lambda-hook-proxy

A simple lambda (nodejs) script to forward API POST calls to a private subnet

Requirements

• API Gateway and AWS lambda
• request and request-debug npm modules

AWS Lambda Setup

1. Create an AWS Lambda function
2. Ensure the Lambda function is tied to a VPC and subnet a. this is required in order to communicate with the private subnet
3. Download the request and request-debug npm modules and save them to this directory a. npm install --prefix=[directory] aws-sdk
4. zip the directory zip -r [name].zip * and upload it to Lambda
5. Create an Environment Variable call ENDPOINT and for the value enter the address to forward the HTTP requests in the private subnet

AWS Gateway Setup

1. Make sure the Lambda function is tied to an API Gateway (navigate to Triggers in Lambda) a. you may need to create a new API
2. Create a Resource and then under actions click create method to create a POST methos
3. In the Method Execution menu, under Integration Request click Use Lambda Proxy Integration
4. Deploy the API and test it

Resources

• https://aws.amazon.com/blogs/compute/using-api-gateway-with-vpc-endpoints-via-aws-lambda/
• http://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-set-up-simple-proxy.html