Book Image

Microservices with Azure

By : Rahul Rai, Namit Tanasseri
Book Image

Microservices with Azure

By: Rahul Rai, Namit Tanasseri

Overview of this book

Microsoft Azure is rapidly evolving and is widely used as a platform on which you can build Microservices that can be deployed on-premise and on-cloud heterogeneous environments through Microsoft Azure Service Fabric. This book will help you understand the concepts of Microservice application architecture and build highly maintainable and scalable enterprise-grade applications using the various services in Microsoft Azure Service Fabric. We will begin by understanding the intricacies of the Microservices architecture and its advantages over the monolithic architecture and Service Oriented Architecture (SOA) principles. We will present various scenarios where Microservices should be used and walk you through the architectures of Microservice-based applications. Next, you will take an in-depth look at Microsoft Azure Service Fabric, which is the best–in-class platform for building Microservices. You will explore how to develop and deploy sample applications on Microsoft Azure Service Fabric to gain a thorough understanding of it. Building Microservice-based application is complicated. Therefore, we will take you through several design patterns that solve the various challenges associated with realizing the Microservices architecture in enterprise applications. Each pattern will be clearly illustrated with examples that you can keep referring to when designing applications. Finally, you will be introduced to advanced topics such as Serverless computing and DevOps using Service Fabric, to help you undertake your next venture with confidence.
Table of Contents (23 chapters)
Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Part 1 – Laying The Foundation
Part 2 – Microsoft Azure Service Fabric
Part 3 – Microservice Architecture Patterns
Part 4 – Supplementary Learning

Health entities


Health entities, in the context of Service Fabric, can be considered as logical entities used by the runtime. These entities form a logical hierarchy based on the dependencies and interactions among them.

Service Fabric uses a health store to persist the hierarchy of its health entities and their health information. To ensure high availability, health store is implemented as a stateful service within the Service Fabric cluster and is instantiated with when the cluster starts.

The health subsystem leverages the health entities and hierarchy to effectively report, debugg, and monitor. The following diagram illustrates the hierarchy of health entities:

Hierarchy of health entities

You may notice that the health entities match the Service Fabric deployment entities discussed earlier in this book. Let's dive deeper to understand each of these entities and the parent-child relationships illustrated in the preceding figure.

The root node, Cluster represents the health of Service Fabric...