API Gateway Configuration

This module configures API Gateway to expose Lambda functions as REST APIs.

Overview

The API Gateway configuration includes:

• REST API setup
• Lambda integration
• CORS configuration
• CloudWatch logging
• Stage deployment

Architecture

Client → API Gateway → Lambda Function → Response

Configuration

The API Gateway is configured to:

• Accept all HTTP methods (GET, POST, PUT, DELETE, etc.)
• Route all paths to the Lambda function
• Enable CORS for browser access
• Log requests to CloudWatch

Testing

Using curl

# Get API URL from outputs
API_URL=$(terraform output -raw api_gateway_url)

# Test GET request
curl $API_URL/test

# Test POST request
curl -X POST $API_URL/test \
  -H "Content-Type: application/json" \
  -d '{"key": "value"}'

Using AWS CLI

# Get API ID
API_ID=$(terraform output -raw api_id)

# Test API
aws apigateway test-invoke-method \
  --rest-api-id $API_ID \
  --resource-id <resource-id> \
  --http-method GET

Monitoring

View API Gateway logs:

aws logs tail /aws/apigateway/devops-studio-dev-api --follow

Best Practices

1. Use Stages - Separate dev, staging, prod
2. Enable Logging - Monitor API usage
3. Set Throttling - Prevent abuse
4. Use API Keys - For authentication (if needed)
5. Enable CORS - For browser access