Book Image

Practical Microservices with Dapr and .NET - Second Edition

By : Davide Bedin
Book Image

Practical Microservices with Dapr and .NET - Second Edition

By: Davide Bedin

Overview of this book

This second edition will help you get to grips with microservice architectures and how to manage application complexities with Dapr in no time. You'll understand how Dapr simplifies development while allowing you to work with multiple languages and platforms. Following a C# sample, you'll understand how Dapr's runtime, building blocks, and software development kits (SDKs) help you to simplify the creation of resilient and portable microservices. Dapr provides an event-driven runtime that supports the essential features you need for building microservices, including service invocation, state management, and publish/subscribe messaging. You'll explore all of those in addition to various other advanced features with this practical guide to learning Dapr. With a focus on deploying the Dapr sample application to an Azure Kubernetes Service cluster and to the Azure Container Apps serverless platform, you’ll see how to expose the Dapr application with NGINX, YARP, and Azure API Management. By the end of this book, you'll be able to write microservices easily by implementing industry best practices to solve problems related to distributed systems.

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Table of Contents (20 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Download the example code files
Download the color images
Conventions used
Get in touch
Share Your Thoughts
Download a free PDF copy of this book
1
Part 1: Introduction to Dapr
Part 1: Introduction to Dapr
Free Chapter
2
Chapter 1: Introducing Dapr
Chapter 1: Introducing Dapr
Technical requirements
Understanding Dapr
Exploring Dapr
Setting up Dapr
Building our first Dapr sample
Summary
Questions
Further reading
3
Chapter 2: Debugging Dapr Solutions
Chapter 2: Debugging Dapr Solutions
Technical requirements
Configuring VS Code debug for Dapr
Debugging a Dapr multi-project solution
Using Tye with Dapr
Summary
Questions
Further reading
4
Chapter 3: Microservices Architecture with Dapr
Chapter 3: Microservices Architecture with Dapr
Introducing our sample solution
Discovering microservices
Adopting microservices patterns
Building an e-commerce architecture
Building microservices with Dapr
Summary
Questions
Further reading
5
Part 2: Building Microservices with Dapr
Part 2: Building Microservices with Dapr
6
Chapter 4: Service-to-Service Invocation
Chapter 4: Service-to-Service Invocation
Technical requirements
Invoking services with Dapr
Service invocation with the .NET SDK
Comparing HTTP and gRPC for Dapr
Summary
Questions
Further reading
7
Chapter 5: Introducing State Management
Chapter 5: Introducing State Management
Technical requirements
Managing state in Dapr
Stateful services in an e-commerce ordering system
Using Azure Cosmos DB as a state store
Summary
8
Chapter 6: Publish and Subscribe
Chapter 6: Publish and Subscribe
Technical requirements
Using the pub/sub pattern in Dapr
Using Azure Service Bus (ASB) in Dapr
Implementing a saga pattern
Summary
9
Chapter 7: Resource Bindings
Chapter 7: Resource Bindings
Technical requirements
Learning how to use Dapr bindings
Using Twilio output bindings in Dapr
Ingesting data with the Azure Event Hubs input binding
Summary
10
Chapter 8: Using Actors
Chapter 8: Using Actors
Technical requirements
Using actors in Dapr
Actor concurrency, consistency, and lifetime
Implementing actors in an e-commerce reservation system
Summary
11
Part 3: Deploying and Scaling Dapr Solutions
Part 3: Deploying and Scaling Dapr Solutions
12
Chapter 9: Deploying to Kubernetes
Chapter 9: Deploying to Kubernetes
Technical requirements
Setting up Kubernetes
Setting up Dapr on Kubernetes
Deploying a Dapr application to Kubernetes
Exposing Dapr applications to external clients
Summary
13
Chapter 10: Exposing Dapr Applications
Chapter 10: Exposing Dapr Applications
Technical requirements
Daprizing ingress controllers
Setting up API management on Kubernetes
Configuring Dapr policies with API management
Summary
14
Chapter 11: Tracing Dapr Applications
Chapter 11: Tracing Dapr Applications
Technical requirements
Observing applications in Dapr
Tracing with Zipkin
Analyzing metrics with Prometheus and Grafana
Summary
15
Chapter 12: Load Testing and Scaling Dapr
Chapter 12: Load Testing and Scaling Dapr
Technical requirements
Scaling Dapr on Kubernetes
Load testing with Locust
Load testing Dapr
Autoscaling with KEDA
Summary
16
Chapter 13: Leveraging Serverless Containers with Dapr
Chapter 13: Leveraging Serverless Containers with Dapr
Technical requirements
Learning about the Azure Container Apps architecture
Setting up Azure Container Apps
Deploying Dapr with Azure Container Apps
Autoscaling Azure Container Apps with KEDA
Summary
17
Assessments
Assessments
Chapter 1, Introducing Dapr
Chapter 2, Debugging Dapr Solutions
Chapter 3, Microservices Architecture with Dapr
Chapter 4, Service-to-Service Invocation
18
Index
Index
Why subscribe?
19
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Tracing with Zipkin

Zipkin is an open source distributed tracing system. It offers the ability to search for traces by identifier (ID), service, operation, or tags, and shows the dependencies between services. You can learn more at https://zipkin.io/.

These are the steps we will follow to set up Zipkin in Dapr on Kubernetes:

  1. Setting up Zipkin
  2. Configuring tracing with Zipkin
  3. Enabling tracing in Dapr
  4. Investigating with Zipkin

Let’s start by installing Zipkin in the cluster we prepared in Chapter 9, Deploying to Kubernetes.

Setting up Zipkin

Zipkin is distributed as a Docker container. You probably already have it on your local development environment, as it has been installed by default with Dapr.

We can deploy it to Kubernetes with the following Deploy\deploy-zipkin.yaml file:

apiVersion:  apps/v1
kind:  Deployment
metadata:
    name:  zipkin
    labels:
  ...
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