This is a web application Bill Management system built with spring boot and deployed on AWS

• EC2 instances are built on a custom AMI using packer
• Setting up the network and creation of resources is automated with Cloud formation, aws cli and shell scripts
• Instances are autoscaled with ELB to handle the web traffic
• Created a serverless application to facilitate "pending bills email" using SES and SNS
• The application is deployed with Circle CI and AWS Code Deploy

• Create the networking setup using cloud formation and aws cli
• Create the required IAM policies and users
• Setup Load Balancers, Route53, DynamoDB, SNS, SES, RDS, WAF

• The Bill Management System Web application is developed using Python Flask framework that uses the REST architecture
• Secured the application with Basic Authentication Security to retrieve user information
• Created pip3 dependencies to run the app locally and when deployed on AWS
• Storing the images of Bill and invoices in S3
• Generating Pre-signed URL using BOTO3 to with expiration of 60 minutes

Pre-Requisites: Need to have postman installed

• Clone this repository into the local system
• Go to the folder /webapp
• Download all pip dependencies by running "pip3 install -r requirements.txt"
• Run WebappApplication by typing python3 views.py or user forever manager to run it in backgroung

• Used python unittest and junit for load testing test case.
• Run WebappApplication test cases: python3 -m unittest test_app.py

• Created a webhook from github to CircleCI
• Bootstrapped the docker container in CircleCI to run the unit tests, integration tests and generate the artifact
• The artifact generated is stored S3 bucket and deployed to an autoscaling group.

• Created auto scaling groups to scale to the application to handle the webtraffic and keep the costs low when traffic is low
• Created cloud watch alarms to scale up and scale down the EC2 instances

• Created a pub/sub system with SNS and lambda function
• When the user request for a list of url to view pending bills within span of "c" days, send message is published to the SNS topic.
• The lambda function checks for the entry of the emails in DynamoDB if it has no entry then it inserts a record with a TTL of 15 minutes and sends the notification to the user with SES ![alt text]

• Implemented CI to build out an AMI and share it between organization on AWS
• Created provisioners and bootstrapped the EC2 instance with required tools like FLASK, cloudformation, Python