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Beyond the Basics: Istio and IBM Cloud Kubernetes Service Cognitive Class Exam Quiz Answers

Beyond the Basics: Istio and IBM Cloud Kubernetes Service Cognitive Class Certification Answers

Beyond the Basics Istio and IBM Cloud Kubernetes Service Cognitive Class Exam Quiz Answers

Question 1: You must modify your apps to get metrics for those apps.

  • True
  • False

Question 2: You must modify your apps to get distributed tracing for those apps to work properly.

  • True
  • False

Question 3: What distributed tracing system does Istio support by default?

  • Zipkin
  • Kibana
  • LogStash
  • Jaeger

Question 4: In a SOA architecture that uses tradtional debugging techniques, as requests pass through multiple services, identifying performance bottlenecks becomes increasingly difficult.

  • True
  • False

Question 1: The components deployed on the service mesh by default are not exposed outside the cluster.

  • True
  • False

Question 2: In a Kubernetes environment, Istio uses what component to configure ingress behavior?

  • Microservices Ingress controller
  • Kubernetes Ingress Resources
  • Cloud Ingress Resources
  • Resource controller

Question 3: Ingress can provide load balancing, SSL termination, and name-based virtual hosting.

  • True
  • False

Question 4: What is an ingress?

  • A collection of services
  • A collection of pods
  • A collection of rules
  • A collection of clusters

Question 1: Where are routing rules defined?

  • VirtualService
  • VirtualRule
  • DestinationRule
  • ServiceEntry

Question 2: Where are service versions (subsets) defined?

  • VirtualService
  • DestinationRule
  • ServiceEntry
  • DestinationService

Question 3: Which Istio component is responsible for sending traffic management configurations to Istio sidecars?

  • Mixer
  • Citadel
  • Pilot
  • Kubernetes

Question 4: A ServiceEntry rule describes which of the following three items?

  • Ports
  • Traffic policies
  • Endpoints
  • Protocols

Question 1: Citadel provides each microservice with a strong, cryptographic identity in the form of a certificate. The certificate’s lifecycle is fully managed by Istio.

  • True
  • False

Question 2: Istio provides microservices with mutually authenticated connections without requiring app code changes.

  • True
  • False

Question 3: Mutual authentication must be on or off for the entire cluster; gradual adoption is not possible.

  • True
  • False

Question 4: Citadel is not directly responsible for which one of these items?

  • Provides each service with an identity representing its role
  • Provides connections to exchange and validate certificates
  • Provides a common trust root to allow Envoys to validate and authenticate each other
  • Provides a key management system, automating generation, distribution, and rotation of certificates and keys

Question 1: Creating Mixer rules requires app code changes.

  • True
  • False

Question 2: What is the name of the custom code that interacts with the back-end system, such as Prometheus?

  • Rule
  • Instance
  • Adapter
  • Service

Question 3: Istio Mixer moves policy decisions under operator control rather than into configuration.

  • True
  • False

Question 4: Mixer is not responsible for interfacing with the back-end systems.

  • True
  • False

Question 1: What is a service mesh?

  • One or more containers
  • A group of nodes
  • A network of microservices
  • A type of authentication system

Question 2: Which of these features is provided by Istio? Select all the apply.

  • Traffic management
  • Telemetry
  • Policy enforcement
  • Machine learning
  • Mutual TLS
  • App monetization

Question 3: Microservices that are deployed in Istio can communicate to services outside of Istio.

  • True
  • False

Question 4: Which Istio function normally requires users to modify their applications?

  • Traffic management
  • Metrics
  • Distributed tracing
  • Policy enforcement

Question 5: Which Istio component is always required even when you install only certain Istio features?

  • Mixer
  • Pilot
  • Citadel
  • Istioctl

Question 6: Which Istio component is part of the Istio service mesh data plane?

  • Mixer
  • Pilot
  • Citadel
  • Envoy sidecar

Question 7: Which Istio features allow you to configure per namespace?

  • Policy enforcement
  • Traffic management
  • Authentication policy
  • Telemetry

Question 8: To use Istio, a service must run in Kubernetes.

  • True
  • False

Question 9: What’s the purpose of a sidecar container in Kubernetes?

  • It’s a container with Istio installed.
  • It’s utility container in a pod.
  • It helps to speed up the cluster run time.
  • None of these

Question 10: What Istio component primarily manages telemetry?

  • Pilot
  • Istio Citadel
  • Mixer
  • Istio data plane

Question 11: What is an Envoy?

  • A web server
  • A sidecar proxy
  • A pod
  • None of these

Question 12: What component is primarily responsible for traffic management?

  • Pilot
  • Mixer
  • Istio Citadel
  • Security

Question 13: A VirtualService defines policies that apply to traffic intended for a service after routing has occurred.

  • True
  • False

Question 14: ServiceEntry configuration enables services within the mesh to access a service not necessarily managed by Istio.

  • True
  • False

Question 15: A/B testing is a method of performing identical tests against two separate service versions to determine which performs better.

  • True
  • False

Question 16: Telemetry in Istio can help you to pinpoint latency problems in microservices.

  • True
  • False

Question 17: What is the default sidecar proxy in istio?

  • GINX
  • Envoy
  • HAProxy
  • Pilot

Question 18: With what Istio component can you use to write custom adapters for tracing and metrics?

  • Citadel
  • Mixer
  • Pilot
  • Envoy

Question 19: Istio can secure the communication between microservices without requiring app code changes.

  • True
  • False

Question 20: In this course, what is an ingress?

  • A collection of services
  • A collection of rules that allow inbound connections to reach the cluster services
  • A pathway to bypass disabled services
  • None of these

Introduction to Beyond the Basics: Istio and IBM Cloud Kubernetes Service

Beyond the basics, integrating Istio with IBM Cloud Kubernetes Service (IKS) can enhance the capabilities of your Kubernetes-based applications by providing advanced features for traffic management, security, and observability. Istio is an open-source service mesh that facilitates communication, monitoring, and management of microservices in a Kubernetes environment. Here’s how you can leverage Istio with IBM Cloud Kubernetes Service:

1. Install Istio on IBM Cloud Kubernetes Service:

  • Deploying Istio on IKS involves installing the Istio control plane, which includes components like Pilot, Mixer, and Ingress Gateway. Follow the Istio documentation to install Istio on your IBM Cloud Kubernetes cluster.

2. Traffic Management:

  • Leverage Istio’s traffic management features for controlling the flow of traffic between microservices.
    • Traffic Routing: Implement canary releases, A/B testing, and blue-green deployments.
    • Load Balancing: Use Istio to distribute traffic across multiple instances of a service.
    • Fault Injection: Introduce faults to test the resilience of your services.

3. Security:

  • Enhance security in your microservices architecture using Istio’s security features.
    • mTLS (Mutual TLS): Enable mTLS to secure communication between services within the mesh.
    • Authorization Policies: Define fine-grained access control policies for your microservices.
    • Policy Enforcement: Apply security policies consistently across services.

4. Observability:

  • Gain deep insights into your microservices by leveraging Istio’s observability features.
    • Distributed Tracing: Trace requests as they traverse through your microservices.
    • Metrics and Monitoring: Collect and visualize metrics for your services.
    • Logging: Capture and analyze logs for troubleshooting and monitoring.

5. Service Mesh Configuration:

  • Configure Istio to match your specific application requirements.
    • Custom Routing Rules: Define custom routing rules based on HTTP headers, paths, or other attributes.
    • Timeouts and Retries: Set timeout and retry policies for resilient communication.
    • Circuit Breakers: Implement circuit breakers to prevent cascading failures.

6. Integration with IBM Cloud Services:

  • Integrate Istio with other IBM Cloud services to enhance your application’s capabilities.
    • IBM Cloud Monitoring and Analytics: Integrate Istio with monitoring and analytics services on IBM Cloud.
    • IBM Cloud Security Services: Extend security features with additional services provided by IBM Cloud.

7. Continuous Delivery and Deployment:

  • Combine Istio with continuous delivery and deployment practices to automate the release process.
    • Automated Canary Deployments: Implement automated canary releases with Istio.
    • Continuous Deployment Pipelines: Integrate Istio into your CI/CD pipelines.

8. Scalability and Performance:

  • Optimize your microservices for scalability and performance using Istio.
    • Load Balancing Strategies: Explore different load balancing strategies provided by Istio.
    • Performance Monitoring: Use Istio metrics to monitor and optimize performance.

9. Documentation and Community Resources:

  • Stay informed and leverage the resources provided by the Istio community and IBM Cloud.
    • Istio Documentation: Refer to the official Istio documentation for in-depth guides and references.
    • IBM Cloud Kubernetes Service Documentation: Explore specific guidelines and best practices for using Istio on IBM Cloud Kubernetes Service.

By integrating Istio with IBM Cloud Kubernetes Service and exploring its advanced features, you can enhance the resilience, security, and observability of your microservices-based applications. It’s recommended to follow the official documentation for both Istio and IBM Cloud Kubernetes Service to ensure proper configuration and compatibility.

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