Book Image

Building Microservices with Micronaut®

By : Nirmal Singh, Zack Dawood
Book Image

Building Microservices with Micronaut®

By: Nirmal Singh, Zack Dawood

Overview of this book

The open source Micronaut® framework is a JVM-based toolkit designed to create microservices quickly and easily. This book will help full-stack and Java developers build modular, high-performing, and reactive microservice-based apps using the Micronaut framework. You'll start by building microservices and learning about the core components, such as ahead-of-time compilation, reflection-less dependency injection, and reactive baked-in HTTP clients and servers. Next, you will work on a real-time microservice application and learn how to integrate Micronaut projects with different kinds of relational and non-relational databases. You'll also learn how to employ different security mechanisms to safeguard your microservices and integrate microservices using event-driven architecture in the Apache Kafka ecosystem. As you advance, you'll get to grips with automated testing and popular testing tools. The book will help you understand how you can easily handle microservice concerns in Micronaut projects, such as service discovery, API documentation, distributed configuration management, fallbacks, and circuit breakers. Finally, you'll explore the deployment and maintenance aspects of microservices and get up to speed with the Internet of Things (IoT) using the Framework. By the end of this book, you'll be able to build, test, deploy, and maintain your own microservice apps using the framework.
Table of Contents (20 chapters)
1
Section 1: Core Concepts and Basics
3
Section 2: Microservices Development
8
Section 3: Microservices Testing
10
Section 4: Microservices Deployment
13
Section 5: Microservices Maintenance
15
Section 6: IoT with Micronaut and Closure

Deploying the container artifacts

In the previous section, we explored how we can use Jib to simplify microservice containerization. In this section, we will dive into how we can make the end-to-end deployment seamless and unified using Docker orchestration with docker-compose.

Using docker-compose to deploy the pet-clinic services

docker-compose is a tool available under the Docker ecosystem and is very intuitive in defining and deploying a multi-container application. With a simple YAML-flavored syntax, we can set up all the services and their dependencies and use a single command to deploy the whole application. We will create a docker-compose file for the pet-clinic application covering all the necessary services/components, including microservices, service discovery, and the Apache Kafka ecosystem.

Firstly, let's define the ancillary services in docker-compose as follows:

version: '3'
services:
  consul:
    image: bitnami...