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

Load testing microservices with Gatling


Gatling is an open source load testing tool that allows users to script custom scenarios using a Scala-based DSL. Scenarios can go beyond simple straight path testing and involve multiple steps, even simulating user behavior, such as pauses and making decisions about how to proceed based on output in the test. Gatling can be used to automate the load testing of microservices or even browser-based web applications.

In the previous recipe, we used Vegeta to send a constant request rate to our message-service. Our request path created a new message and then retrieved all messages for a user. This method had the advantage of being able to test the response time of retrieving all messages for a user as the list of messages grew. Vegeta excels at this type of testing, but because it is fed attack targets from a static file, you cannot use Vegeta to build dynamic request paths based on the responses from previous requests.

Because Gatling uses a DSL to script...