Project Description

This project involves developing a serverless application using AWS Lambda for backend logic, API Gateway for creating a RESTful API, and DynamoDB for data storage. Terraform scripts are used to manage the serverless infrastructure, and CloudWatch is set up for monitoring and logging.

Technologies Used

Terraform
AWS Lambda
AWS API Gateway
AWS CloudWatch
AWS DynamoDB

Key Features

Serverless Architecture
User Authentication and Security
Real-Time Data Processing
Monitoring and Logging

Project Steps

Copy the Folder Locally and Install Dependencies

We start with the project locally, so you have to copy the folder to your computer. First, we install the dependencies for the Lambda function:

lambda_function
npm init -y
npm install @aws-sdk/client-dynamodb @aws-sdk/lib-dynamodb

Zip the Lambda Function Code

We go back to the serverless-app directory and zip the lambda_function directory:

cd ..
zip -r lambda_function_payload.zip lambda_function/

Deploy the Infrastructure

Initialize and apply your Terraform configuration:

terraform init
terraform apply

Test the API

Click on the link displayed by the Outputs. The response you will get after you click on the link is [] and it means your API is working correctly. This is an empty array being returned because there are no items in your DynamoDB table. To verify everything is working, you have to add a test item to your DynamoDB table.

Results

The API is successfully:

Connecting to DynamoDB
Running the scan operation
Returning the results
Handling CORS correctly

Serverless Application with AWS Lambda and API Gateway