"PathError" when deploying Go project to AWS Lambda

Question

When deploying this Go-based AWS Lambda project, via AWS console, I receive:

{
  "errorMessage": "fork/exec /var/task/main: exec format error",
  "errorType": "PathError"
}

Here are the steps I took:

• downloaded the marriage-master project from Git
• in Terminal, go get "github.com/aws/aws-lambda-go/lambda" so the script is buildable by Go
• in Terminal, go build main.go to create file Lambda will use to execute
• in Terminal, zip main.zip main to archive the file into a .zip for deployment to Lambda
• in AWS Console, upload main.zip to Function code

• in AWS Console, changed Handler to main.

But I keep getting this path error. Any idea what I'm doing wrong?

Answer 1

To deploy a Go app in AWS Lambda, run the following commands:

1. Build the binary targeted to Linux OS and amd64 architecture

   GOARCH=amd64 GOOS=linux go build main.go -ldflags="-s -w"

2. Zip the binary

   zip lambda.zip main

3. Upload this binary from AWS Lambda console directly or Put it in an S3 bucket and import it.

You have taken care of the lambda configuration already.

Answer 2

Try without flags:

GOARCH=amd64 GOOS=linux go build main.go