path, ensuring the patch still applies correctly?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Identify the Deprecated Path: The original Kustomization file likely has a patch like this:
Where 'patch.yamr contains:
2. IJpdate the Patch Path: Replace the deprecated path with the recommended one: Vspec/template/spec.containers/0/image' -> /spec/template.container/0/images
3. Apply the IJpdated Kustomizatiom Re-apply the Kustomization file With the updated patch. 4. Verify the Patch: Verify that the updated Deployment now uses the new image by checking the 'spec-template.spec.contajners.image' field. This example demonstrates updating a Kustomization file to use the correct API path for a patch. It is important to regularly review Kustomization files and apply any necessary updates to avoid issues with API deprecations and ensure compatibility with the latest Kubernetes versions.,
NEW QUESTION # 200
You have a web application that requires a dedicated load balancer to handle incoming traffic and distribute requests across multiple pods- HOW can you set up a dedicated load balancer in Kubernetes using a 'Services and Ingress?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Deployment:
- Create a 'Deployment for your web application.
- Specify the number of replicas, image, and any other necessary configuration.
2. Define a Service: - Create a 'service' to expose your 'Deployment' and provide a load balancing endpoint. - Specify the 'selector to match the labels of your pods and use 'type: Load8alancer' to request a dedicated load balancer from your cloud provider.
3. Configure an Ingress: - Create an 'Ingress' Object to handle incoming traffic and route it to the correct service. - Specify the 'hostname' for your web application and the 'backend' service to which the requests should be forwarded.
4. Apply the Configuration: - Apply the 'Deployment', 'service', and 'Ingress' definitions using 'kubectl apply' or 'kubectl create' 5. Access Your Application: - Once the 'Ingress' is configured, you can access your web application using the specified hostname (e.g., 'my-web-app-example.com'). The load balancer will distribute tne traffic across the available pods of your web application. Note: The 'type: LoadBalancer' service will create a dedicated load balancer in your cloud provider, which will be accessible through an external IP address. The 'Ingress' object will map the hostname to this load balancer, routing traffic to your web application pods.
NEW QUESTION # 201
You're tasked with deploying a containerized application that handles sensitive customer datm The security policy mandates that only containers With specific security profiles can access the dat a. How would you implement Pod Security Standards (PSS) in your Kubernetes cluster to enforce this requirement?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Pod Security Policies:
- Create a Pod Security Policy (PSP) resource using a YAML file.
- Define the allowed security profiles based on your security requirements.
- You can restrict things like:
- Container privileges (root or non-root)
- Allowed capabilities (e.g., 'SYS_ADMINS)
- Security context constraints (e.g., read-only root filesystem)
- Access to host resources (e.g., devices, networking)
2. Apply the Pod Security Policy: - Use 'kubectl apply -f sensitive-data-psp.yamr to apply the PSP to your cluster. 3. Modify Your Deployment (or other workload) to IJse the PSP: - Update the Deployment (or other workload) YAML file to include a 'securitycontext' field that references the PSP you created. - Ensure that the container image and configuration adhere to the constraints defined in the PSP.
4. Verify Deployment: - Use ' kubectl get pods -l app=sensitive-data-app' to ensure your pods are running. - The poos should now adhere to the specified security constraints defined by the PSP 5. Enforcement: - Kubernetes will prevent pods from running if they violate the constraints defined in the PSP - This provides a layer of security enforcement for sensitive applications. Note: PSPs are deprecated in Kubernetes 1.25 and are replaced by Pod Security Admission. For newer Kubernetes versions, you would use Pod Security Admission to enforce these security constraints. ]
NEW QUESTION # 202
You have a Kubernetes deployment tnat uses a ConfigMap to provide configuration settings to your application. You need to update tne ConfigMap with new settings without restarting the deployment.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the ConfigMap:
- Create or update your ConfigMap YAML file, for example, Sapp-config.yaml':
- Replace and 'debug' with the desired new values. 2. Apply the Updated ConfigMap: - Apply the updated ConfigMap using: bash kubectl apply -f app-config.yaml 3. Verify the Update: - Check the updated ConfigMap using: bash kubectl get configmap app-config -o yaml - Confirm that the new settings are reflected in the ConfigMap. 4. (Optional) Monitor Application Logs: - If your application is logging configuration values, you can check the logs to ensure it's now using the updated settings.
NEW QUESTION # 203
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