Serverless Web Application with approval in Step function on AWS. Alexa Skill to check status.

A Serverless AWS app with step function approval workflow. It utilizes a fully serverless architecture:

• Cognito User Pools for authentication, registration, and confirmation
• Step Function for workflow approval
• AWS ML for prediction
• API Gateway for REST API authenticated with Cognito User Pools
• Lambda and DynamoDB as a Backend
• CloudFormation and SAM for Infrastructure management

AWS Architecture Diagram

AWS Architecture

Amazon Machine Learning is used to predict the appropriate quote for the user according to previously approved quotes. The CSV file containing the previously approved quotes is stored in an Amazon S3 bucket which is loaded into Amazon Machine Learning. Then, Amazon Machine Learning performs the Real-Time Bayesian prediction algorithm using the previously approved quotes and displays the result of the prediction to the screen.
AWS ML Diagram

CICD Diagram

Application Highlights

• Online Quote submission capability
• Quote approval workflow in cloud
• Email approval
• Alexa Support
• Price prediction using ML
• Reporting Dashboard using AWS QuickSight
• SSO – Amazon Cognito
• CICD

Prerequisites

You need to install following on your computer or in cloud.

• Git
• Visual Studio Code
• Node.js (with NPM)
• Bower
• AWS CLI
• Ember CLI
• AWS account

Installation

• git clone
• cd client
• npm install && bower install

Creating the AWS Infrastructure

Set up AWS infra

Running / Development

• ember serve
• Visit your app at http://localhost:4200.

Code Generators

Make use of the many generators for code, try ember help generate for more details

Running Tests

• ember test
• ember test --server

Building

• ember build (development)
• ember build --environment production (production)

Web Application Deployment

Build the ember web app and copy /AWSProjects/aws-serverless-ember/client/dist files to S3, note you'll need the "WebsiteBucket" output value from the above hosting cloudformation stack you generated. If you need it again, just run aws cloudformation describe-stacks --stack-name ember-serverless-hosting *if you used a different name, substitute that in-place of "ember-serverless-hosting", then note the OutputValue for "WebsiteBucket" and use that here:

cd client
ember build
aws s3 sync dist/ s3://<<your-ember-website-bucket>>/ -acl public-read

Once synced you can visit the URL for your S3 bucket using the OutputValue from the hosting template for WebsiteURL. Note: For same folder structure in S3 you can drag folder to s3.

References

• ember.js
• ember-cli
• aws-cli
• Development Browser Extensions
  • ember inspector for chrome
  • ember inspector for firefox

Thank You
Manoj Kumar