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Tuần 7 - Ngày 2: Disaster Recovery Strategies

Tuần 7 – Ngày 2

Tuần 7 - Ngày 2: Disaster Recovery Strategies

1. DR Strategy Comparison

┌─────────────────────────────────────────────────────────┐│DRSTRATEGIES(byRTO/RPO)││││Strategy│RTO│RPO│Cost││─────────────────┼──────────┼──────────┼──────────││Backup/Restore│Hours│Hours│$││PilotLight│Minutes│Minutes│$$││WarmStandby│Minutes│Seconds│$$$││Multi-Site│~Zero│~Zero│$$$$│└─────────────────────────────────────────────────────────┘

2. Backup and Restore

┌─────────────────────────────────────────────────────────┐│BACKUPANDRESTORE││││PrimaryRegionDRRegion││┌──────────────┐┌──────────────┐│││Production│────Backup──►│S3Bucket││││-AMIs││-Snapshots││││-Snapshots││-Backups││││-Data│││││└──────────────┘└──────────────┘││││Recovery:││1.Restorefrombackups││2.Deployinfrastructure(CloudFormation)││3.Restoredata││4.SwitchDNS││││RTO:24+hours│RPO:Lastbackuppoint│└─────────────────────────────────────────────────────────┘

3. Pilot Light

┌─────────────────────────────────────────────────────────┐│PILOTLIGHT││││PrimaryRegion│DRRegion││┌────────────────────┐│┌────────────────────┐│││WebTier(ON)│││WebTier(OFF)│││├────────────────────┤│├────────────────────┤│││AppTier(ON)│││AppTier(OFF)│││├────────────────────┤│├────────────────────┤│││DB(Primary)│───►││DB(Replica,ON)│││└────────────────────┘│└────────────────────┘│││││Recovery:│││1.ScaleupDBreplica│││2.Startweb/appservers│││3.SwitchRoute53││││││RTO:10-30minutes│RPO:Minutes│└─────────────────────────────────────────────────────────┘

4. Warm Standby

┌─────────────────────────────────────────────────────────┐│WARMSTANDBY││││PrimaryRegion│DRRegion││┌────────────────────┐│┌────────────────────┐│││FullCapacity│││MinimumCapacity││││████████████████│││████│││││││││││Alltiersrunning│───►││Reducedsize│││└────────────────────┘│└────────────────────┘│││││Recovery:│││1.ScaleupDRinstances│││2.SwitchRoute53││││││RTO:Minutes│RPO:Seconds│└─────────────────────────────────────────────────────────┘

5. Multi-Site Active/Active

┌─────────────────────────────────────────────────────────┐│MULTI-SITEACTIVE/ACTIVE││││Route53(Weighted/Latency)│││││┌──────────┴──────────┐││▼▼││┌──────────────┐┌──────────────┐│││Region1│◄────►│Region2││││Fullstack│Sync│Fullstack││││(Active)││(Active)│││└──────────────┘└──────────────┘││││DataSync:││-DynamoDBGlobalTables││-AuroraGlobalDatabase││-S3Cross-RegionReplication││││RTO:Nearzero│RPO:Nearzero│└─────────────────────────────────────────────────────────┘

6. AWS Backup

Centralized Backup Management:
- EC2, EBS, RDS, DynamoDB, EFS, FSx
- Cross-region backup
- Cross-account backup
- Backup policies and plans
- Vault Lock (WORM)

7. Route 53 Health Checks for DR

Failover Routing:
1. Health check monitors primary endpoint
2. Primary fails → Route 53 detects
3. Traffic switches to secondary
4. Primary recovers → Traffic returns

DNS TTL: Set low for faster failover

Tài liệu tham khảo chính thức

Ngày tiếp theo: Security Advanced