aws-backup: S3 backup tiering

[HannesOberreiter]

Describe the feature

AWS Backuplower-cost warm storage tier for Amazon S3 backups, see
https://docs.aws.amazon.com/aws-backup/latest/devguide/backup-tiering.html

Use Case

Missing construct (otherwise I missed it, then sorry).

Proposed Solution

AWS CLI example:

aws backup update-tiering-configuration \
--tiering-configuration-name "MyTieringConfig" \
--tiering-configuration '{
  "BackupVaultName":"*",
  "ResourceSelection":[{
    "Resources":["*"],
    "TieringDownSettingsInDays":60,
    "ResourceType":"S3"
  }]
}'   

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS CDK Library version (aws-cdk-lib)

2.231.0

AWS CDK CLI version

2.1033.0

Environment details (OS name and version, etc.)

macOS

[pahud]

Hi @HannesOberreiter,

Thank you for this feature request! You're looking for CDK support for AWS Backup's S3 backup tiering configuration.

I've investigated the current CloudFormation support for this feature, and unfortunately, AWS CloudFormation does not yet support backup tiering configuration as a resource type.

The CloudFormation specification currently includes these AWS Backup resources:

• AWS::Backup::BackupPlan
• AWS::Backup::BackupSelection
• AWS::Backup::BackupVault
• AWS::Backup::Framework
• AWS::Backup::ReportPlan
• AWS::Backup::RestoreTestingPlan
• AWS::Backup::RestoreTestingSelection
• AWS::Backup::LogicallyAirGappedBackupVault

But notably missing TieringConfiguration.

The update-tiering-configuration API you referenced is currently API-only and not exposed through CloudFormation. This means the CDK cannot provide native L1/L2 constructs for this feature until AWS adds CloudFormation support.

Making this a p2 PR with needs-cfn.