How to get CDK version used to deploy a stack?

[pmezard]

Hello,

I have received an AWS notification telling me:

You are receiving this notification because you currently have at least one CloudFormation Stack deployed using version 1 of the AWS Cloud Development Kit (CDK).

which surprised me, I thought all the stacks were migrated to 2.x already. Unfortunately, it does not tell me which ones are still on version 1, or any way to get them.

How can I find the stacks still deployed with version 1?

I could not find anything relevant in AWS console or playing with cdk cli.

Thank!

[pepdekpd]

Indeed, am having the same question. In our cloudformation templates I find something like this:

"CDKMetadata": {
   "Type": "AWS::CDK::Metadata",
   "Properties": {
    "Analytics": "**v2**:deflate64:< --cut away some hashes here -- > "
   },

In the documentation there is written about the analytics property:
By default, the AWS CDK reports the use of constructs in the following NPM modules that are used in the stack:

AWS CDK core module
AWS Construct Library modules
AWS Solutions Constructs module
AWS Render Farm Deployment Kit module

And indeed :

echo "H4sIAAAAAAAA/1WQwQ6CMAyGn8X7mIpRz+rBiwcD3k0dlVTGRraCB7J3d4hGPLV//69N21SmW7mYwdMnqqgSTTfZ5wyqEoe7OYODGhmdyNDb1ikUEbz2qMEzKW2huIEGo8iUXSr7XdNoUsBkzSl6+7cXu+OoPz3lyDOaD/PNJ/4FXIl8dLZtBmQig4ijmO4DiDUYKNHJ/vCrDfxEBhG7GNeruGeGyrpiAMYsRw5hlOOdQRhboHz4ebfcyOU6vujhiRLXGqYaZTbGF1Gm95I+AQAA" | base64 -di | zcat
2.27.0!aws-cdk-lib.{Stack,CfnParameter,Resource,aws_{elasticloadbalancingv2.{ApplicationLoadBalancer,CfnLoadBalancer,ApplicationListener,CfnListener,ApplicationTargetGroup,CfnTargetGroup},certificatemanager.{Certificate,CfnCertificate},route53.{ARecord,CfnRecordSet}},CfnResource},node.js/v16.15.0!jsii-runtime.Runtime

In the cdk workshop there is CDKMetadata of an older version:

CDKMetadata:

    Type: AWS::CDK::Metadata
    Properties:
      Modules: aws-cdk=1.21.1,@aws-cdk/aws-cloudwatch=1.21.1,@aws-cdk/aws-iam=1.21.1,@aws-cdk/aws-kms=1.21.1,@aws-cdk/aws-sns=1.21.1,@aws-cdk/aws-sns-subscriptions=1.21.1,@aws-cdk/aws-sqs=1.21.1,@aws-cdk/core=1.21.1,@aws-cdk/cx-api=1.21.1,@aws-cdk/region-info=1.21.1,jsii-runtime=node.js/v13.6.0
    Condition: CDKMetadataAvailable

Apparently in CDKv2 there is no Modules: property anymore.

So based on the assumption that version-reporting was enabled would it work to retreive al cfn templates and check if there is CDKMetadata.Modules property to determine a CDK v1 cloudformation stack?

[pmezard]

Thanks @pepdekpd , I was almost there wrt Analytics but failed to get the proper python invocation to decompress using deflate and bypassing the missing gzip/zlib headers. For those interested, just use the following to autodetect the stream mode:

zlib.decompress(data, wbits=zlib.MAX_WBITS | 32)

[peterwoodworth]

We've sent out a notification more recently for affected stacks since this discussion has been active - but you can identify stacks with this tool if anyone is still interested https://github.com/cdklabs/awscdk-v1-stack-finder

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.