Disaster Recovery Plan Enterprise

Comprehensive business continuity and disaster recovery procedures for enterprise deployments.

Risk Assessment

Threat Categories

Business Impact Analysis

Multi-Region Infrastructure

Deployment Architecture

Primary Region (Netherlands - AMS)
├── Production Environment
│   ├── Load Balancers (2x)
│   ├── Application Servers (3x)
│   ├── Database Cluster (3 nodes)
│   └── Redis Cluster (3 nodes)
├── Monitoring & Logging
└── Backup Storage

Secondary Region (Germany - FRA)
├── Standby Environment (Hot Standby)
│   ├── Load Balancers (2x)
│   ├── Application Servers (2x) 
│   ├── Database Replica (read-only)
│   └── Redis Replica
└── Backup Storage (Cross-region)

Tertiary Region (Belgium - BRU)
├── Cold Storage
├── Archive Backups
└── Disaster Recovery Testing

Database Replication Strategy

Primary Database (AMS)
├── Synchronous Replication → Hot Standby (FRA)
├── Asynchronous Replication → Read Replicas (2x AMS)
└── Point-in-Time Backups → Cold Storage (BRU)

Backup Schedule:
├── Real-time → Binary logs (FRA)
├── Hourly → Incremental backups (AMS local)
├── Daily → Full backups (FRA + BRU)
└── Weekly → Archive backups (BRU long-term)

Failure Scenarios & Response

Scenario 1: Single Server Failure

Detection: Health check failure (30 seconds), load balancer removes server

Response: Automatic failover to remaining servers, investigation, deployment of replacement

Recovery Time: 2-5 minutes (automatic) | Data Loss: None (stateless servers)

Scenario 2: Database Failure

Detection: Connection failures, replication lag alerts, error rate spikes

Primary Database Failure Response:

1. Automatic failover to hot standby (FRA)
2. DNS update (automatic)
3. Application restart (automatic)
4. Validation testing (manual)

Recovery Time: 15-30 minutes | Data Loss: <15 minutes (RPO target)

Scenario 3: Data Center Outage

Detection: Multiple service failures, network connectivity loss

Response Procedure:

1. Immediate (Automated): DNS failover to secondary region (FRA)
2. Operations Team: Validate service functionality, scale up resources
3. Communication: Customer notification, status page updates
4. Recovery: Plan restoration timeline, coordinate failback

Recovery Time: 2-4 hours | Data Loss: <15 minutes (database replication)

Scenario 4: Cyber Security Incident

Detection: Security monitoring alerts, unusual patterns, performance degradation

Response Process:

1. Immediate: Isolate affected systems, preserve forensic evidence
2. Containment: Block malicious traffic, disable compromised accounts
3. Recovery: Restore from clean backups, rebuild systems
4. Communication: Customer notification if data affected

Recovery Time: 4-24 hours (scope-dependent) | Data Loss: Variable

Backup Procedures

Backup Strategy

Backup Verification

Daily Automated Testing:

# Database backup validation
mysql -h backup-test-server < latest_full_backup.sql
if [ $? -eq 0 ]; then
    echo "✅ Database backup valid"
else
    echo "❌ Database backup failed" | mail ops@delegated.nl
fi

# File integrity verification
sha256sum -c backup_checksums.txt
if [ $? -eq 0 ]; then
    echo "✅ File backups valid"  
else
    echo "❌ File backup corruption" | mail ops@delegated.nl
fi

Recovery Procedures

Database Recovery

Point-in-Time Recovery:

# Stop slave replication
STOP SLAVE;

# Restore full backup
mysql < backup_2024-03-20_03-00-00.sql

# Apply binary logs up to incident time
mysqlbinlog --start-datetime="2024-03-20 03:00:00" \
           --stop-datetime="2024-03-20 14:30:00" \
           binlog.000123 binlog.000124 | mysql

# Verify data integrity
CHECKSUM TABLE users, tasks, workspaces;

# Start slave replication
START SLAVE;

Master-Slave Failover:

# Promote slave to master
mysql -e "STOP SLAVE; RESET MASTER;"

# Update application configuration
sed -i 's/db-master/db-failover/' /etc/app/config.php

# Restart application servers
systemctl restart php-fpm nginx

# Validate functionality
curl -f http://api.delegated.nl/v2/health || exit 1

Communication Plan

Stakeholder Notification Matrix

Communication Templates

Customer Notification (Critical Incident):

Testing & Validation

Disaster Recovery Testing Schedule

Test Results Tracking

Cost Analysis

DR Infrastructure Costs

Cost-Benefit Analysis

Compliance Requirements

Service Level Agreements

Regulatory Compliance

• GDPR: Backup encryption, cross-border safeguards, 72h breach notification
• SOC 2 Type II: Documented procedures, regular testing, incident response
• ISO 27001: Business continuity management, risk assessment

Contact Information

24/7 Emergency Contacts