for_each not supported to create multiple lambda functions

[chrismillah]

Description

Using for_each does not work when trying to create multiple lambdas based upon some var of type list(string)

Versions

• Terraform:
  v0.15.0

• Provider(s):

  • provider registry.terraform.io/hashicorp/aws v3.37.0
  • provider registry.terraform.io/hashicorp/external v2.1.0
  • provider registry.terraform.io/hashicorp/local v2.1.0
  • provider registry.terraform.io/hashicorp/null v3.1.0
  • provider registry.terraform.io/hashicorp/random v3.1.0

• Module:

module "lambda" {
  source  = "terraform-aws-modules/lambda/aws"
  version = "1.47.0"
  # insert the 28 required variables here
}

Reproduction

Steps to reproduce the behavior:

1. set variable of type list(string
2. use latest tf and module version for lambda
3. try to loop over vars to create more than 1 lambda using the same module
4. errors

Code Snippet to Reproduce

variables.tf

variable "my-var" {
type = list(string)
}

terraform.auto.tfvars

my-var=["one","two","three"]

main.tf

module "lambda_function" {
  version        = "1.47.0"
  source         = "terraform-aws-modules/lambda/aws"
  for_each       = toset(var.my-var)
  function_name  = "function-name-${each.key}"
  description    = "My Description"
  handler        = "index.handler"
  runtime        = "nodejs14.x"
  create_package = false
  s3_existing_package = {
    bucket = "existing-lambda-zip-in-s3"
    key    = "lambda/${each.key}/index.zip"
  }
}

Expected behavior

Create lambda for each of the values in the var, e.g.

Creates 3 lambdas, per the defined variable

Actual behavior

Error returned:

Error: error creating Lambda Function (1): ValidationException: 
│       status code: 400, request id: 9a97feb4-b486-4469-ac0f-d5992faa27c8
│ 
│   on .terraform/modules/lambda_function/main.tf line 14, in resource "aws_lambda_function" "this":
│   14: resource "aws_lambda_function" "this" {

Terminal Output Screenshot(s)

Additional context

Plan comes back clean, only after apply do you get these errors.

I believe this is due to the count in the module not expecting more than one, but haven't dug into that code quite yet

[antonbabenko]

What is the error message exactly?

[chrismillah]

What is the error message exactly?

Hey @antonbabenko i've listed in the "Actual Behavior" section -- l've also added a screenshot for more context

[antonbabenko]

I can't reproduce it and created #146

There should be something else inside of the arguments to the module which triggers ValidationException. Maybe content of the archive or handler?

[chrismillah]

Thanks for your help @antonbabenko

This issue was related to my variable values, didn't realize i had a "." in them which is not allowed

Closing this issue

[github-actions]

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