Book Image

Microservices Development Cookbook

By : Paul Osman
Book Image

Microservices Development Cookbook

By: Paul Osman

Overview of this book

Microservices have become a popular choice for building distributed systems that power modern web and mobile apps. They enable you to deploy apps as a suite of independently deployable, modular, and scalable services. With over 70 practical, self-contained tutorials, the book examines common pain points during development and best practices for creating distributed microservices. Each recipe addresses a specific problem and offers a proven, best-practice solution with insights into how it works, so you can copy the code and configuration files and modify them for your own needs. You’ll start by understanding microservice architecture. Next, you'll learn to transition from a traditional monolithic app to a suite of small services that interact to ensure your client apps are running seamlessly. The book will then guide you through the patterns you can use to organize services, so you can optimize request handling and processing. In addition this, you’ll understand how to handle service-to-service interactions. As you progress, you’ll get up to speed with securing microservices and adding monitoring to debug problems. Finally, you’ll cover fault-tolerance and reliability patterns that help you use microservices to isolate failures in your apps. By the end of this book, you’ll have the skills you need to work with a team to break a large, monolithic codebase into independently deployable and scalable microservices.
Table of Contents (16 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Configuring your service to run in a container


As we know, services are made up of source code and configurations. A service written in Java, for instance, can be packaged as a Java Archive (JAR) file containing compiled class files in Java bytecode, as well as resources such as configuration and properties files. Once packaged, the JAR file can then be executed on any machine running a Java Virtual Machine (JVM).

In order for this to work, however, the machine that we want to run our service on must have a JVM installed. Oftentimes, it must be a specific version of the JVM. Additionally, the machine might need to have some other utilities installed, or it might need access to a shared filesystem. While these are not parts of the service themselves, they do make up what we refer to as the runtime environment of the service.

Linux containers are a technology that allow developers to package an application or service with its complete runtime environment. Containers separate out the runtime...