Update Existing Lambda Function Using AWS Continuous Integration/Deployment

Question

I have several AWS Lambda Functions created using AWS Console and every function has some dependent APIs.Now I want to integrate the same with AWS CI/CD using CodeBuild, CodePipeline, and CloudFormation. But the problem is I'm unable to update the existing lambda functions that are not created using the CloudFormation Stack
Error Message ABC_Lambda already exists

Please note that if I create a new lambda using the CI/CD flow and then try to update it, that's working fine.

So my questions are

1. How do I integrate the existing Lambda functions with AWS CI/CD workflow, without deleting and re-creating them?

2. Is there any way or SAM_template config param that force the CloudFormation to update the existing lambda(created using AWS console/AWS Commandline tool).

Answer 1

As noted by @omuthu, if you have not created the Lambdas with Cloudformation, you cannot use Cloudformation to update them.

What you could do, is, in your CodeBuild step, use the update-function-code and update-function-configuration APIs to perform the operations you need. This though does not allow you to integrate with SAM due to the limitation mentioned above.