🌐 Enterprise Multi-Region SaaS Platform on AWS

A production-grade, multi-region SaaS infrastructure deployed across AWS US-East-1 and EU-West-1 using Terraform, featuring high availability, disaster recovery, and comprehensive observability.

📋 Table of Contents

Overview
Architecture
Features
Tech Stack
Prerequisites
Project Structure
Getting Started
Module Documentation
Deployment Guide
Security
Monitoring & Observability
Disaster Recovery
Cost Optimization
Troubleshooting
Contributing
License

🎯 Overview

This repository contains enterprise-grade Infrastructure as Code (IaC) for deploying a highly available, multi-region SaaS platform on AWS. The infrastructure is designed with production best practices including:

Multi-Region Architecture: Primary region (US-East-1) with active-active failover to secondary region (EU-West-1)
Zero Trust Security: Comprehensive security controls including KMS encryption, AWS Config, GuardDuty, and Security Hub
Global Data Replication: Aurora Global Database, DynamoDB Global Tables, and S3 Cross-Region Replication
Edge Delivery: CloudFront CDN with WAF protection and AWS Global Accelerator for optimal performance
Service Mesh: AWS App Mesh for microservices communication and observability
CI/CD Pipeline: Automated Blue/Green deployments using AWS CodePipeline and CodeDeploy
Comprehensive Monitoring: CloudWatch, X-Ray, OpenSearch, Prometheus, and Grafana integration

🏗️ Architecture

High-Level Architecture Diagram

Regional Architecture

The infrastructure is deployed across two AWS regions for high availability and disaster recovery:

Primary Region (US-East-1)

✅ Multi-AZ VPC with public, private (app), and data subnets
✅ ECS Fargate clusters for containerized workloads
✅ Aurora PostgreSQL Global Database (writer instance)
✅ DynamoDB Global Tables
✅ Kinesis Data Streams and Firehose
✅ Application Load Balancer with Blue/Green deployment capability

Secondary Region (EU-West-1)

✅ Identical VPC architecture (different CIDR: 10.1.0.0/16)
✅ ECS Fargate clusters (read replicas)
✅ Aurora PostgreSQL Global Database (reader instance)
✅ DynamoDB Global Tables replica
✅ S3 Data Lake with cross-region replication

Global Services

🌍 CloudFront Distribution with origin failover
🌍 AWS Global Accelerator for TCP/UDP traffic
🌍 Route 53 with health checks
🌍 WAF v2 Web ACL
🌍 Multi-region KMS encryption

✨ Features

🔒 Security & Compliance

Encryption at Rest: Multi-region KMS keys with automatic rotation
Encryption in Transit: TLS 1.2+ enforced across all services
Network Isolation: Private subnets for application and data tiers
VPC Endpoints: Interface and Gateway endpoints to avoid internet egress
AWS Config: Continuous compliance monitoring
GuardDuty: Intelligent threat detection
Security Hub: Centralized security findings aggregation
Secrets Management: AWS Secrets Manager with cross-region replication

🚀 High Availability & Resilience

Multi-AZ Deployment: All stateful services deployed across 2+ AZs
Auto-Scaling: CPU/Memory-based scaling for ECS services
Global Database: Aurora Global Database with <1s RPO and <1m RTO
CDN Failover: Automatic CloudFront origin group failover
Health Checks: ALB, Route 53, and application-level health monitoring
Blue/Green Deployments: Zero-downtime deployments via CodeDeploy

📊 Observability & Monitoring

Centralized Logging: CloudWatch Logs with retention policies
Distributed Tracing: AWS X-Ray integration in all services
Metrics & Dashboards: Amazon Managed Prometheus and Grafana
Log Analytics: OpenSearch for log search and analysis
Application Insights: ECS Container Insights enabled
Custom Alarms: SNS-based alerting for critical metrics

🔄 Data Pipeline

Stream Processing: Kinesis Data Streams for real-time ingestion
ETL: Kinesis Firehose with Lambda transformations
Data Lake: Versioned S3 buckets with lifecycle policies
Event-Driven: EventBridge for decoupled event processing
Queue Management: SQS with Dead Letter Queues

🛠️ DevOps & Automation

Infrastructure as Code: 100% Terraform, modular design
CI/CD Pipeline: Multi-region CodePipeline with parallel deployments
Container Registry: ECR with image scanning enabled
Service Mesh: AWS App Mesh for traffic management
GitOps Ready: Structured for GitOps workflows

🛠️ Tech Stack

Infrastructure

IaC: Terraform 1.6+
Cloud Provider: AWS (Multi-Region)
Networking: VPC, Transit Gateway, PrivateLink
Container Orchestration: ECS Fargate

Compute & Services

Application Runtime: Docker containers on ECS
Serverless: Lambda functions for event processing
Service Mesh: AWS App Mesh with Envoy proxy
Load Balancing: Application Load Balancer (ALB)

Data & Storage

Relational Database: Aurora PostgreSQL (Global)
NoSQL Database: DynamoDB (Global Tables)
Object Storage: S3 with Cross-Region Replication
Streaming: Kinesis Data Streams & Firehose
Caching: ElastiCache (optional, can be added)

Security & Identity

Encryption: AWS KMS (Multi-Region Keys)
Secrets: AWS Secrets Manager
Threat Detection: GuardDuty, Security Hub
Compliance: AWS Config, CloudTrail

Observability

Logging: CloudWatch Logs, OpenSearch
Metrics: CloudWatch, Prometheus (AMP)
Tracing: AWS X-Ray
Visualization: Grafana (AMG)
Alerting: SNS, CloudWatch Alarms

Edge & CDN

CDN: CloudFront with origin failover
Acceleration: AWS Global Accelerator
DNS: Route 53 with health-based routing
Security: WAF v2 with managed rules

📋 Prerequisites

Before deploying this infrastructure, ensure you have:

Required Tools

# Terraform
terraform >= 1.6.0

# AWS CLI
aws-cli >= 2.x

# Git
git >= 2.x

AWS Account Requirements

✅ AWS Account with appropriate permissions
✅ Programmatic access (Access Key ID and Secret Access Key)
✅ Permissions to create resources in us-east-1 and eu-west-1
✅ Service quotas verified (VPCs, EIPs, NAT Gateways, etc.)

Infrastructure Prerequisites

S3 Backend Bucket: Create before running Terraform

aws s3 mb s3://acme-terraform-state-prod-1 --region us-east-1
aws s3api put-bucket-versioning \
  --bucket acme-terraform-state-prod-1 \
  --versioning-configuration Status=Enabled

DynamoDB Lock Table: For state locking

aws dynamodb create-table \
  --table-name acme-terraform-locks-prod-1 \
  --attribute-definitions AttributeName=LockID,AttributeType=S \
  --key-schema AttributeName=LockID,KeyType=HASH \
  --billing-mode PAY_PER_REQUEST \
  --region us-east-1

Container Images: Build and push to ECR

# Authenticate to ECR
aws ecr get-login-password --region us-east-1 | \
  docker login --username AWS --password-stdin 123456789012.dkr.ecr.us-east-1.amazonaws.com

# Build and push your application image
docker build -t saas-api:latest .
docker tag saas-api:latest 123456789012.dkr.ecr.us-east-1.amazonaws.com/saas-api:latest
docker push 123456789012.dkr.ecr.us-east-1.amazonaws.com/saas-api:latest

📁 Project Structure

.
├── backend.tf                      # S3 backend configuration
├── providers.tf                    # AWS provider configuration (multi-region)
├── live/
│   └── prod/
│       ├── global.tf               # Global resources (Edge, Security Baseline)
│       ├── providers.tf            # Environment-specific providers
│       ├── us-east-1/
│       │   ├── main.tf             # US primary region resources
│       │   └── networking/
│       │       ├── main.tf         # VPC, subnets for US
│       │       └── outputs.tf
│       └── eu-west-1/
│           ├── main.tf             # EU secondary region resources
│           └── networking/
│               ├── main.tf         # VPC, subnets for EU
│               └── outputs.tf
│
└── modules/
    ├── networking/                 # VPC, Subnets, NAT, IGW, VPC Endpoints
    ├── compute/                    # ECS Fargate, ALB, Auto-scaling
    ├── database/                   # Aurora PostgreSQL (Regional)
    ├── database-global/            # Aurora Global Database
    ├── dynamodb-global/            # DynamoDB Global Tables
    ├── app-mesh/                   # AWS App Mesh configuration
    ├── security-baseline/          # KMS, GuardDuty, Security Hub, Config
    ├── edge/                       # CloudFront, WAF, Global Accelerator, Route53
    ├── observability/              # CloudWatch, X-Ray, OpenSearch, Prometheus, Grafana
    ├── data-pipeline/              # Kinesis, Firehose, Lambda, S3 Data Lake
    └── cicd/                       # CodePipeline, CodeBuild, CodeDeploy

Module Descriptions

Module	Purpose	Key Resources
networking	Network foundation	VPC, Subnets, NAT Gateway, Internet Gateway, VPC Endpoints
compute	Application runtime	ECS Cluster, Fargate Tasks, ALB, Target Groups, Auto-scaling
database	Regional database	Aurora PostgreSQL Cluster, Instances, Security Groups
database-global	Global database	Aurora Global Cluster, Multi-region replication
dynamodb-global	NoSQL global tables	DynamoDB with global replication
app-mesh	Service mesh	App Mesh, Virtual Nodes, Cloud Map
security-baseline	Security foundation	Multi-region KMS, GuardDuty, Security Hub, AWS Config
edge	Edge delivery	CloudFront, WAF, Global Accelerator, Route 53
observability	Monitoring stack	CloudWatch, X-Ray, OpenSearch, Prometheus, Grafana
data-pipeline	Data processing	Kinesis Streams, Firehose, Lambda, S3, EventBridge, SQS
cicd	Deployment pipeline	CodePipeline, CodeBuild, CodeDeploy

🚀 Getting Started

Step 1: Clone the Repository

git clone https://github.com/rohandeb2/terraform-aws-multi-region-saas-platform.git
cd terraform-aws-multi-region-saas-platform

Step 2: Configure AWS Credentials

# Configure AWS CLI
aws configure

# Or export environment variables
export AWS_ACCESS_KEY_ID="your-access-key"
export AWS_SECRET_ACCESS_KEY="your-secret-key"
export AWS_DEFAULT_REGION="us-east-1"

Step 3: Update Configuration Variables

Create terraform.tfvars (this file is gitignored for security):

# Update these values for your environment
name_prefix     = "acme-prod"
domain_name     = "yourdomain.com"
alert_email     = "alerts@yourdomain.com"
container_image = "123456789012.dkr.ecr.us-east-1.amazonaws.com/saas-api:latest"

# Database credentials (use Secrets Manager in production)
db_username = "admin_user"
# db_password will be auto-generated by Terraform

Step 4: Initialize Terraform

terraform init

Step 5: Plan the Deployment

terraform plan -out=tfplan

Step 6: Apply the Infrastructure

terraform apply tfplan

Step 7: Verify Deployment

# Check ECS services
aws ecs list-services --cluster acme-prod-use1-cluster --region us-east-1

# Check ALB health
aws elbv2 describe-target-health \
  --target-group-arn <target-group-arn> \
  --region us-east-1

# Test application endpoint
curl https://www.yourdomain.com/health

📚 Module Documentation

Networking Module

Location: modules/networking/

Creates a production-grade VPC with the following:

3-tier subnet architecture: Public, Private (App), Private (Data)
Multi-AZ: Resources spread across 2 availability zones
NAT Gateway: High availability with one NAT GW per AZ
VPC Endpoints: S3, DynamoDB (Gateway), ECR, Secrets Manager, CloudWatch (Interface)

Inputs:

vpc_cidr: CIDR block for VPC (e.g., "10.0.0.0/16")
name_prefix: Naming prefix for resources
endpoint_sg_id: Security group for VPC interface endpoints

Outputs:

vpc_id, public_subnet_ids, app_subnet_ids, data_subnet_ids

Compute Module

Location: modules/compute/

Deploys containerized applications on ECS Fargate:

ECS Cluster: With Container Insights enabled
Fargate Tasks: Including app container, X-Ray daemon, and Envoy sidecar
Application Load Balancer: With Blue/Green target groups
Auto-scaling: Based on CPU/Memory utilization
Service Mesh Integration: App Mesh virtual node configuration

Inputs:

container_image: ECR image URI
vpc_id, public_subnet_ids, app_subnet_ids
app_mesh_node_arn: ARN of the App Mesh virtual node
min_capacity, max_capacity: Auto-scaling bounds

Outputs:

alb_dns_name, ecs_cluster_name, ecs_service_name
blue_target_group_name, green_target_group_name
service_sg_id: Security group for ECS tasks

Database Module (Regional)

Location: modules/database/

Deploys Aurora PostgreSQL cluster:

Aurora Cluster: PostgreSQL 15.4 engine
Multi-AZ: 2 instances (1 writer, 1 reader)
Encryption: KMS encryption at rest
Backups: 7-day retention with point-in-time recovery
Performance Insights: Enabled for query analysis
Secrets Manager: Auto-generated credentials

Inputs:

vpc_id, data_subnet_ids
kms_key_arn, app_security_group_id
global_cluster_identifier: For joining global cluster (optional)

Outputs:

cluster_endpoint, reader_endpoint, secrets_manager_arn

Database Global Module

Location: modules/database-global/

Creates Aurora Global Database spanning multiple regions:

Global Cluster: Shell resource for global replication
Primary Cluster: Writer cluster in us-east-1
Secondary Cluster: Read replica in eu-west-1
Cross-Region Replication: <1 second replication lag
Disaster Recovery: Promotion capability for RTO <1 minute

Inputs:

Region-specific subnet groups, security groups, and KMS keys
master_username, master_password

Outputs:

global_cluster_id, primary_endpoint, secondary_reader_endpoint

Security Baseline Module

Location: modules/security-baseline/

Foundational security controls:

Multi-Region KMS: Primary key in us-east-1 with replica in eu-west-1
GuardDuty: Enabled in both regions
Security Hub: With findings aggregation to primary region
AWS Config: Continuous compliance recording
IAM Roles: Least-privilege auditor role

Inputs:

name_prefix, config_bucket_name, security_alerts_email

Outputs:

kms_primary_key_arn, kms_replica_key_arn
guardduty_primary_id, security_hub_aggregator_arn

Edge Module

Location: modules/edge/

Global edge delivery infrastructure:

CloudFront: Distribution with origin failover group
WAF v2: Web ACL with managed rule sets
Global Accelerator: For TCP traffic acceleration
Route 53: Health-checked DNS records
ACM Certificate: SSL/TLS for custom domain

Inputs:

us_alb_dns_name, eu_alb_dns_name (ALB endpoints)
us_alb_arn, eu_alb_arn (for Global Accelerator)
domain_name: Primary domain

Outputs:

CloudFront distribution domain name
Global Accelerator DNS name

Observability Module

Location: modules/observability/

Comprehensive monitoring and observability:

CloudWatch Logs: Centralized log aggregation
X-Ray: Distributed tracing with sampling rules
OpenSearch: Log search and analytics (2-node cluster)
Prometheus (AMP): Metrics collection workspace
Grafana (AMG): Visualization and dashboards
SNS Alerts: Email notifications for critical events

Inputs:

name_prefix, kms_key_arn, alert_email

Outputs:

prometheus_endpoint, grafana_endpoint, opensearch_endpoint

Data Pipeline Module

Location: modules/data-pipeline/

Event-driven data pipeline:

Kinesis Data Streams: Real-time data ingestion
Kinesis Firehose: Delivery to S3 with Lambda transformation
EventBridge: Custom event bus
SQS: Queue with Dead Letter Queue
S3 Data Lake: Versioned, encrypted, with cross-region replication
Lambda: Event processing functions

Inputs:

kms_key_arn, destination_bucket_arn, destination_kms_key_arn
kinesis_shards: Number of Kinesis shards

Outputs:

event_bus_arn, kinesis_stream_name, data_lake_bucket_id

CI/CD Module

Location: modules/cicd/

Automated deployment pipeline:

CodePipeline: Multi-stage pipeline with parallel regional deployments
CodeBuild: Docker image builds with ECR push
CodeDeploy: Blue/Green ECS deployments
Cross-Account: Support for separate CI/CD account
Artifact Replication: Dual-region artifact buckets

Inputs:

Repository info, ECS cluster/service names
ALB listener ARN, target group names
Cross-account role ARNs

Outputs:

pipeline_arn, codebuild_project_name

📖 Deployment Guide

Phase 1: Core Infrastructure

Deploy foundational networking and security:

# Deploy security baseline first (KMS, GuardDuty, etc.)
cd live/prod
terraform apply -target=module.security_baseline

# Deploy VPC and networking in both regions
terraform apply -target=module.vpc_us_east_1
terraform apply -target=module.vpc_eu_west_1

Phase 2: Data Layer

Deploy databases and storage:

# Deploy regional Aurora clusters
terraform apply -target=module.aurora

# Deploy DynamoDB global tables
terraform apply -target=module.dynamodb_global

# Deploy data pipeline
terraform apply -target=module.data_pipeline

Phase 3: Compute Layer

Deploy application runtime:

# Deploy ECS clusters and App Mesh
terraform apply -target=module.ecs_fargate
terraform apply -target=module.app_mesh

Phase 4: Edge & Global Services

Deploy CDN and global routing:

# Deploy CloudFront, WAF, and Global Accelerator
terraform apply -target=module.edge_stack

Phase 5: Observability

Deploy monitoring stack:

# Deploy observability infrastructure
terraform apply -target=module.observability

Phase 6: CI/CD Pipeline

Deploy automation:

# Deploy CodePipeline and CodeDeploy
terraform apply -target=module.cicd

Phase 7: Full Deployment

Apply complete infrastructure:

# Review the full plan
terraform plan

# Apply everything
terraform apply

🔒 Security

Encryption

At Rest: All data encrypted using AWS KMS with multi-region keys
In Transit: TLS 1.2+ enforced on all connections
Secrets: AWS Secrets Manager with automatic rotation

Network Security

Private Subnets: Application and data tiers isolated from internet
Security Groups: Least-privilege access rules
NACLs: Additional network layer protection (can be added)
VPC Endpoints: Eliminates internet gateway for AWS services

Identity & Access

IAM Roles: Service-specific roles with minimal permissions
No Hardcoded Credentials: All secrets in Secrets Manager
Auditing: CloudTrail enabled in all regions

Compliance & Monitoring

AWS Config: Continuous compliance monitoring
GuardDuty: ML-based threat detection
Security Hub: Aggregated security findings
Automated Alerts: SNS notifications for security events

Best Practices Implemented

✅ Deletion protection on production databases
✅ MFA delete on S3 buckets (can be enabled)
✅ Versioning on critical S3 buckets
✅ KMS key rotation enabled
✅ VPC Flow Logs (can be added)
✅ S3 bucket public access blocked
✅ Encrypted EBS volumes
✅ RDS automated backups

📊 Monitoring & Observability

CloudWatch Dashboards

Pre-configured dashboards for:

ECS service health and performance
ALB request metrics
Aurora database performance
Lambda function execution
API Gateway metrics (if added)

X-Ray Tracing

Distributed tracing enabled for:

ECS tasks (with X-Ray daemon sidecar)
Lambda functions
API calls between services

Prometheus Metrics

Available in Amazon Managed Prometheus:

Container metrics
Custom application metrics
Infrastructure metrics

Grafana Dashboards

Managed Grafana workspace with:

CloudWatch data source
Prometheus data source
X-Ray data source
Pre-built dashboards for AWS services

Log Aggregation

CloudWatch Logs: Real-time log streaming
OpenSearch: Log search and analysis with Kibana
Retention: 30-day retention on application logs

Alerting

SNS topics configured for:

High CPU/Memory utilization
Database connection pool exhaustion
ALB 5xx error rate spikes
GuardDuty findings
Security Hub critical findings

🛡️ Disaster Recovery

RTO & RPO Targets

Recovery Time Objective (RTO): < 5 minutes
Recovery Point Objective (RPO): < 1 second

Failover Strategy

Database Failover

Aurora Global Database automatic failover:

# Promote EU cluster to primary (in case of us-east-1 failure)
aws rds failover-global-cluster \
  --global-cluster-identifier acme-prod-global-db \
  --target-db-cluster-identifier acme-prod-euw1-aurora-cluster \
  --region eu-west-1

Application Failover

CloudFront automatically routes to healthy origin:

Primary origin health check fails → traffic routed to EU
Recovery is automatic, no manual intervention required

DNS Failover

Route 53 health checks monitor ALB endpoints:

Unhealthy endpoint → Route 53 removes from DNS pool
Automatic recovery when health is restored

Backup Strategy

RDS: Automated daily backups (7-day retention)
DynamoDB: Point-in-time recovery enabled
S3: Versioning enabled on all buckets
ECS: Task definitions versioned
Terraform State: S3 versioning + DynamoDB locking

Testing DR Plan

# Simulate region failure
# 1. Stop ECS tasks in us-east-1
aws ecs update-service \
  --cluster acme-prod-use1-cluster \
  --service acme-prod-use1-api-service \
  --desired-count 0 \
  --region us-east-1

# 2. Verify CloudFront routes to EU
curl -I https://www.yourdomain.com

# 3. Restore service
aws ecs update-service \
  --cluster acme-prod-use1-cluster \
  --service acme-prod-use1-api-service \
  --desired-count 2 \
  --region us-east-1

💰 Cost Optimization

Estimated Monthly Costs

Service	Estimated Cost (USD)
ECS Fargate (2 regions)	$150 - $300
Aurora Global Database	$400 - $600
DynamoDB (on-demand)	$50 - $200
ALB (2 regions)	$40 - $60
NAT Gateway (4 total)	$180 - $200
S3 + Replication	$50 - $150
CloudFront + WAF	$100 - $300
OpenSearch	$100 - $200
Prometheus + Grafana	$50 - $100
Total (approx)	$1,120 - $2,110/mo

Note: Costs vary based on traffic, data transfer, and usage patterns

Cost Optimization Strategies

Right-Sizing
- Use Fargate Spot for non-critical workloads
- Aurora Serverless v2 for variable workloads
- Reserved Instances for predictable workloads
Network Costs
- Use VPC endpoints to avoid NAT Gateway charges
- Optimize cross-region data transfer
- Enable S3 Transfer Acceleration only when needed
Storage Optimization
- S3 Intelligent-Tiering for data lake
- Lifecycle policies to move old data to Glacier
- Clean up old EBS snapshots
Monitoring Costs
- Adjust CloudWatch log retention
- Use Prometheus for custom metrics (cheaper than CloudWatch custom metrics)
- Sample X-Ray traces (5% sampling configured)
Development/Staging Environments
- Use Terraform workspaces for lower environments
- Reduce instance counts in dev/staging
- Shut down non-prod environments after hours

🐛 Troubleshooting

Common Issues

Issue: Terraform State Lock

Problem: Error acquiring the state lock

Solution:

# Identify the lock
aws dynamodb get-item \
  --table-name acme-terraform-locks-prod-1 \
  --key '{"LockID": {"S": "acme-terraform-state-prod-1/prod/multi-region-platform/terraform.tfstate-md5"}}'

# Force unlock (use with caution)
terraform force-unlock <LOCK_ID>

Issue: ECS Service Not Starting

Problem: Tasks fail to start or immediately crash

Solution:

# Check task logs
aws logs tail /ecs/acme-prod-use1-app --follow --region us-east-1

# Describe stopped tasks
aws ecs describe-tasks \
  --cluster acme-prod-use1-cluster \
  --tasks <task-id> \
  --region us-east-1

Common causes:

Container image not found in ECR
Insufficient IAM permissions
Resource limits (CPU/memory)
Health check failures

Issue: Aurora Global Database Lag

Problem: Replication lag > 1 second

Solution:

# Check replication lag
aws rds describe-db-clusters \
  --db-cluster-identifier acme-prod-euw1-aurora-cluster \
  --region eu-west-1 \
  --query 'DBClusters[0].GlobalWriteForwardingStatus'

# Check CloudWatch metrics
# Navigate to: CloudWatch > Metrics > RDS > AuroraGlobalDBReplicationLag

Issue: CloudFront Not Serving Latest Content

Problem: CDN serving stale content

Solution:

# Create invalidation
aws cloudfront create-invalidation \
  --distribution-id <distribution-id> \
  --paths "/*"

Issue: VPC Endpoint Connection Failures

Problem: Services can't connect to AWS APIs via VPC endpoints

Solution:

Verify security group allows HTTPS (443) from VPC CIDR
Check route tables include endpoint routes
Ensure DNS is enabled on VPC

🤝 Contributing

We welcome contributions! Please follow these guidelines:

How to Contribute

Fork the repository
Create a feature branch
```
git checkout -b feature/amazing-feature
```
Commit your changes
```
git commit -m 'Add amazing feature'
```
Push to your branch
```
git push origin feature/amazing-feature
```
Open a Pull Request

Coding Standards

Follow Terraform best practices
Use meaningful variable and resource names
Add comments for complex logic
Update documentation for new features
Test changes in a dev environment first

Pull Request Checklist

Code follows project conventions
Documentation updated (README, module docs)
terraform fmt applied
terraform validate passes
Tested in isolated environment
No sensitive data committed

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

Made with ❤️ by DevOps Engineers, for DevOps Engineers

Name		Name	Last commit message	Last commit date
docs		docs
live/prod		live/prod
modules		modules
.gitignore		.gitignore
backend.tf		backend.tf
providers.tf		providers.tf
readme.md		readme.md

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🌐 Enterprise Multi-Region SaaS Platform on AWS

📋 Table of Contents

🎯 Overview

🏗️ Architecture

High-Level Architecture Diagram

Regional Architecture

Primary Region (US-East-1)

Secondary Region (EU-West-1)

Global Services

✨ Features

🔒 Security & Compliance

🚀 High Availability & Resilience

📊 Observability & Monitoring

🔄 Data Pipeline

🛠️ DevOps & Automation

🛠️ Tech Stack

Infrastructure

Compute & Services

Data & Storage

Security & Identity

Observability

Edge & CDN

📋 Prerequisites

Required Tools

AWS Account Requirements

Infrastructure Prerequisites

📁 Project Structure

Module Descriptions

🚀 Getting Started

Step 1: Clone the Repository

Step 2: Configure AWS Credentials

Step 3: Update Configuration Variables

Step 4: Initialize Terraform

Step 5: Plan the Deployment

Step 6: Apply the Infrastructure

Step 7: Verify Deployment

📚 Module Documentation

Networking Module

Compute Module

Database Module (Regional)

Database Global Module

Security Baseline Module

Edge Module

Observability Module

Data Pipeline Module

CI/CD Module

📖 Deployment Guide

Phase 1: Core Infrastructure

Phase 2: Data Layer

Phase 3: Compute Layer

Phase 4: Edge & Global Services

Phase 5: Observability

Phase 6: CI/CD Pipeline

Phase 7: Full Deployment

🔒 Security

Encryption

Network Security

Identity & Access

Compliance & Monitoring

Best Practices Implemented

📊 Monitoring & Observability

CloudWatch Dashboards

X-Ray Tracing

Prometheus Metrics

Grafana Dashboards

Log Aggregation

Alerting

🛡️ Disaster Recovery

RTO & RPO Targets

Failover Strategy

Database Failover

Application Failover

DNS Failover

Backup Strategy

Testing DR Plan

💰 Cost Optimization