災害対策 (DR)

災害対策 (DR)

マルチリージョン構成

# プライマリリージョン
PrimaryRegion:
  Resources:
    DBInstance:
      Type: AWS::RDS::DBInstance
      Properties:
        Engine: mysql
        MultiAZ: true
        BackupRetentionPeriod: 7

# セカンダリリージョン（DR用）
SecondaryRegion:
  Resources:
    DBInstance:
      Type: AWS::RDS::DBInstance
      Properties:
        Engine: mysql
        SourceDBInstanceIdentifier: !Sub 'arn:aws:rds:primary-region:${AWS::AccountId}:db:primary-db'
        ReadReplica: true

バックアップ戦略

BackupPlan:
  Type: AWS::Backup::BackupPlan
  Properties:
    BackupPlan:
      BackupPlanName: DailyBackup
      Rules:
        - RuleName: DailyBackupRule
          TargetBackupVault: !Ref BackupVault
          ScheduleExpression: cron(0 2 * * ? *)
          StartWindowMinutes: 60
          CompletionWindowMinutes: 120
          Lifecycle:
            DeleteAfterDays: 30
            MoveToColdStorageAfterDays: 7

Route 53ヘルスチェック

HealthCheck:
  Type: AWS::Route53::HealthCheck
  Properties:
    HealthCheckConfig:
      Type: HTTP
      ResourcePath: /health
      FullyQualifiedDomainName: api.example.com
      RequestInterval: 30
      FailureThreshold: 3

RecordSet:
  Type: AWS::Route53::RecordSet
  Properties:
    HostedZoneId: !Ref HostedZone
    Name: api.example.com
    Type: A
    SetIdentifier: primary
    Failover: PRIMARY
    HealthCheckId: !Ref HealthCheck
    AliasTarget:
      DNSName: !GetAtt PrimaryLoadBalancer.DNSName
      HostedZoneId: !GetAtt PrimaryLoadBalancer.CanonicalHostedZoneID