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AWS Lambda Deployment Guide

Prerequisites

Before deploying, ensure you have the following:

  • AWS Account with access to AWS Lambda and API Gateway, as well as with necessary IAM Role Permissions.
  • AWS CLI installed and configured (aws configure).
  • Yarn installed (npm install -g yarn).
  • API Gateway configured to trigger the Lambda function.

Test Running Locally

You can test the Lambda function locally before deployment using yarn lambda:dev, Then install all necessary packages using yarn install.

Deploying to AWS (using AWS Website)

  1. Go to the AWS Lambda Console: https://console.aws.amazon.com/lambda
  2. Log in your AWS account.
  3. Create a function by selecting 'Author from scratch', entering a function name, and selecting runtime.
  4. Upload your FunctionCode.zip.
  5. Click Deploy.
  6. Go to Configuration -> Triggers.
  7. Select 'API Gateway' and choose to create a new API.
  8. Set Deployment Stage then click 'Add'.
  9. Go to your API -> Stages -> YOUR_DEPLOYMENT_STAGE.
  10. Copy and paste the Invoke URL to your browser to test.

Deploying to AWS (using AWS CLI)

  1. Zip your Lambda Function Code.

  2. Deploy the Lambda Function by running the following command to create the function:. aws lambda create-function --function-name <YOUR_FUNCTION> \

  3. Create an API Gateway: aws apigateway create-rest-api --name <YOUR_API_NAME>

  4. Get the Root Resource ID of the new API: aws apigateway get-resources --rest-api-id <API_ID>

  5. Create a new resource in the API Gateway: aws apigateway create-resource --rest-api-id <API_ID> \

  6. Create a GET method that triggers Lambda: aws apigateway put-method --rest-api-id <API_ID> \

  7. Link the method to the Lambda Function: aws apigateway put-integration --rest-api-id <API_ID> \

  8. Deploy the API Gateway and get the Invoke URL: aws apigateway create-deployment --rest-api-id <API_ID> \

  9. Allow API Gateway to invoke your Lambda Function: aws lambda add-permission --function-name <YOUR_FUNCTION> \

  10. Update the function code for later use by running this code: aws lambda update-function-code --function-name <YOUR_FUNCTION> \

  11. Verify the deployment using this code: aws lambda invoke --function-name <YOUR_FUNCTION> output.txt OR: curl -X POST "https://<API_ID>.execute-api.<REGION>.amazonaws.com/prod/lambda"