🚀 Deployment Status

✅ Completed Infrastructure

VPC Module

• Multi-AZ deployment across us-east-1a and us-east-1b
• Public subnets for load balancers and NAT gateways
• Private subnets for secure application and database hosting
• Internet Gateway and NAT Gateways for controlled internet access
• Proper routing tables and security groups

Network Details:

• VPC CIDR: 10.0.0.0/16
• Public Subnets: 10.0.0.0/24, 10.0.1.0/24
• Private Subnets: 10.0.2.0/24, 10.0.3.0/24

RDS Module

• PostgreSQL 16 (latest version)
• Cost-optimized configuration (db.t3.micro, single AZ for dev)
• Encrypted storage with automatic backups
• AWS Secrets Manager integration for secure credentials
• Performance Insights enabled (7-day free retention)
• CloudWatch logs integration
• VPC security groups for network isolation

Database Features:

• Engine: PostgreSQL 16
• Instance: db.t3.micro (Free Tier eligible)
• Storage: 20GB GP2 with auto-scaling up to 100GB
• Backups: 7-day retention
• Monitoring: Performance Insights + CloudWatch

ECS Module ✅

• ECS Fargate Cluster: Serverless container orchestration platform
• Application Load Balancer: Public internet access with multi-AZ distribution
• Auto-scaling: CPU (70%) and Memory (80%) based scaling (1-3 tasks)
• Container Platform: Currently running nginx:latest for testing
• Security Integration: Secure database connectivity via Secrets Manager
• Monitoring: CloudWatch Container Insights and detailed logging
• Health Checks: Multi-AZ health monitoring and traffic distribution

Container Platform Features:

• Cluster: backend-infrastructure-dev-cluster
• Service: backend-api with Fargate deployment
• Resources: 0.25 vCPU, 512MB RAM per container (cost-optimized)
• Public URL: Live and serving traffic
• Auto-scaling: Active monitoring with CloudWatch alarms
• Logs: Streaming to /ecs/backend-infrastructure-dev-backend-api

📋 Planned Infrastructure

• Jenkins Module: CI/CD automation and container deployment pipeline
• Monitoring Module: Prometheus + Grafana observability stack
• SSL/HTTPS: Certificate management and secure endpoints# Backend Infrastructure Terraform

Infrastructure as Code for backend services using Terraform on AWS.

🏗️ Architecture Overview

Modern, scalable backend infrastructure built with Terraform modules for maximum reusability across environments.

🛠️ Technology Stack

• Infrastructure: Terraform
• Containerization: Docker + ECS
• Database: PostgreSQL (RDS)
• CI/CD: Jenkins
• Monitoring: Prometheus + Grafana
• Security: AWS Secrets Manager, VPC isolation

📁 Project Structure

terraform/
├── environments/
│   ├── dev/           # Development environment
│   ├── staging/       # Staging environment (planned)
│   └── prod/          # Production environment (planned)
└── modules/
    ├── vpc/           # ✅ Network foundation
    ├── rds/           # ✅ PostgreSQL database
    ├── ecs/           # 🔄 Container platform (next)
    ├── monitoring/    # 📋 Prometheus + Grafana (planned)
    └── jenkins/       # 📋 CI/CD pipeline (planned)

🚀 Deployment Status

✅ Completed Infrastructure

VPC Module

• Multi-AZ deployment across us-east-1a and us-east-1b
• Public subnets for load balancers and NAT gateways
• Private subnets for secure application and database hosting
• Internet Gateway and NAT Gateways for controlled internet access
• Proper routing tables and security groups

Network Details:

• VPC CIDR: 10.0.0.0/16
• Public Subnets: 10.0.0.0/24, 10.0.1.0/24
• Private Subnets: 10.0.2.0/24, 10.0.3.0/24

RDS Module

• PostgreSQL 16 (latest version)
• Cost-optimized configuration (db.t3.micro, single AZ for dev)
• Encrypted storage with automatic backups
• AWS Secrets Manager integration for secure credentials
• Performance Insights enabled (7-day free retention)
• CloudWatch logs integration
• VPC security groups for network isolation

Database Features:

• Engine: PostgreSQL 16
• Instance: db.t3.micro (Free Tier eligible)
• Storage: 20GB GP2 with auto-scaling up to 100GB
• Backups: 7-day retention
• Monitoring: Performance Insights + CloudWatch

📋 Planned Infrastructure

• Jenkins Module: CI/CD automation and container deployment pipeline
• Monitoring Module: Prometheus + Grafana observability stack
• SSL/HTTPS: Certificate management and secure endpoints

🚀 Getting Started

Prerequisites

• AWS CLI configured with appropriate permissions
• Terraform >= 1.0 installed
• Git for version control

Quick Start

1. Clone the repository

   git clone <repository-url>
   cd backend-infrastructure-terraform

2. Deploy Development Environment

   cd terraform/environments/dev
   terraform init
   terraform plan
   terraform apply

3. Verify Deployment

   • Check AWS Console for VPC and RDS resources
   • Verify database connectivity from private subnets
   • Review Secrets Manager for database credentials

Environment Configuration

Each environment (dev, staging, prod) has its own:

• Terraform state file (isolated deployments)
• Variable configurations
• Resource sizing and settings

Development Environment:

• Cost-optimized settings
• Single AZ deployment
• Minimal resource allocation
• Enhanced logging for debugging

🔒 Security Features

• Network Isolation: Private subnets for sensitive resources
• Encrypted Storage: All RDS volumes encrypted at rest
• Secrets Management: Database credentials in AWS Secrets Manager
• Security Groups: Restrictive ingress/egress rules
• IAM: Least privilege access patterns

📊 Monitoring & Observability

Currently Enabled:

• RDS Performance Insights (7-day retention)
• PostgreSQL query logs in CloudWatch
• Infrastructure metrics and alarms
• VPC Flow Logs for network analysis

Planned:

• Prometheus metrics collection
• Grafana dashboards
• Application-level monitoring
• Log aggregation and analysis

💰 Cost Optimization

Development Environment:

• Free Tier eligible resources where possible
• Single AZ deployment for non-critical workloads
• Right-sized instances (t3.micro for RDS)
• Efficient storage allocation with auto-scaling

Estimated Monthly Cost (Dev):

• RDS db.t3.micro: ~$12-15
• NAT Gateways: ~$32-45
• EBS Storage: ~$2-4
• Total: ~$50-65/month

🏃‍♂️ Next Steps

1. Deploy Your Own Application

   • Replace nginx with your custom Docker image
   • Configure application-specific environment variables
   • Set up proper health check endpoints

2. Add SSL/HTTPS Support

   • Certificate Manager integration
   • HTTPS listener configuration
   • Security headers and best practices

3. CI/CD Pipeline (Jenkins Module)

   • Automated container builds and deployments
   • Integration with container registry
   • Blue/green deployment strategies

🤝 Contributing

1. Create feature branches for new modules
2. Test in development environment first
3. Document all variables and outputs
4. Follow Terraform best practices
5. Update README with changes

📖 Module Documentation

VPC Module

• Location: terraform/modules/vpc/
• Purpose: Network foundation with public/private subnet architecture
• Outputs: VPC ID, subnet IDs, gateway IDs for other modules

RDS Module

• Location: terraform/modules/rds/
• Purpose: Managed PostgreSQL database with security best practices
• Outputs: Database endpoint, credentials ARN, security group ID

🆘 Troubleshooting

Common Issues

1. State Lock Errors

   terraform force-unlock <lock-id>

2. Module Not Found

   terraform init

3. RDS Version Issues

   • Check AWS documentation for supported PostgreSQL versions
   • Update engine_version variable accordingly

Getting Help

• Check AWS CloudWatch logs for detailed error messages
• Review Terraform state for resource dependencies
• Use terraform plan to preview changes before applying

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Infrastructure Status: Production-Ready Container Platform ✅
Public URL: Live and serving traffic 🌐
Next Milestone: CI/CD Pipeline (Jenkins) 🎯
Last Updated: July 2025