rds: secret rotation application should allow custom SemanticVersion

[pahud]

Describe the feature

The SemanticVersion is hardcoded in SecretApplocationRotation and here:

aws-cdk/packages/aws-cdk-lib/aws-secretsmanager/lib/secret-rotation.ts

Line 167 in 1fdac0c

return '1.1.93';

There's no way to allow users to customize the SemanticVersion for that.

Use Case

Some versions might be deprecated because of Lambda runtime deprecation and we can't just update the CDK code for that.

Proposed Solution

We should allow user to specify their desired custom SemanticVersion.

Other Information

Before we have a PR for this, a workaround is like:

1. look up the latest semanticVersion for the serverless application. For example, this returns the SemanticVersion for us-east-1.

aws serverlessrepo get-application --application-id arn:aws:serverlessrepo:us-east-1:297356227824:applications/SecretsManagerRDSMySQLRotationSingleUser --query ‘Version.SemanticVersion’
“1.1.431”

2. Override the SemanticVersion with your custom version like:

export class DummyStack extends Stack {
  constructor(scope: Construct, id: string, props: StackProps) {
    super(scope, id, props);  

    const vpc = ec2.Vpc.fromLookup(this, 'Vpc', {isDefault: true });
    const instance = new rds.DatabaseInstance(this, 'Instance', {
      vpc,
      engine: rds.DatabaseInstanceEngine.MYSQL,
    });
    const rotation = instance.addRotationSingleUser();
    const secretRotation = instance.node.tryFindChild('RotationSingleUser') as secrets.SecretRotation;
    (secretRotation.node.defaultChild as sam.CfnApplication).addPropertyOverride('Location.SemanticVersion', '9999');
  }
}

In this sample, I am overriding the SemanticVersion to 9999.

3. cdk synth and check the template you should see this

 "InstanceRotationSingleUser90E8AB49": {
   "Type": "AWS::Serverless::Application",
   "Properties": {
    "Location": {
     "ApplicationId": {
      "Fn::FindInMap": [
       "InstanceRotationSingleUserSARMappingFEA0C86E",
       {
        "Ref": "AWS::Partition"
       },
       "applicationId"
      ]
     },
     "SemanticVersion": "9999"
    },

Acknowledgements

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

CDK version used

2.132.0

Environment details (OS name and version, etc.)

all

[pahud]

related #18249

[pahud]

another workaround mentioned #18249 (comment)

[github-actions]

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