Disaster Recovery Planner
Design comprehensive disaster recovery strategies for business continuity.
RTO/RPO Targets
Tier RTO RPO Cost Use Case
Critical < 1 hour < 5 min High Payment, Auth
Important < 4 hours < 1 hour Medium Orders, Inventory
Standard < 24 hours < 24 hours Low Reports, Analytics
Multi-Region Failover
AWS Route53 Health Checks and Failover
Resources: PrimaryHealthCheck: Type: AWS::Route53::HealthCheck Properties: HealthCheckConfig: Type: HTTPS ResourcePath: /health FullyQualifiedDomainName: api-us-east-1.example.com Port: 443 RequestInterval: 30 FailureThreshold: 3
DNSFailover: Type: AWS::Route53::RecordSet Properties: HostedZoneId: Z123456 Name: api.example.com Type: A SetIdentifier: Primary Failover: PRIMARY AliasTarget: HostedZoneId: Z123456 DNSName: api-us-east-1.example.com HealthCheckId: !Ref PrimaryHealthCheck
Database Backup Strategy
Automated backup script
#!/bin/bash TIMESTAMP=$(date +%Y%m%d_%H%M%S) DB_NAME="production_db" S3_BUCKET="s3://backups-${DB_NAME}" RETENTION_DAYS=30
Full backup daily
pg_dump -Fc $DB_NAME |
aws s3 cp - "${S3_BUCKET}/full/${TIMESTAMP}.dump"
Point-in-time recovery (WAL archiving)
aws s3 sync /var/lib/postgresql/wal_archive
"${S3_BUCKET}/wal/" --delete
Cleanup old backups
aws s3 ls "${S3_BUCKET}/full/" |
while read -r line; do
createDate=$(echo $line | awk '{print $1" "$2}')
if [[ $(date -d "$createDate" +%s) -lt $(date -d "-${RETENTION_DAYS} days" +%s) ]]; then
fileName=$(echo $line | awk '{print $4}')
aws s3 rm "${S3_BUCKET}/full/${fileName}"
fi
done
Best Practices
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✅ Test DR procedures quarterly
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✅ Automate backup verification
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✅ Document runbooks thoroughly
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✅ Multi-region for critical systems
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✅ Monitor backup success/failure