Can't build xk6-kafka using docker to build custom binaries

[beachwood23]

The Grafana xk6 documentation page describes this way to build a k6 binary with extensions:
https://grafana.com/docs/k6/latest/extensions/#xk6-makes-custom-binaries

You have two options for creating k6 binaries: using [Go and xk6](https://grafana.com/docs/k6/latest/extensions/build-k6-binary-using-go/) or [Docker](https://grafana.com/docs/k6/latest/extensions/build-k6-binary-using-docker/):

I am using several extensions, like xk6-file and also xk6-output-statsd. So, I want to be able to build a custom binary with these two extensions and also xk6-kafka.

When I run:

docker run --rm -e GOOS=darwin -u "$(id -u):$(id -g)" -v "${PWD}:/xk6" \
  grafana/xk6 build \
  --with github.com/avitalique/xk6-file@latest \
  --with github.com/LeonAdato/xk6-output-statsd@latest \
  --with github.com/mostafa/xk6-kafka@latest

I see this failure:

2025/02/03 14:47:15 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod edit -require github.com/LeonAdato/xk6-output-statsd@latest
2025/02/03 14:47:15 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod tidy -compat=1.17
go: downloading github.com/LeonAdato/xk6-output-statsd v0.2.0
go: downloading github.com/DataDog/datadog-go v0.0.0-20180330214955-e67964b4021a
2025/02/03 14:47:16 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod edit -require github.com/mostafa/xk6-kafka@latest
2025/02/03 14:47:16 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod tidy -compat=1.17
go: downloading github.com/mostafa/xk6-kafka v0.30.0
go: github.com/mostafa/[email protected] requires go >= 1.23 (running go 1.22.7; GOTOOLCHAIN=local)
2025/02/03 14:47:16 [INFO] Cleaning up temporary folder: /tmp/buildenv_2025-02-03-1447.4082809804
2025/02/03 14:47:16 [FATAL] exit status 1

It looks like xk6-kafka requires a newer version of Go than is bundled with the Grafana xk6 docker image.

I would expect that this extension will support both ways of building that are specified in the Grafana docs.

It looks like this used to be supported, as Grafana references xk6-kafka in their docker image examples: https://hub.docker.com/r/grafana/xk6/

I can help make whatever updates necessary, if I am pointed in the right direction. Thank you!

[mostafa]

@beachwood23 Are you using the latest of version of Go loacally to build the extensions?

[beachwood23]

Hi @mostaf , I think the point of using the docker containers to build is that we will not need Go installed locally at all.

After further research, it looks like this fix worked: grafana/xk6#122

After updating my docker image with docker pull grafana/k6, my initial command above worked.

One request that might fix this, would be to add a description in the README of how people can use the docker images to build xk6-kafka instead of using the local Go toolchain. I can draft this out soon, if you like.

[mostafa]

@beachwood23 Go for it!