How to pass a list of values into Lambda environment variables with Terraform-CodePudding

I have a Python script that sends an email to multiple recipients. I'd like to set up my recipients with Terraform and pass them into my Lambda function as environment variables. I have set up SES as separate module.

Lambda function:

def lambda_handler(event, context):
    email_to = os.environ["EMAIL"]
    # script that sends an email is here

Lambda module main.tf:

resource "aws_lambda_function" "test_lambda" {
  filename      = var.filename
  function_name = "test_name"
  role          = "arn:aws:iam::123:role/lambda_role"
  handler       = var.handler

  source_code_hash = var.source_code_hash
  runtime = var.runtime
  timeout = var.timeout
  kms_key_arn = var.kms_key_arn
  memory_size = var.memory

  dynamic "environment" {
    for_each = var.env_variables != null ? var.env_variables[*] : []
    content {
      variables = environment.value
    }
  }

}

SES module main.tf:

resource "aws_ses_email_identity" "email" {
    email = var.email
}

SES module outputs.tf:

 output "email" {
    description = "Emails."
    value       = aws_ses_email_identity.email.email
    }

main.tf

module "lambda_zip" {
    source                = "../modules/lambda_zip"
    handler               = "lambda_function.lambda_handler"
    runtime               = "python3.8"
    filename              = "setup.zip"

    env_variables = {
     EMAIL = module.ses[*].email
   }
}

module "ses" {
    source      = "../modules/ses"
    for_each    = toset(["[email protected]", "[email protected]"])
    email       = each.value
}

output "email" {  
value = module.ses.email 
}

With the current setup I get this error:

│ Error: Unsupported attribute
│
│   on main.tf line 24, in module "lambda_zip":
│   24:    EMAIL = jsonencode(module.ses[*].email)
│
│ This object does not have an attribute named "email".
╵
╷
│ Error: Unsupported attribute
│
│   on main.tf line 40, in output "email":
│   40:   value = module.ses.email
│     ├────────────────
│     │ module.ses is object with 2 attributes
│
│ This object does not have an attribute named "email".

How can I register new emails with SES and also pass them into the Python function?

CodePudding user response：

If you want to pass all emails at once, it it should be:

    env_variables = {
     EMAIL = jsonencode(values(module.ses)[*].email)
   }

In your function then, you have to process the EMAIL as json data structure.