Simply CDK stack template with CI / CD pipeline on CircleCI.

We can do...

• Create two CloudFront Function (viewer-request / viewer-response )
• Customize these function config by using AWS CDK (TypeScript)
• Deploy functions by AWS CDK CLI
• Execute E2E test using AWS SDK and Jest
• Publish function using npm-script
• Automate these tasks on CircleCI

% git clone git@github.com:digitalcube/cloudfront-functions-template.git
% cd cloudfront-functions-template
% yarn

We need to complete the AWS CLI initialization before using AWS CDK.
We can learn about it by the document.

https://docs.aws.amazon.com/cdk/latest/guide/getting_started.html#getting_started_prerequisites

We need to set these environment variables before starting the CircleCI job.

• AWS_ACCESS_KEY_ID: IAM User's access key id
• AWS_SECRET_ACCESS_KEY: IAM User's secret access key

Basically using Administrator Policy to create a user for executing AWS CDK command. But of course, we can create a new custom Policy for the stack.

The template is using these branches to deploy / test / publish CloudFront functions

• main: Production-ready branch.
• development: Testing environment.
• [another branch]: Just build/test the CDK template

• Setup project
• Execute unit test of AWS CDK stack
• Deploy the stack to AWS (as a development stage)
• Execute E2E test using jest to test the function behavior
• If pass these steps, the function will published

$ yarn test

By default these function are not publish automatically. Only deployed to the development stage.

$ yarn deploy

Call CloudFront.TestFunction API and check the response by using Jest.

$ yarn test:e2e

Publish these function

$ yarn publish-function

or

$ npx ts-node --prefer-ts-exts bin/publish_function.ts