Create Lambda in CloudFormation with unknown ImageUri property

Question

I'm building my infrastructure on AWS with CLoudFormation and I want to create a Lambda Function that pull the code image from ECR. So I added to my CloudFormation template one Lambda resource depending on a ECR repository resource. The problem is that Lambda template requires the "imageUri" properties, but actually I don't know it because the image does not exists and the ECR repository is not created yet.

Should I first create an ECR and push the image and only then edit the whole CLoudformation template adding the Lambda resource?

Honestly I don't like this approach since I prefer my whole infrastructure would be built before any software work.

Answer 1

No, it's not possible. The best you could get is to build a 'hello world' type container and use that in the lambda. You can then update the lambda when you've written the real thing.