(aws-backup): BackupResource has limited support for Aurora RDS

[james-mathiesen]

BackupResource does not support RDS Aurora databases.

public static fromRdsDatabaseInstance(instance: IDatabaseInstance): BackupResource

however the type IDatabaseInstance does not encompass Aurora databases. I believe additional methods are
needed to support these additional types:

IDatabaseCluster
IServerlessCluster

Additionally, BackupResource::fromConstruct() ignores Aurora databases even though they are supported by AWS Backup.

Use Case

There is no obvious way to backup Aurora databases from the CDK even though AWS Backup fully supports them.

The escape-hatch like BackupResource::fromArn() is an effective workaround.

[ahmetsevki]

I did the following:

    const clusterArn = `arn:aws:rds:${process.env.CDK_DEFAULT_REGION}:${process.env.CDK_DEFAULT_ACCOUNT}:cluster:${postgresRDSCluster.clusterIdentifier}`
// ...
    plan.addSelection('BackupPlanSelection2', {
      role: backupSelectionRole,
      resources: [BackupResource.fromArn(clusterArn)],
    })

I can see my cluster arn in plan selection, however I still do not see my cluster in the "Protected Resources"list.

Did you pass the cluster arn, or the individual database server arns for it to show up in protected resources?

[jumic]

I found this note in the documentation:

Only resources that have been backed up by AWS Backup are listed under Protected resources.

Did you wait until a backup should be created?

[github-actions]

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