Book Image

Hands-On Serverless Applications with Go

By : Mohamed Labouardy
Book Image

Hands-On Serverless Applications with Go

By: Mohamed Labouardy

Overview of this book

Serverless architecture is popular in the tech community due to AWS Lambda. Go is simple to learn, straightforward to work with, and easy to read for other developers; and now it's been heralded as a supported language for AWS Lambda. This book is your optimal guide to designing a Go serverless application and deploying it to Lambda. This book starts with a quick introduction to the world of serverless architecture and its benefits, and then delves into AWS Lambda using practical examples. You'll then learn how to design and build a production-ready application in Go using AWS serverless services with zero upfront infrastructure investment. The book will help you learn how to scale up serverless applications and handle distributed serverless systems in production. You will also learn how to log and test your application. Along the way, you'll also discover how to set up a CI/CD pipeline to automate the deployment process of your Lambda functions. Moreover, you'll learn how to troubleshoot and monitor your apps in near real-time with services such as AWS CloudWatch and X-ray. This book will also teach you how to secure the access with AWS Cognito. By the end of this book, you will have mastered designing, building, and deploying a Go serverless application.
Table of Contents (17 chapters)

Load testing and scaling

In this part, we will generate random workloads to see how Lambda acts when incoming requests increase. To achieve that, we will use a load-testing tool, such as Apache Bench. In this chapter, I will be using hey, which is a Go-based tool, and is very efficient and faster than classic HTTP benchmarking tools due to Golang's built-in concurrency. You can download it by installing the following Go package from your terminal:

go get -u github.com/rakyll/hey
Be sure that the $GOPATH variable is set to be able to execute the hey command regardless of your current directory, or you can add the $HOME/go/bin folder to the $PATH variable.

Lambda autoscaling

Now, we are ready to run our first harness or...