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My team has two completely different environments: a Terraform one (which allow us to create and manage some AWS resources as databases) and a CDK one, with contains API resources and its logics as well.

We would like to use databases resources created with Terraform in the CDK app.

I was looking for some simple way to import outputs or tfstate from Terraform into CDK app, but I've found nothing.

I'd like to know how'd you achieve something like that?

Gigs
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  • CDKTF would probably need to parse the JSON output from TF. Whichever language you are using for CDKTF should possess that capability. – Matthew Schuchard Jan 27 '23 at 11:09
  • Thanks @MattSchuchard for your answer. Te "problem" here is that I'm not using CDKTF it's just CDK. And a Terraform project is completely a part from CDK one. – Gigs Jan 27 '23 at 14:30
  • That should still work even with the AWS CDK. – Matthew Schuchard Jan 27 '23 at 16:21
  • @MattSchuchard So I should fetch the tfstate from Terraform Remote Backend (S3 for example) on my CDK project, in order to get the outputs for my CDK app. That was the only solution I found for the moment. Is that what you mean? – Gigs Jan 27 '23 at 16:24

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So, I finally solved this issue by using the tfstate file on CDK : our Remote Backend is AWS, so the tfstate is stored on S3. When we run the CDK app we fetch this file from S3 and we inject its outputs into an application service.

It allows to always get the updated outputs from resources generated with Terraform.

Gigs
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