AWS lambda example

This project is an example of using AWS serverless infrastructure to create a three tier application. It uses DynamoDB as it’s backend store, lambda as the mechanism of pulling data from a 3rd party API and then exposed via an API gateway.

There is also an S3 bucket hosting a static webpage that consumes the lambda api, and that can be found here: https://richards-lambda-test-qa.s3.eu-west-2.amazonaws.com/index.html

Setup

To run this locally you will need Ruby 2.5.x and Terraform 0.11.x. I use asdf version manager for this. But you can use any version or package manager you prefer.

You will also need to install the AWS SAM cli

Deployment

Run terraform apply -var-file="$HOME/.aws.tfvars" to create the S3 buckets and DynamoDB table.

Then follow the deploy guide in the [Useful resources](# Useful resources)

TODO

• Remove remaining references to initial project idea (park-run)
• Work out how to inject secrets into the lambda
• Have diffent CORS policy for local and production enviorment
• Add DNS via Route 53
• Add Cloudfront distribution for the static site
• Redo and TDD the Ruby lambda

Useful resources

• AWS Tutorial: Deploying a Hello World Application
• Scheduling Lambda Functions