Deploying simple helloworld lambda function (python) using Terraform script - error creating "test lambda"

Question

I am trying to create a lambda function using terraform script I get error saying "error creating lambda function" I have put the screen shot of the error also

This is the terraform script:

I created a role in AWS Management console and gave a name as "Welcome-Lambda-Role". That is what I referred to that role in the script below. I don't know if that is the issue.

provider "aws" {
  region     = "us-west-2"
  access_key = "xxz"
  secret_key = "yyyydtEyZtOaQVGF5h"
}
data "archive_file" "welcome" {
  type = "zip"
  source_file = "welcome.py"
  output_path = "outputs/welcome.zip"
}
resource "aws_lambda_function" "test_lambda" {
  filename = "outputs/welcome.zip"
  function_name = "welcome"
  handler = "welcome.hello"

  //created this role manually in AWS console and referred to that role in the next line
  role = "Welcome-Lambda-Role"
 
  //source_code_hash = filebase64sha256("lambda_function_payload.zip")
  runtime = "python3.7"
}

welcome.py file content

  def hello(event, context):
     print("Welcome to terraform")

Marcin · Accepted Answer · 2021-02-10 00:19:07Z

1

The role should be ARN of the role, not its name only:

data "aws_iam_role" "role" {
  name = "Welcome-Lambda-Role"
}

resource "aws_lambda_function" "test_lambda" {

      filename      = "welcome.zip"
      function_name = "welcome"
      handler       = "welcome.lambda_handler"

      role          = data.aws_iam_role.role.arn
      
      runtime       = "python3.7"

}

or if you just want to hard code it:

resource "aws_lambda_function" "test_lambda" {

      filename      = "welcome.zip"
      function_name = "welcome"
      handler       = "welcome.lambda_handler"

      role          = "arn:aws:iam::xxxx:role/service-role/Welcome-Lambda-Role"
      
      runtime       = "python3.7"

}

answered Feb 10, 2021 at 0:19

Marcin

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5 Comments

Jason Over a year ago

thank you Marcin. that error is gone. for some reason my welcome.py file that gets added to welcome.zip file has no content. thats why I am getting this error.

Marcin Over a year ago

@Jason You haven't shown your welcome.py, maybe its empty or its in different locatoin? Your archive_file is correct.

Jason Over a year ago

sorry I forgot to put welcome.py. I added that to the orginal post above. sorry just getting up to speed on terraform. why do I need to upload welcome.zip. why can't it be welcome.py file itself?

Marcin Over a year ago

@Jason Zip is your lambda deployment package. There is nothing wrong with your code or lambda function apart the role issue. If you have other issues (empty welcome.py) then its not represented in your question.

Jason Over a year ago

thank you Zip. I will go thru the link You shared. appreciatae your help. One question. Is it normal to deploy Lambda functions using Terraform scripts? I built a CI/CD Jenkins pipeline to deploy terraform scripts. My plan was to use that pipeline to deploy the Lambda functions thru that terraform scripts.

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