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.
Table of Contents (20 chapters)
1
Part 1: Introduction to Dapr
5
Part 2: Building Microservices with Dapr
11
Part 3: Deploying and Scaling Dapr Solutions

Autoscaling Azure Container Apps with KEDA

In this section, we will learn how to leverage the autoscale features of Azure Container Apps. We will cover the following main topics:

  • Learning about KEDA autoscalers
  • Applying KEDA to Azure container apps
  • Testing KEDA with container apps

Our first objective is to learn about KEDA.

Learning about KEDA autoscalers

The Azure Container Apps service provides a powerful abstraction on a complex topic such as scaling microservices by abstracting the Kubernetes default scaling concepts and by adopting KEDA. You can learn all about it in the documentation at https://docs.microsoft.com/en-us/azure/container-apps/scale-app.

KEDA is an open source project started by Red Hat and Microsoft, now a CNCF incubating project, that extends the capabilities of the Kubernetes autoscaler to allow developers to scale workload on event-based metrics coming from an incredibly diverse set of scalers. As an example, with KEDA, you can...