Expert AWS Development

Deploying with AWS SAM and AWS CloudFormation

In this section, we will create a simple serverless application, which consists of a single function. It will return Amazon S3 bucket name that is specified as an environment variable.

Create the index.js file with the following code:

var AWS = require('aws-sdk'); exports.handler = function(event, context, callback) {   var bucketName = process.env.S3_BUCKET;   callback(null, bucketName); }

Create the packt.yaml file with the following code:

AWSTemplateFormatVersion: '2010-09-09'Transform: AWS::Serverless-2016-10-31Resources:  PacktFunction:    Type: AWS::Serverless::Function    Properties:      Handler: index.handler      Runtime: nodejs6.10      Environment:        Variables:           S3_BUCKET: packtdemo

Create the packt_app folder ...