AWS Starter App

Production-ready AWS infrastructure using Terraform with modular architecture and environment-specific configurations.

Architecture Overview

Modular Design: Each numbered directory represents a deployable unit with proper dependency ordering.

Environment Isolation: Separate configurations in infra/environments/prod/ with dedicated state management.

Configurable Modules: Following standardized pattern with comprehensive variables, remote state integration, and production defaults.

Module Status

✅ Production Ready & Deployed

• 01_cognito: User authentication with Cognito User Pool
• 02_network: VPC with multi-AZ subnets and IPv6 support
• 06_sqs: Message queuing with DLQ and comprehensive policies
• 07_lambda: SQS processing with flexible integration patterns

✅ Refactored to Environment Pattern

• 03_rds: PostgreSQL database with encryption and configurable sizing
• 04_ec2: Application servers with configurable instance types and storage
• 04a_ec2_alb: ALB integration for EC2 instances with path-based routing
• 10_ecs: Standalone ECS service with Fargate (single-task, direct IP)
• 10a_ecs_alb: ECS ALB integration for high availability and load balancing

🔄 Available Modules (Pending Environment Testing)

• 02a_alb: Application Load Balancer with SSL/TLS
• 05_ec2_rds: Database connectivity and security groups
• 08_commons: Shared security, logging, and storage
• 09_svc_user: External service access with IAM

Infrastructure Status

✅ Completed

• SQS module with environment deployment and testing
• Lambda module with flexible SQS integration (ARN, lookup, remote state)
• End-to-end SQS→Lambda message processing verified
• IAM terraform_user policies reorganized (10 service-specific policies)
• All infrastructure follows engineering standards and best practices

🔄 Next Steps: Production Environment Completion

Phase 1: Core Infrastructure

• Deploy ALB environment (02a_alb)
• Deploy EC2-RDS connectivity (05_ec2_rds)
• Deploy Commons module (08_commons)
• Deploy Service Users (09_svc_user)

Phase 2: Integration Testing

• End-to-end application deployment test
• Database connectivity validation
• Load balancer health checks
• Message processing workflow testing

Phase 3: Monitoring & Operations

• CloudWatch dashboards and alerts
• Log aggregation and analysis
• Backup and disaster recovery procedures
• Performance optimization and cost analysis

Recent Accomplishments

SQS-Lambda Integration

• Flexible Architecture: Lambda supports direct ARN, name lookup, or remote state integration
• Production Deployment: Main queue + DLQ with proper policies and event source mapping
• Verified Processing: 1-2ms message processing latency with comprehensive logging
• Standards Compliance: All modules follow file organization, naming, and Terraform standards

IAM Policy Optimization

• Service Separation: Split 549-line policy into 10 focused service policies
• AWS Limit Compliance: Exactly 10 policies (AWS maximum) with zero functionality loss
• Enhanced Security: Combined KMS+Secrets Manager, EC2+ECS+ECR logical groupings
• Maintainability: Clear separation of concerns for debugging and reviews

Deployment Process

Prerequisites

1. Deploy 00_ops_foundation/00_state_bucket (root credentials)
2. Deploy 00_ops_foundation/01_terraform_user (root credentials)
3. Switch to terraform-user credentials for all subsequent operations

Environment Deployment

cd infra/environments/prod/{module_name}
terraform init
terraform plan
terraform apply

Dependency Order

1. ✅ Authentication (Cognito)
2. ✅ Network (VPC, Subnets)
3. 🔄 Load Balancer (ALB)
4. ✅ Database (RDS) - Module refactored, environment ready
5. ✅ Compute (EC2) - Module refactored, environment ready
6. ✅ ALB Integration (EC2-ALB) - Separated module for clean architecture
7. 🔄 Connectivity (EC2-RDS)
8. ✅ Messaging (SQS)
9. ✅ Serverless (Lambda)
10. 🔄 Commons (Security, Logging)
11. ✅ Container Service (ECS) - Standalone module ready
12. ✅ Container ALB (ECS-ALB) - ALB integration module ready
13. 🔄 Service Users (External Access)

Development

Follow guidelines in .cursorrules for infrastructure standards, security practices, and deployment procedures.