Multi-Cloud Disaster Recovery System

A comprehensive disaster recovery solution implementing cross-region backup strategy using AWS S3 and Azure Blob Storage with automated failover capabilities.

Features

• Cross-Region Backup: Automated backups across AWS S3 and Azure Blob Storage
• Automated Failover: Terraform-based failover with 15-minute RTO
• Kubernetes Backup: Velero integration for cluster state backup
• Monitoring & Alerting: Real-time monitoring of backup health
• Python Automation: Scripts for backup management and orchestration

Architecture

Primary Region (AWS)     Secondary Region (Azure)
┌─────────────────┐     ┌──────────────────┐
│   Application   │────▶│  Standby App     │
│                 │     │                  │
│   AWS S3        │◀───▶│  Azure Blob      │
│   Backup        │     │  Storage         │
└─────────────────┘     └──────────────────┘
         │                       │
         └───────────────────────┘
              Terraform Failover

Technologies

• Infrastructure: Terraform
• Cloud Providers: AWS, Azure
• Automation: Python 3.9+
• Kubernetes Backup: Velero
• Configuration: YAML

Prerequisites

• Terraform >= 1.5.0
• AWS CLI configured with appropriate credentials
• Azure CLI configured with appropriate credentials
• Python 3.9+
• kubectl (for Velero)
• Velero CLI

Quick Start

1. Configure Variables

cd terraform/aws
cp terraform.tfvars.example terraform.tfvars
# Edit terraform.tfvars with your AWS settings

cd ../azure
cp terraform.tfvars.example terraform.tfvars
# Edit terraform.tfvars with your Azure settings

2. Deploy Infrastructure

# Deploy AWS infrastructure
cd terraform/aws
terraform init
terraform plan
terraform apply

# Deploy Azure infrastructure
cd ../azure
terraform init
terraform plan
terraform apply

3. Install Velero

# Install Velero in your Kubernetes cluster
./scripts/install-velero.sh

4. Configure Backups

# Apply Velero backup schedules
kubectl apply -f velero/backup-schedule.yaml

5. Run Initial Backup

python python/backup/backup_manager.py --full-backup

RTO/RPO Metrics

• RTO (Recovery Time Objective): 15 minutes
• RPO (Recovery Point Objective): 5 minutes
• Backup Frequency: Every 5 minutes (incremental), Daily (full)
• Cross-Region Replication: Real-time

Project Structure

multi-cloud-dr/
├── terraform/
│   ├── aws/                    # AWS infrastructure
│   ├── azure/                  # Azure infrastructure
│   └── modules/               # Reusable Terraform modules
├── python/
│   ├── backup/                # Backup automation scripts
│   ├── restore/               # Restore automation scripts
│   └── monitoring/            # Monitoring scripts
├── velero/                    # Velero configurations
├── scripts/                   # Utility scripts
└── docs/                      # Additional documentation

Disaster Recovery Procedures

Automatic Failover

The system monitors primary region health and automatically triggers failover when:

• Primary region is unavailable for > 2 minutes
• Health check failures exceed threshold
• Manual trigger via API

Manual Failover

python python/restore/failover_manager.py --target azure --mode manual

Restore from Backup

# Restore specific backup
python python/restore/restore_manager.py --backup-id <backup-id> --target aws

# Restore latest backup
python python/restore/restore_manager.py --latest --target azure

Monitoring

Access monitoring dashboards:

• Backup Status: python python/monitoring/dashboard.py
• Health Checks: python python/monitoring/health_check.py

Testing

Run disaster recovery drills:

./scripts/dr-drill.sh

Security

• All data encrypted at rest (AES-256)
• Encrypted in transit (TLS 1.3)
• IAM roles with least privilege
• Cross-region replication with versioning
• Audit logging enabled

Contributing

1. Fork the repository
2. Create a feature branch
3. Commit your changes
4. Push to the branch
5. Create a Pull Request

License

MIT License

Support

For issues and questions, please open an issue in the repository.