import no longer supported with Terraform 0.12.x as of v1.29.0

[blbradley]

on Terraform 0.12.16 and 0.12.29 with v1.31.0

✗ terraform import "module.lambda.aws_lambda_function.this[0]" my-function
module.lambda.aws_lambda_function.this[0]: Importing from ID "my-function"...
module.lambda.aws_lambda_function.this[0]: Import prepared!
  Prepared aws_lambda_function for import
module.lambda.aws_lambda_function.this[0]: Refreshing state... [id=my-function]

Error: Error in function call

  on .terraform/modules/lambda/iam.tf line 9, in locals:
   9:   role_name = local.create_role ? coalesce(var.role_name, var.function_name) : null
    |----------------
    | var.function_name is ""
    | var.role_name is null

Call to function "coalesce" failed: no non-null, non-empty-string arguments.

Cleared by switching to v1.28.0, which does not have the line with the error.

[antonbabenko]

You need to specify some value for either function_name or role_name inside of module block before calling terraform import, like this:

module "lambda" {
  source = "terraform-aws-modules/lambda/aws"

  function_name = "my-function"
  handler       = "index.lambda_handler"
  runtime       = "python3.8"
}

There is not much we can do in this module, unfortunately!

[blbradley]

Function name and role name were already defined.

[antonbabenko]

I see the error you have when I don't have function_name argument in the module block and it works successfully when I specify it.

[bmurphey]

I confirmed I'm getting the same results, with Terraform 0.12.30 and module v1.35.0. Switching to module v1.28.0 works.

My code:

module "main-lambda-trigger" {
  source = "terraform-aws-modules/lambda/aws"
  version = "1.35"

  function_name = "trigger"
  description   = "My awesome lambda function"
  handler       = "trigger.lambda_handler"
  runtime       = "python3.8"

  create_package = false

  tags = {
    Name = "trigger"
  }
}

Specifying role_name doesn't help, either.

[mike-carey]

I have created a PR that could potentially work around this. The other option I was able to use was to pin it to a lower version to do the imports and then raise the version back.

[antonbabenko]

This should be now fixed and available in v1.43.0 of this module (see #121), which by the way has the minimum Terraform version requirements of 0.12.26.

[github-actions]

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