majiayu000 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
- ✅ Test DR procedures quarterly
- ✅ Automate backup verification
- ✅ Document runbooks thoroughly
- ✅ Multi-region for critical systems
- ✅ Monitor backup success/failure