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Node AWS Lambda Example Hello World

Setup

Node

  1. Install nvm (Node Version Manager)
  2. cd to the project directory and execute the following: 
    nvm install
nvm use
npm install

IDE Setup

This project uses EditorConfig for IDE configuration.

See .editorconfig for settings.

Many popular IDEs and editors support this out of the box or with a plugin.

AWS

  1. Install AWS CLI for your computer
  2. Setup AWS CLI with your credentials
  3. Add a configuration for serverless in your AWS config files

Domain Name

  1. Follow the instructions at serverless-domain-manager for registering and setting up a domain name
    1. Create test-api.whatever.com certificate
    2. Create api.whatever.com certificate
  2. Change the base custom.baseDomainName property in serverless.yml to the zone name, eg whatever.com
  3. Then run: 
    npx serverless create_domain --stage test

Development

Invoking locally

Use serverless to run the server locally:

npx serverless invoke local -f helloWorld -p examples/invoke-data/queryHello.json

Running as a server

AWS_SDK_LOAD_CONFIG=true npx serverless offline

Invoking against test

Use serverless to run the server against the test environment:

npx serverless invoke --stage test -f helloWorld -p examples/invoke-data/postHello.json

Prettier

This project uses Prettier, so please run it before checking in:

npm run pretty

See .prettierrc for settings.

Some IDEs and editors have plugins for running Prettier.

Linting

This project uses ESLint. Check linting before checking in:

npm run lint

See tslint.json for settings.

Many IDEs and editors support TSLint.

Testing

This project uses Jest for testing. Run tests before checking in.

npm test

Building

npm run build

Deploy

NOTE: AWS Certificate validation requires a manual step during the first deployment.

When the following is displayed, go to the AWS Certificate Manager console for the new domain name and create the record in Route 53:

CloudFormation - CREATE_IN_PROGRESS - AWS::CertificateManager::Certificate - WebAppCertificate

Test

npm run deploy

Checking logs

npx serverless logs --stage test -t -f helloWorld

Production

npm run deploy:prod

Checking logs

npx serverless logs --stage prod -t -f helloWorld

Troubleshooting

If there are errors when deploying, check the Cloudformation logs for the stack.