Getting started with Microservices with Istio and IBM Cloud Kubernetes Service Cognitive Class Exam Answers

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Introduction to Getting started with Microservices with Istio and IBM Cloud Kubernetes Service

Getting started with microservices using Istio and IBM Cloud Kubernetes Service (IKS) is a powerful way to leverage cloud-native technologies for building scalable and resilient applications. Istio, as a service mesh, provides a robust framework for managing microservices communication, security, and observability.

Here’s an introductory guide to help you get started:

1. Understanding Microservices and Istio

• Microservices Architecture: Microservices are an architectural style where applications are composed of small, independent services that communicate over well-defined APIs.
• Istio: Istio is an open-source service mesh that provides traffic management, security, observability, and policy enforcement for microservices.

2. Setting up IBM Cloud Kubernetes Service (IKS)

• Sign up for IBM Cloud: If you haven’t already, sign up for IBM Cloud at ibm.com/cloud.
• Create a Kubernetes Cluster: Use IBM Cloud Console to create a Kubernetes cluster using IBM Cloud Kubernetes Service. Follow the documentation and tutorials provided by IBM Cloud to set up your cluster.

3. Installing Istio on Kubernetes

• Download Istio: Download the Istio release from istio.io.
• Install Istio: Follow the Istio installation instructions to install Istio on your Kubernetes cluster. This typically involves deploying custom resource definitions and Istio components using Kubernetes manifests provided by Istio.

4. Deploying Microservices

• Develop Microservices: Develop your microservices using your preferred programming languages and frameworks (e.g., Java/Spring Boot, Node.js/Express, Python/Flask).
• Containerize Microservices: Containerize your microservices using Docker. Write Dockerfiles for each microservice to define its dependencies and build instructions.
• Deploy to Kubernetes: Deploy your containerized microservices to your IBM Cloud Kubernetes Service cluster. Use Kubernetes manifests (YAML files) to define deployments, services, and ingress rules.

5. Configuring Istio for Microservices

• Traffic Management: Use Istio to manage traffic between microservices. Define traffic routing rules, set up load balancing, and implement canary deployments.
• Security: Enable Istio’s security features like mTLS (mutual TLS) authentication between services, and implement access control policies.
• Observability: Leverage Istio’s observability tools such as Grafana for metrics, Jaeger for distributed tracing, and Kiali for visualizing service mesh topology.

6. Monitoring and Scaling

• Monitoring: Set up monitoring and alerting for your microservices and Istio components using IBM Cloud Monitoring or other monitoring tools integrated with Istio.
• Scaling: Configure horizontal pod autoscaling (HPA) for your microservices based on metrics like CPU utilization or incoming request rate.

7. Continuous Integration and Deployment (CI/CD)

• CI/CD Pipeline: Implement a CI/CD pipeline to automate the build, test, and deployment of microservices on Kubernetes with Istio. Use tools like Jenkins, GitLab CI/CD, or IBM Cloud Continuous Delivery.

8. Best Practices and Optimization

• Best Practices: Follow best practices for microservices architecture, Kubernetes deployments, and Istio configuration to ensure scalability, resilience, and security.
• Optimization: Continuously optimize your microservices and Istio configurations based on performance metrics and user feedback.

9. Resources and Further Learning

• Documentation: Refer to IBM Cloud and Istio documentation for detailed guides, tutorials, and best practices.
• Community Support: Engage with the Kubernetes and Istio communities for support, tips, and best practices.

By following these steps, you can begin exploring the capabilities of microservices with Istio on IBM Cloud Kubernetes Service, empowering you to build modern, scalable applications efficiently.

Getting started with Microservices with Istio and IBM Cloud Kubernetes Service Cognitive Class Certification Answers

Twelve Factors App Quiz Answers

Question 1: The 12-factor app methodology minimizes divergence among development and production, enabling continuous deployment for maximum agility.

• True
• False

Question 2: Disposability refers to which of these concepts?

• An app runs as one or more stateless processes that share nothing and assumes process memory is transient.
• Apps are built in distinct stages (build, release, run).
• Processes start fast and shut down gracefully, which means that processors should start almost instantaneously.
• Developers treat logs as event streams: the outer/hosting environment deals with processing and routing log files.

Question 3: According to the twelve-factor app methodology, where should you store configuration information?

• In the environment
• In the code
• In the server where you deploy the code
• In the properties files

Question 4: When you are trying to build a scalable, distributed, cloud-ready app, you should run that app as one or more stateless processes.

• True
• False

Microservices Quiz Answers

Question 1: For a simple change, monolithic apps take a long time to get the updated app redeployed.

• True
• False

Question 2: Select the three benefits of implementing a microservices architecture.

• Different parts of a development team can manage individual parts of a microservice.
• You’ll see less service interruption for fast-paced cloud computing.
• A suite of services can be deployed and upgraded without a rebuild of other functioning services.
• If one component fails, it will all fail.

Question 3: Which principle is exemplified by this statement? “Microservices are an app architectural style that divides an app into components where each component is a full but miniature app that’s focused on producing a single business task.”

• The Single Business Task principle
• The Single Responsibility principle
• The Multiple Component principle
• The Microservices principle

Question 4: Agile development methods helped make microservice design and implementation possible.

• True
• False

Application Architecture Evolution Quiz Answers

Question 1: The SOA stack had to string together sequences of services as business processes that were themselves macroservices.

• True
• False

Question 2: A microservice app must have a well-defined interface and well-defined dependencies.

• True
• False

Question 3: What problems do you typically encounter when you develop monolithic apps? Select all that apply.

• No one person can maintain a vertical slice of an app.
• Developer challenges are with DevOps, management views, and controls.
• Developers spend a lot of time in meetings deciding how the layers of code should work together.
• A change in one layer usually broke the layers above it.

Question 4: You can use IBM Cloud Kubernetes Service to repackage monolithic apps into containers.

• True
• False

Microservices Component Architecture Quiz Answers

Question 1: The number of business services that you implement for an app depends on what types of clients the app supports and how specialized those clients require their dispatchers to be.

• True
• False

Question 2: In this course, BFF refers to which concept?

• Best friend forever
• Back for front
• Backend for frontend
• Backend first failure

Question 3: You should separate the database access layer into its own service.

• True
• False

Question 4: It’s more efficient and effective to have one team write all or multiple dispatchers while someone else implements the client apps.

• True
• False

Microservice Integration Quiz Answers

Question 1: You should not mix and match synchronous and asynchronous communication.

• True
• False

Question 2: By using asynchronous communication, you can make microservices more robust. Which of these actions is not used in asynchronous communication?

• A different requester instance can handle the response.
• The requester, provider, and messages must keep working through the lifetime of the invocation.
• The messaging system holds the action and result.
• The requester doesn’t need to block while the provider runs.

Question 3: Which of these methods help with complete decoupling of microservice intercommunication?

• Service registry or service discovery
• Load balancing
• Circuit breaker patterns
• All of these

Question 4: The public VLAN determines the public IP address that is assigned to a worker node during cluster creation.

• True
• False

Service Mash Quiz Answers

Question 1: In monolithic apps, the location of resources are well known, relatively static, and found in configuration files or hard coded.

• True
• False

Question 2: A service registry is used to keep track of the code and health of services.

• True
• False

Question 3: Which of the following common functions are provided by service mesh implementation like Istio? Select all that apply.

• Automated testing
• Service registry
• Service discovery
• Service proxy

Question 4: Client-side discovery uses a load balancer to query the service registry and direct a request to the appropriate service instance.

• True
• False

Istio: An Intelligent Service Mesh for Microservices Quiz Answers

Question 1: You add Istio support to services by deploying a special sidecar proxy throughout your environment that intercepts all logs among microservices.

• True
• False

Question 2: Which source projects were the basis for Istio?

• IBM’s Amalgam8 project
• Google’s Service Control
• Lyft’s Envoy proxy
• All of these

Question 3: Istio is an open platform service mesh implementation for connecting, managing, and securing microservices.

• True
• False

Question 4: Select the three benefits of implementing a microservices architecture.

• Different parts of a development team can manage individual parts of a microservice.
• You’ll see less service interruption for fast-paced cloud computing.
• A suite of services can be deployed and upgraded without a rebuild of other functioning services.
• If one component fails, everything fails.

Getting started with Microservices with Istio and IBM Cloud Kubernetes Service Final Exam Answers

Question 1: Which component is responsible for collecting telemetry data from the Envoy proxy and other services?

• Citadel
• Kubernetes container
• Mixer
• Pilot

Question 2: What is the core Istio component that is used for traffic management and configuration of all Envoy instances deployed in an Istio service mesh?

• Mixer
• Citadel
• Pilot
• None of these

Question 3: Which of these twelve-factor app methodologies ties into agile software delivery, continuous integration, and continuous deployment concepts, and minimizing incompatibility?

• Admin processes
• Dependencies
• Development and production parity
• Build, release, run

Question 4: Which of these principles when they’re applied to developing microservices can make developers more efficient? Select all that apply.

• Creating well-defined interfaces that are independently deployed
• Managing one large app that does everything
• Operating in small teams with each team owning the entire lifecycle of the service
• Reducing an app into single-function modules

Question 5: You can’t roll back a microservice deployment to a specified version within IBM Cloud Kubernetes Service.

• True
• False

Question 6: 12-factor apps should be scaled up via vertical scaling.

• True
• False

Question 7: The aim of a microservice architecture is to completely link app components to one another so that they can be maintained, scaled, and more.

• True
• False

Question 8: What are the two key tenets of a microservice architecture?

• Services are optimized for multiple functions.
• Communication is done through REST API and message brokers.
• Continuous integration and continuous deployment (CI/CD) are defined per service.
• Business functions are packaged as a single monolith app.

Question 9: Microservices scale and fail interdependently.

• True
• False

Question 10: Which functions enable each service to find and connect with the other services it needs to do its work?

• Sidecar
• Service discovery
• Service registry
• Circuit breaker

Question 11: The Istio service mesh is logically split into which two parts?

• Control plane
• Network plane
• Data plane
• Infrastructure plane

Question 12: The data plane is composed of a set of intelligent proxies deployed as sidecars that mediate and control all security among microservices.

• True
• False

Question 13: The control plane manages and configures proxies to route traffic and to enforce policies at runtime

• True
• False

Question 14: What are the main features of Citadel?

• Service-to-service and end-user authentication using mutual TLS
• Identity management
• Logging management
• Credential management

Question 15: Istio authentication includes key management.

• True
• False