Book Image

Practical Microservices with Dapr and .NET

By : Davide Bedin
Book Image

Practical Microservices with Dapr and .NET

By: Davide Bedin

Overview of this book

Over the last decade, there has been a huge shift from heavily coded monolithic applications to finer, self-contained microservices. Dapr is a new, open source project by Microsoft that provides proven techniques and best practices for developing modern applications. It offers platform-agnostic features for running your applications on public cloud, on-premises, and even on edge devices. This book 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 offers ease of implementation while allowing you to work with multiple languages and platforms. You'll also understand how Dapr's runtime, services, 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 to build 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. By the end of this book, you'll be able to write microservices easily using your choice of language or framework by implementing industry best practices to solve problems related to distributed systems.
Table of Contents (16 chapters)
1
Section 1: Introduction to Dapr
4
Section 2: Building Microservices with Dapr
10
Section 3: Deploying and Scaling Dapr Solutions

Exposing Dapr applications to external clients

At this stage of deploying the Biscotti Brutti Ma Buoni backend solution to Kubernetes, we have all the Dapr components and applications properly configured. However, without the proper configurations, no external calls can reach any of our service APIs.

Our objective is to expose the ASP.NET endpoints of the Dapr applications, starting with order-service, so that we can invoke the /order API method from our client machine. The following diagram shows what we are trying to achieve:

Figure 8.6 – The main components of a Kubernetes deployment

In the preceding diagram, the main Dapr services are depicted in Kubernetes alongside our Dapr applications. They are represented as Pods containing the ASP.NET container, along with the service code and the Dapr sidecar.

We need to configure our Kubernetes cluster with an ingress controller (IC). For this, we can use NGINX. A detailed step-by-step configuration...