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

Setting up CI with CircleCI


There is a reasonably extensive landscape when it comes to hosted CI systems. If you add in self-hosted systems, the list grows even longer. Tools such as Jenkins have been around for many years, initially as self-hosted systems. Inevitably, hosted versions of tools such as Jenkins have emerged from various companies. In this section, we'll walk through the steps of setting up CircleCI (https://circleci.com) to run our unit tests and produce a code coverage report on every code commit.

Note

Since this is a book about serverless patterns, I'll encourage you to pick whatever tool works for your purposes with a very strong lean towards hosted CI/CD system. Using a hosted CI/CD systems means that you can focus more on your application code rather than the CI/CD system, which is just a tool we need to get our jobs done.

Setting up a brand new project with CircleCI is quite simple, and it has easy integration with both GitHub and Bitbucket. The first thing you'll need...