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aws-lambda-starter

Starting point / boilerplate for node.js based AWS Lambda projects - includes create, deploy, invoke scripts as well as unit tests! Unit tests are in Jasmine right now but switching over to mocha or something else would be trivial.

Getting Started

NOTE: Tests get ran by default before you create or deploy your lambda. See build.sh and the scripts in provisioning/. Also, all commands are run under the Lambda name myLambda. You can change the name in package.json - unfortunately you have to change it in 3 spots until TODO #1 gets done.

Prerequisites

  1. AWS CLI
  2. Execution Role ARN for your Lambda

To run tests you'll want to install jasmine and watch globally npm install -g jasmine watch

Then you can run tests while watching files for changes: npm run test:watch

If you want to ignore the tests during builds/deploys you can comment out the npm test line in build.sh

Setup

  1. Clone repo git clone https://github.com/ryanray/aws-lambda-starter your-project-name
  2. Create config.json file based on config.sample.json. This file is gitignored by default because this is where you would put any api key's and other secret info that your lambda may need.
  3. Make sure you can run the tests npm test
  4. If you want to change the name of the lambda change myLambda in package.json

Execution Role ARN(Amazon Resource Name)

Before you can create your Lambda you need to create an execution role. If you did any of the Lambda hello world tutorials in the AWS console you should already have a role created. Either way you need to goto the AWS Console -> Security & Identity -> IAM -> Roles. Get the ARN of lambda_basic_execution or create a new role based on role.example.json and get the ARN from that. The full ARN looks something like arn:aws:iam::YOUR_ACCOUNT_ID:role/lambda_basic_execution.

Create Your Lambda

Run the create lambda script to create the Lambda via AWS Cli. This example creates a Lambda named "myLambda". From the project root dir run npm run create arn:aws:iam::YOUR_ACCOUNT_ID:role/lambda_basic_execution

Test Your Deployed Lambda

Now that your lambda is live you can invoke it! npm run invoke {\"type\": \"sweet\"} or test the error state without a type npm run invoke {}

Test Your Lambda Locally

You can "invoke" your lambda before you deploy it by running npm run localInvoke. This will invoke your Lambda using the mock event data in provisioning/localEvent.json and output the results in the console.

Deploy changes

After making some changes you'll probably want to deploy them... npm run deploy

Contributing

Improvements are welcome! Just fork, push your changes to a new branch, and create a pull request!

TODO

  1. get lambda name from config.json so you don't have to always pass it in to the commands

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starting point for AWS Lambda projects

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