DogStark · chideraisiguzor · Mar 25, 2026
diff --git a/backend/README-DISASTER-RECOVERY.md b/backend/README-DISASTER-RECOVERY.md
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+# PetChain Disaster Recovery System
+
+This directory contains a comprehensive disaster recovery system for the PetChain application, providing automated backups, failover mechanisms, and recovery procedures.
+
+## Quick Start
+
+### 1. Environment Setup
+
+```bash
+# Copy environment template
+cp .env.sample .env
+
+# Edit environment variables
+nano .env
+```
+
+Required environment variables:
+```bash
+# Database Configuration
+DB_HOST=localhost
+DB_PORT=5432
+DB_NAME=petchain_db
+DB_USER=postgres
+DB_PASSWORD=your_password
+
+# Backup Configuration
+BACKUP_DIR=/backups
+S3_BUCKET=your-backup-bucket
+NOTIFICATION_EMAIL=admin@petchain.com
+SLACK_WEBHOOK=your-slack-webhook-url
+
+# High Availability
+AUTO_FAILOVER_ENABLED=true
+FAILOVER_CHECK_INTERVAL=60
+```
+
+### 2. Start High Availability System
+
+```bash
+# Deploy with high availability
+docker-compose -f docker-compose.ha.yml up -d
+
+# Verify services are running
+docker-compose -f docker-compose.ha.yml ps
+```
+
+### 3. Run Backup System
+
+```bash
+# Run complete backup
+./scripts/backup-coordinator.sh
+
+# Schedule daily backups (add to crontab)
+0 2 * * * /path/to/scripts/backup-coordinator.sh
+```
+
+### 4. Test Recovery Procedures
+
+```bash
+# Run recovery testing (dry run)
+./scripts/recovery-testing.sh --mode=full --dry-run=true
+
+# Test actual recovery (in test environment)
+./scripts/recovery-testing.sh --mode=database
+```
+
+## System Components
+
+### 🔄 Backup Automation
+- **Database Backups**: Automated PostgreSQL backups with compression
+- **File Backups**: User uploads and documents backup
+- **Configuration Backups**: System configurations and secrets
+- **Cloud Storage**: Automatic S3 upload with retention policies
+
+### ⚡ Failover Mechanisms
+- **Database Failover**: Primary/standby PostgreSQL with automatic promotion
+- **Application Failover**: Load-balanced backend instances
+- **Cache Failover**: Redis master/slave with sentinel
+- **Load Balancer**: NGINX with health checks and automatic routing
+
+### 🛡️ Recovery Procedures
+- **Automated Recovery**: One-command disaster recovery
+- **Selective Recovery**: Database, files, or configuration only
+- **Validation**: Post-recovery integrity checks
+- **Rollback**: Ability to rollback failed recoveries
+
+### 📊 Monitoring & Alerting
+- **Health Monitoring**: Continuous service health checks
+- **Backup Monitoring**: Backup age and integrity monitoring
+- **Performance Monitoring**: System resource monitoring
+- **Multi-channel Alerts**: Email, Slack, and Teams notifications
+
+## Key Scripts
+
+### Backup Scripts
+```bash
+# Complete backup coordination
+./scripts/backup-coordinator.sh
+
+# Database backup only
+./scripts/backup-database.sh
+
+# Files backup only
+./scripts/backup-files.sh
+
+# Configuration backup only
+./scripts/backup-config.sh
+```
+
+### Recovery Scripts
+```bash
+# Full disaster recovery
+./scripts/disaster-recovery.sh --mode=full
+
+# Database recovery only
+./scripts/disaster-recovery.sh --mode=database
+
+# Files recovery only
+./scripts/disaster-recovery.sh --mode=files
+
+# Configuration recovery only
+./scripts/disaster-recovery.sh --mode=config
+```
+
+### Testing Scripts
+```bash
+# Full recovery testing
+./scripts/recovery-testing.sh --mode=full
+
+# Database recovery testing
+./scripts/recovery-testing.sh --mode=database
+
+# Failover testing
+./scripts/recovery-testing.sh --mode=failover
+```
+
+### Monitoring Scripts
+```bash
+# Start health monitoring
+./scripts/health-monitor.sh
+
+# Check system health (one-time)
+./scripts/health-monitor.sh --check-once
+```
+
+## High Availability Architecture
+
+```
+┌─────────────────┐    ┌─────────────────┐
+│   Load Balancer │    │   Health Monitor │
+│   (NGINX)       │    │   (Continuous)   │
+└─────────┬───────┘    └─────────────────┘
+          │
+          ▼
+┌─────────────────┐    ┌─────────────────┐
+│ Backend Primary │◄──►│ Backend Secondary│
+│ (Port 3000)     │    │ (Port 3001)     │
+└─────────┬───────┘    └─────────────────┘
+          │
+          ▼
+┌─────────────────┐    ┌─────────────────┐
+│ PostgreSQL      │◄──►│ PostgreSQL      │
+│ Primary         │    │ Standby         │
+│ (Port 5432)     │    │ (Port 5433)     │
+└─────────┬───────┘    └─────────────────┘
+          │
+          ▼
+┌─────────────────┐    ┌─────────────────┐
+│ Redis Master    │◄──►│ Redis Slave     │
+│ (Port 6379)     │    │ (Port 6380)     │
+└─────────────────┘    └─────────────────┘
+```
+
+## Backup Strategy
+
+### Backup Schedule
+- **Database**: Daily at 2:00 AM
+- **Files**: Daily at 3:00 AM
+- **Configuration**: Weekly on Sunday at 4:00 AM
+- **System Snapshot**: Monthly on 1st at 1:00 AM
+
+### Retention Policy
+- **Daily Backups**: 30 days
+- **Weekly Backups**: 12 weeks
+- **Monthly Backups**: 12 months
+- **Annual Backups**: 7 years
+
+### Storage Locations
+- **Local**: `/backups/` directory
+- **Cloud**: AWS S3 with cross-region replication
+- **Off-site**: Additional backup in separate geographic region
+
+## Recovery Time Objectives
+
+| Component | RTO | RPO | Description |
+|-----------|-----|-----|-------------|
+| Database | 15 minutes | 1 hour | Point-in-time recovery available |
+| Application Files | 30 minutes | 24 hours | Daily backups with file manifests |
+| Configuration | 10 minutes | 1 week | Weekly configuration backups |
+| Complete System | 1 hour | 24 hours | Full disaster recovery procedures |
+
+## Monitoring Dashboard
+
+### Health Checks
+- **Service Status**: Real-time service health monitoring
+- **Resource Usage**: CPU, memory, disk usage tracking
+- **Backup Status**: Backup age and integrity monitoring
+- **Replication Status**: Database and Redis replication monitoring
+
+### Alerts
+- **Critical**: Service failures, backup failures, high resource usage
+- **Warning**: Performance degradation, backup age warnings
+- **Info**: Routine status updates, maintenance notifications
+
+## Testing Procedures
+
+### Monthly Testing
+1. **Backup Integrity**: Verify all backups are valid and accessible
+2. **Recovery Testing**: Test database and file recovery procedures
+3. **Failover Testing**: Test automatic failover mechanisms
+4. **Performance Testing**: Validate system performance under load
+
+### Quarterly Testing
+1. **Full Disaster Recovery**: Complete system recovery in test environment
+2. **Documentation Review**: Update runbooks and procedures
+3. **Security Assessment**: Verify backup encryption and access controls
+4. **Capacity Planning**: Review storage and resource requirements
+
+## Security Features
+
+### Backup Security
+- **Encryption**: AES-256 encryption for all backups
+- **Access Control**: Role-based access control for backup operations
+- **Audit Logging**: Complete audit trail of all backup/recovery actions
+- **Compliance**: GDPR/CCPA compliant data handling
+
+### Network Security
+- **Firewall Rules**: Restrictive firewall configurations
+- **SSL/TLS**: Modern encryption protocols only
+- **VPN Access**: Secure remote access for administration
+- **Multi-factor Authentication**: Required for critical operations
+
+## Troubleshooting
+
+### Common Issues
+
+#### Backup Failures
+```bash
+# Check backup logs
+tail -f /var/log/petchain/backup_*.log
+
+# Verify disk space
+df -h /backups
+
+# Check database connectivity
+pg_isready -h localhost -p 5432
+```
+
+#### Recovery Failures
+```bash
+# Check recovery logs
+tail -f /var/log/petchain/disaster_recovery_*.log
+
+# Verify backup integrity
+gzip -t /backups/database/latest_backup.sql.gz
+
+# Test database connection
+psql -h localhost -U postgres -d petchain_db
+```
+
+#### Failover Issues
+```bash
+# Check failover manager logs
+tail -f /var/log/petchain/failover_manager_*.log
+
+# Verify service health
+curl http://localhost:3000/health
+curl http://localhost:3001/health
+
+# Check load balancer status
+curl http://localhost/upstream_status
+```
+
+## Maintenance
+
+### Daily Tasks
+- Monitor backup completion
+- Review system health dashboard
+- Check alert notifications
+
+### Weekly Tasks
+- Verify backup integrity
+- Review system performance metrics
+- Update documentation as needed
+
+### Monthly Tasks
+- Run full recovery testing
+- Review and update retention policies
+- Perform security assessments
+
+## Support
+
+### Emergency Contacts
+- **DevOps Lead**: devops@petchain.com (24/7)
+- **Database Admin**: dba@petchain.com (24/7)
+- **Security Lead**: security@petchain.com (Business hours)
+
+### Documentation
+- **Runbook**: `docs/disaster-recovery-runbook.md`
+- **Technical Documentation**: `docs/disaster-recovery-documentation.md`
+- **API Documentation**: `docs/api/`
+
+### Monitoring
+- **Health Dashboard**: Available at `/health` endpoint
+- **System Metrics**: Available at `/metrics` endpoint
+- **Backup Status**: Available at `/backup-status` endpoint
+
+## Contributing
+
+When making changes to the disaster recovery system:
+
+1. **Test Changes**: Always test in a non-production environment
+2. **Update Documentation**: Keep all documentation current
+3. **Review Security**: Ensure security implications are considered
+4. **Backup Testing**: Verify backup/recovery procedures after changes
+
+## License
+
+This disaster recovery system is part of the PetChain application and follows the same licensing terms.
+
+---
+
+**Last Updated**: March 25, 2024  
+**Version**: 1.0  
+**Maintained By**: PetChain DevOps Team