Book Image

Learn AWS Serverless Computing

By : Scott Patterson
Book Image

Learn AWS Serverless Computing

By: Scott Patterson

Overview of this book

Serverless computing is a way to run your code without having to provision or manage servers. Amazon Web Services provides serverless services that you can use to build and deploy cloud-native applications. Starting with the basics of AWS Lambda, this book takes you through combining Lambda with other services from AWS, such as Amazon API Gateway, Amazon DynamoDB, and Amazon Step Functions. You’ll learn how to write, run, and test Lambda functions using examples in Node.js, Java, Python, and C# before you move on to developing and deploying serverless APIs efficiently using the Serverless Framework. In the concluding chapters, you’ll discover tips and best practices for leveraging Serverless Framework to increase your development productivity. By the end of this book, you’ll have become well-versed in building, securing, and running serverless applications using Amazon API Gateway and AWS Lambda without having to manage any servers.
Table of Contents (20 chapters)
Free Chapter
1
Section 1: Why We're Here
4
Section 2: Getting Started with AWS Lambda Functions
9
Section 3: Development Patterns
12
Section 4: Architectures and Use Cases

Setting up security

Let's talk about an important topic: how we secure access for entities that are invoking functions, as well as what functions can do while executing. These security features are used to secure the Lambda service itself and wouldn't necessarily be used to secure a web application.

Next up, we will cover the permissions model. You will learn about the difference between execution policies using IAM roles, as well as function/resource policies.

Execution policies

The first thing we should talk about is execution policies. These policies are attached to a service-linked role and define what AWS resources can be accessed by that role. The policy itself follows the same syntax as an IAM policy and...