Why do I get "Error: handler and runtime must be set when PackageType is Zip" when deployi-CodePudding

I have defined a Lambda function with Terraform like this:

resource "aws_lambda_function" "this" {
  filename = "${path.module}/src/existing-files-lambda.zip"
  function_name = "ingest-existing-files-lambda"
  role = aws_iam_role.lambda.arn

  runtime = "python3.9"
  timeout = 900
  environment {
   variables = {
      source_bucket_arn = var.source_bucket_arn  
      destination_bucket_arn = var.destination_bucket_arn  
    }
  }
}

resource "aws_iam_role" "lambda" {
  name = "${var.prefix}-lambda-ingest"
  path = "/service-role/"

  assume_role_policy = jsonencode({
    Version = "2012-10-17"
    Statement = [{
      Effect    = "Allow"
      Principal = { Service = "lambda.amazonaws.com" }
      Action    = "sts:AssumeRole"
    }]
  })
}

My python file is just this:

import os


def lambda_handler(event, context):
    print('Hello world from Terraform')
    return {
        'statusCode': 200,
    }

However, I am currently getting an error that:

│ Error: handler and runtime must be set when PackageType is Zip
│ 
│   with module.ingest_lambda.aws_lambda_function.this,
│   on ingest_lambda/main.tf line 8, in resource "aws_lambda_function" "this":
│    8: resource "aws_lambda_function" "this" {

What do I put as handler here?

I already have runtime specified.

CodePudding user response：

I think that you need to add a handler here:

resource "aws_lambda_function" "this" {
  filename = "${path.module}/src/existing-files-lambda.zip"
  function_name = "ingest-existing-files-lambda"
  handler = "ingest-existing-files-lambda.lambda_handler"
  role = aws_iam_role.lambda.arn

  runtime = "python3.9"
  timeout = 900
  environment {
   variables = {
      source_bucket_arn = var.source_bucket_arn  
      destination_bucket_arn = var.destination_bucket_arn  
    }
  }
}

Check in your AWS console, in the lambda service that the handler is correctly set once the statement above executed.

CodePudding user response：

You have defined the Lambda function runtime but you haven't mentioned where the entry point to the function is.

That is what the handler argument specifies - it is the method in your function code that processes events.

It should have a format similar to:

def handler_name(event, context): 
    ...
    return some_value

The value of the handler argument is comprised of the below, separated by a dot:

The name of the file in which the Lambda handler function is located
The name of the Python handler function.

e.g. ingest-existing-files-lambda.lambda_handler calls thelambda_handler function defined in ingest-existing-files-lambda.py.

If your Lambda handler method is called lambda_handler & is inside ingest-existing-files-lambda.py, this should work:

resource "aws_lambda_function" "this" {
  filename = "${path.module}/src/existing-files-lambda.zip"
  function_name = "ingest-existing-files-lambda"
  handler = "ingest-existing-files-lambda.lambda_handler"
  role = aws_iam_role.lambda.arn

  runtime = "python3.9"
  timeout = 900
  environment {
   variables = {
      source_bucket_arn = var.source_bucket_arn  
      destination_bucket_arn = var.destination_bucket_arn  
    }
  }
}