21zoo Labs - Assorted Stuff

Migrate AWS Lambda Golang Functions to the "al2.provided" Runtime

Posted — Aug 23, 2023

AWS is deprecating the go1.x runtime on Lambda and it’s time to udpate your Golang lambda functions. Functions need to migrate to the al2.provided runtime and it’s pretty straight-forward. In the AWS console select al2.provided as the new runtime and when you compile your Golang handler you need to create an executable named bootstrap.

Here’s a sample Golang lambda program:

package main

import (


type MyEvent struct {
  Name string `json:"name"`

func HandleRequest(ctx context.Context, event MyEvent) (string, error) {
  return fmt.Sprintf("Hello from Lambda, %s!", event.Name), nil

func main() {

Build it (this is for Graviton - if you (have to) use Intel then use GOARCH=amd64):

GOARCH=arm64 GOOS=linux go build -o bootstrap .

Zip up the executable (and anything related that is needed):

zip myFunction.zip bootstrap

And now you can use that zip to deploy your function.