Table Of Content

JavaScript Cloud Native Development Cookbook Deliver serverless cloud-native solutions on AWS, Azure, and GCP John Gilbert BIRMINGHAM - MUMBAI JavaScript Cloud Native Development Cookbook Copyright © 2018 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing or its dealers and distributors, will be held liable for any damages caused or alleged to have been caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. Commissioning Editor: Merint Mathew Acquisition Editor: Alok Dhuri Content Development Editor: Akshada Iyer Technical Editor: Adhithya Haridas Copy Editor: Safis Editing Project Coordinator: Prajakta Naik Proofreader: Safis Editing Indexer: Priyanka Dhadke Graphics: Jisha Chirayil Production Coordinator: Aparna Bhagat First published: September 2018 Production reference: 1260918 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78847-041-4 www.packtpub.com To my wife, Sarah, and our families, for their endless love and support on this journey. mapt.io Mapt is an online digital library that gives you full access to over 5,000 books and videos, as well as industry leading tools to help you plan your personal development and advance your career. For more information, please visit our website. Why subscribe? Spend less time learning and more time coding with practical eBooks and videos from over 4,000 industry professionals Improve your learning with Skill Plans built especially for you Get a free eBook or video every month Mapt is fully searchable Copy and paste, print, and bookmark content PacktPub.com Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.packt.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at [email protected] for more details. At www.packt.com, you can also read a collection of free technical articles, sign up for a range of free newsletters, and receive exclusive discounts and offers on Packt books and eBooks. Foreword I have known John for a little over two years through his involvement in cloud technologies, especially in serverless architectures and building applications using the Serverless Framework. He took us on a cloud-native journey, thinking and reasoning about new paradigms in building software on the cloud in his previous book, Cloud Native Development Patterns and Best Practices. Continuing on his journey to explore cloud-native systems, he brings us his new book, JavaScript Cloud Native Development Cookbook, to showcase recipes in a cookbook format that deliver lean and autonomous cloud-native services. In a nutshell, the recipes in the book demonstrate how to build cloud-native software at a global scale, utilize event- driven architectures, and build an autonomous development environment, starting with a developer committing code to deploying the application using a continuous deployment pipeline. Serverless computing is the way to go when building cloud-native applications. With no servers to manage or patch, pay-per-execution billing, no paying for idling, auto-scaling, and a microservices/event-driven architecture, there is really no reason not to adopt serverless computing. In this book, John presents practical Node.js recipes for building serverless cloud-native applications on AWS. The recipes are battle-tested and work around the pitfalls that present themselves in real-life scenarios. The recipes are built with best practices and practical development workflows in mind. John takes the traditional cloud-native principles and shows you how to implement them with serverless technologies to give you the ultimate edge in building and deploying modern cloud-native applications. The book covers building a stack from scratch and deploying it to AWS using the Serverless Framework, which automates a lot of the mundane work, letting you focus on building the business functionality. It goes on to incorporate event sourcing, CQRS patterns, and data lakes, and shows you how to implement autonomous cloud-native services. The recipes cover leveraging CDN to execute code on the edge of the cloud and implementing security best practices. It walks you through techniques that optimize for performance and observability while designing applications for managing failures. It showcases deployment at scale, using multiple regions to tackle latency-based routing, regional failovers, and regional database replication. You will find extensive explanations on core concepts, code snippets with how-it-works details, and a full source code repository of these recipes, for easy use in your own projects. This book has a special place on my bookshelf, and I hope you will enjoy it as much as I did. Rupak Ganguly Enterprise Relations and Advocacy, Serverless Inc. Contributors About the author John Gilbert is a CTO with over 25 years of experience of architecting and delivering distributed, event-driven systems. His cloud journey started more than five years ago and has spanned all the levels of cloud maturity—through lift and shift, software-defined infrastructure, microservices, and continuous deployment. He is the author of Cloud Native Development Patterns and Best Practices. He finds delivering cloud-native solutions to be by far the most fun and satisfying, as they force us to rewire how we reason about systems and enable us to accomplish far more with much less effort. I want to thank Pierre Malko and the whole Dante team, past and present, for the roles everyone played in our cloud-native journey. I want to thank the team at Packt, particularly Alok Dhuri and Akshada Iyer, who made this book possible. And I want to thank Joseph Staley and Max Brinegar for their efforts as technical reviewers. About the reviewers Max Brinegar is a principal software engineer with credentials that include a B.S. degree in Computer Science from University of Maryland, College Park, experience in cloud native development at Dante Consulting, Inc., and an AWS developer certification. Experience and expertise include web services development and deployment, modern programming techniques, information processing, and serverless architecture for software on AWS and Azure. Joseph Staley is a senior software developer who currently specializes in JavaScript and cloud computing architecture. With over 20 years of experience in software design and development, he has helped create solutions for many companies across many industries. Originally building solutions utilizing on-premise Java servers, he has transitioned to implementing cloud-based solutions with JavaScript. Packt is searching for authors like you If you're interested in becoming an author for Packt, please visit authors.packtpub.com and apply today. We have worked with thousands of developers and tech professionals, just like you, to help them share their insight with the global tech community. You can make a general application, apply for a specific hot topic that we are recruiting an author for, or submit your own idea. Table of Contents Preface 1 Chapter 1: Getting Started with Cloud-Native 8 Introduction 8 Creating a stack 9 Getting ready 9 How to do it... 9 How it works... 12 Creating a function and working with metrics and logs 14 How to do it... 14 How it works... 18 Creating an event stream and publishing an event 19 How to do it... 19 How it works... 22 Creating a stream processor 24 Getting ready 24 How to do it... 25 How it works... 27 Creating an API Gateway 29 How to do it... 29 How it works... 32 Deploying a single-page application 33 How to do it... 33 How it works... 36 Chapter 2: Applying the Event Sourcing and CQRS Patterns 38 Introduction 39 Creating a data lake 39 Getting ready 40 How to do it... 40 How it works... 42 Applying the event-first variant of the Event Sourcing pattern 43 How to do it... 44 How it works... 46 Creating a micro event store 47 How to do it... 47 How it works... 51 Applying the database-first variant of the Event Sourcing pattern with DynamoDB 52 How to do it... 53