Finance Dashboard

This project is indented to be used as a demo during virtual classrooms. It demonstrates concepts such as a serverless architecture, DynamoDB table design, and usage of the Cloud Development Kit.

Architecture

This project uses Amazon CloudFront, Amazon S3, ACM, API Gateway, AWS Lambda, Amazon DynamoDB, and Amazon CloudWatch Event Rules.

Serverless

One of the benefits of serverless is that you can run small (demo) website very cost effectively. These are the different pricing metrics for this application:

Metric	Cost	Unit
S3 TimedStorage-ByteHrs	$0.0245	per GB-month
S3 Requests-Tier2	$0.0043	per 10,000 GET requests
CloudFront Requests-Tier2-HTTPS	$0.0120	per 10,000 HTTPS requests
CloudFront Bandwith	$0.0850	per GB
DynamoDB TimedStorage-ByteHrs	$0.3060	per GB-month
DynamoDB PayPerRequestThroughput	$0.3050	per 1M read requests
Lambda Lambda-GB-Second	$0.1667	per 10,000 GB-second
Lambda Request	$0.2000	per 1M requests
ApiGatewayRequest	$3.7000	per 1M requests

For this calculation, let's assume the static website is 6 KB and the data in DynamoDB is 2.5 MB. And let's also assume that each visitor loads the static content once and makes 5 API requests on average (with each request transferring an average of 60 items, totaling 2 KB).

The total price of storage in S3 and DynamoDB is approximately $0.0008 per month. On top of that there is a price per request. The combined price for API Gateway, S3, CloudFront, DynamoDB and Data Transfer is approximately $0.3347 per 10,000 visitors. That means that this web application can serve one million visitors for less than $35 and anything less than 300 visitors is less than $0.01 and likely will be free.

* All prices are based on eu-central-1 and do not include the AWS Free Tier

Live environment

A live environment can be found at finance.demo.training.

Setup

It is recommended to setup an CDK project in a Python virtual environment. This can easily be done with venv.

python3 -m venv .venv

To activate the virtual environment

source .venv/bin/activate

To install CDK libraries:

pip install -r cdk/requirements.txt

To download the dependencies for the Lambda Layers:

cd src/yfinance/python/
pip install -r requirements.txt -t .

cd src/xray/python
pip install -r requirements.txt -t .

To deploy the CDK template:

cdk deploy