[SOLVED] Terraform lambda runtime management config: Fetch ALL lambda's ARN's

Terraform lambda runtime management config: Fetch ALL lambda's ARN's

Hi I am working on something very simple

I am creating a lambda runtime management config to manage all my lambda. I have around 9 existing ones.

resource "aws_lambda_runtime_management_config" "example" {
  function_name     = aws_lambda_function.[*].function_name
  update_runtime_on = "Auto" # Options: Auto, FunctionUpdate, Manual
}

On the required function_name I would like to fetch ALL the ARN's for all my lambda's function. I know it's very simple and I have a feeling I am making it too difficult for myself> I would appreciate some feedback.

Solution

If the update_runtime_on argument needs to have the same value of "Auto", then this should be pretty straightforward. If the Lambda functions were created using the count meta-argument, the code should look something like the following:

resource "aws_lambda_runtime_management_config" "example" {
  count             = 9 # or whatever count argument you are using when creating the functions   
  function_name     = aws_lambda_function.example[count.index].function_name
  update_runtime_on = "Auto" # Options: Auto, FunctionUpdate, Manual
}

If the functions were created using the for_each meta-argument, then you could use resource chaining with for_each:

resource "aws_lambda_runtime_management_config" "example" {
  for_each          = aws_lambda_function.example
  function_name     = each.value.function_name
  update_runtime_on = "Auto" # Options: Auto, FunctionUpdate, Manual
}