Book Image

Microservices with Clojure

By : Anuj Kumar
Book Image

Microservices with Clojure

By: Anuj Kumar

Overview of this book

The microservice architecture is sweeping the world as the de facto pattern with which to design and build scalable, easy-tomaintain web applications. This book will teach you common patterns and practices, and will show you how to apply these using the Clojure programming language. This book will teach you the fundamental concepts of architectural design and RESTful communication, and show you patterns that provide manageable code that is supportable in development and at scale in production. We will provide you with examples of how to put these concepts and patterns into practice with Clojure. This book will explain and illustrate, with practical examples, how teams of all sizes can start solving problems with microservices. You will learn the importance of writing code that is asynchronous and non-blocking and how Pedestal helps us do this. Later, the book explains how to build Reactive microservices in Clojure that adhere to the principles underlying the Reactive Manifesto. We finish off by showing you various ways to monitor, test, and secure your microservices. By the end, you will be fully capable of setting up, modifying, and deploying a microservice with Clojure and Pedestal.
Table of Contents (18 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Automated continuous deployment


The core philosophy of a microservice environment must be based on the You build it, you run it (https://queue.acm.org/detail.cfm?id=1142065) model; that is, the team working on the microservice must own it end to end, right from development to deployment. The infrastructure required for the team to integrate, test, and deploy any changes must be completely automated. This makes it possible to build a continuous integration and continuous delivery (CD) pipeline, which is the backbone of microservices-based architectures.

CI/CD

The term CI/CD combines the practices of CI and CD together as a seamless process. In a typical microservices-based setup, the team continuously works on enhancing the features of the microservice and fixing the issues that are encountered in production.

The entire cycle from development to deployment has three major phases, as shown in the following diagram:

In the first phase, the team commits the changes to a version control repository...