amazon web services - Getting 'invalid reference format' error on localstack when use 'aws lambda invoke'

Question

I'm using localstack/terraform/aws (latest versions) to play with lambda on aws locally. The configuration can be found here https://github.com/wentao-daommo/aws-local

While I can successfully setup/deploy everything and list my lambda function via 'aws lambda list-functions'. I was unable to invoke the function with command

aws --endpoint-url=http://localhost:4566 lambda invoke --function-name=handler --payload='' test.json

From the command line, I got error

{
    "StatusCode": 200,
    "FunctionError": "Unhandled",
    "LogResult": "",
    "ExecutedVersion": "$LATEST"
}

question from:https://stackoverflow.com/questions/65895930/getting-invalid-reference-format-error-on-localstack-when-use-aws-lambda-invo

Answer 1

Your handler is incorrect and you are missing runtime. I would also recommend using standard main.js in the form of:

exports.handler = async (event) => {
    return {
        statusCode: 200,
        body: JSON.stringify("Hi from lambda on localstack")
    }
};

Then, your aws_lambda_function with correct handler and runtime should be:

resource "aws_lambda_function" "lambda" {
  filename      = "lambda_file.zip"
  function_name = "handler"
  runtime       = "nodejs12.x"
  role          = aws_iam_role.iam_for_lambda.arn
  handler       = "main.handler"
  source_code_hash = filebase64sha256(data.archive_file.lambda_file.output_path)
}