Book Image

Building Serverless Architectures

By : Cagatay Gurturk
Book Image

Building Serverless Architectures

By: Cagatay Gurturk

Overview of this book

Over the past years, all kind of companies from start-ups to giant enterprises started their move to public cloud providers in order to save their costs and reduce the operation effort needed to keep their shops open. Now it is even possible to craft a complex software system consisting of many independent micro-functions that will run only when they are needed without needing to maintain individual servers. The focus of this book is to design serverless architectures, and weigh the advantages and disadvantages of this approach, along with decision factors to consider. You will learn how to design a serverless application, get to know that key points of services that serverless applications are based on, and known issues and solutions. The book addresses key challenges such as how to slice out the core functionality of the software to be distributed in different cloud services and cloud functions. It covers basic and advanced usage of these services, testing and securing the serverless software, automating deployment, and more. By the end of the book, you will be equipped with knowledge of new tools and techniques to keep up with this evolution in the IT industry.
Table of Contents (10 chapters)

Setting up API Gateway

In this section, we will start with extending our CloudFormation template.

First of all, we should start with some boilerplate. In the previous chapter, we had mentioned CloudWatch Logs, the service that AWS provides to store logs in a central place. API Gateway also uses CloudWatch to store HTTP logs and, like all services that try to access to other services, needs an IAM role. In this IAM role, we should give access to the service to access the CloudWatch logs and deliver this role to API Gateway as the AWS::ApiGateway::Account resource. Now let's open our CloudFormation template and just prepend these lines to the Resources section:

"ApiGatewayCloudwatchRole": { 
      "Type": "AWS::IAM::Role", 
      "Properties": { 
        "AssumeRolePolicyDocument": {