Book Image

Serverless Design Patterns and Best Practices

By : Brian Zambrano
Book Image

Serverless Design Patterns and Best Practices

By: Brian Zambrano

Overview of this book

Serverless applications handle many problems that developers face when running systems and servers. The serverless pay-per-invocation model can also result in drastic cost savings, contributing to its popularity. While it's simple to create a basic serverless application, it's critical to structure your software correctly to ensure it continues to succeed as it grows. Serverless Design Patterns and Best Practices presents patterns that can be adapted to run in a serverless environment. You will learn how to develop applications that are scalable, fault tolerant, and well-tested. The book begins with an introduction to the different design pattern categories available for serverless applications. You will learn thetrade-offs between GraphQL and REST and how they fare regarding overall application design in a serverless ecosystem. The book will also show you how to migrate an existing API to a serverless backend using AWS API Gateway. You will learn how to build event-driven applications using queuing and streaming systems, such as AWS Simple Queuing Service (SQS) and AWS Kinesis. Patterns for data-intensive serverless application are also explained, including the lambda architecture and MapReduce. This book will equip you with the knowledge and skills you need to develop scalable and resilient serverless applications confidently.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

System architecture


At first glance, a three-tier web application using a REST API can be an easy topic and pattern. After all, there are only three layers, which are responsible for very discrete tasks, and the final result is just a web application after all. However, there are many nuances and areas for tweaking with any web application. Serverless web applications are no different. This chapter will attempt to cover as many areas as possible, but it's impossible to include every possible configuration or design option.

Seeing as we are responsible software designers, let's sketch out our architecture at a high level and drill down into more detail as we work through the different layers:

This diagram should look familiar as it's the backbone of many client-server web applications out there today. Let's walk through the different layers, going from the top down. After discussing these layers at a high level, we'll get into the implementation details with a real-world example.

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