Custom k6 doesn't compile due to opentelemetry module

[agilob]

Hi all,

I wanted to use the new k6 but we have a few custom extensions that we need to build to run perf tests. I tried to bump dependencies of the extensions, but can't compile k6 due to:

2024/08/13 15:46:00 [INFO] exec (timeout=0s): /usr/bin/go build -o /home/agilob/Projects/k6-utils/k6 -ldflags=-w -s -trimpath
# go.opentelemetry.io/otel/sdk/metric
/home/agilob/go/pkg/mod/go.opentelemetry.io/otel/sdk/[email protected]/meter.go:76:22: cannot use (*meter)(nil) (value of type *meter) as "go.opentelemetry.io/otel/metric".Meter value in variable declaration: *meter does not implement "go.opentelemetry.io/otel/metric".Meter (missing method Float64Gauge)
/home/agilob/go/pkg/mod/go.opentelemetry.io/otel/sdk/[email protected]/provider.go:101:9: cannot use mp.meters.Lookup(s, func() *meter {…}) (value of type *meter) as "go.opentelemetry.io/otel/metric".Meter value in return statement: *meter does not implement "go.opentelemetry.io/otel/metric".Meter (missing method Float64Gauge)
2024/08/13 15:46:00 [INFO] Cleaning up temporary folder: /tmp/buildenv_2024-08-13-1545.3210944102
2024/08/13 15:46:00 [FATAL] exit status 1

I'm trying to upgrade k6 in this repo https:/b4dc0d3rs/k6-utils and execute:

xk6 build v0.53.0 \
  --with github.com/b4dc0d3rs/k6-utils=.

[olegbespalov]

Hey @agilob !

Thanks for report!

I believe it happens because the b4dc0d3rs/k6-utils has opentelemetry library of a higher version than bumped in k6. In any case, we will update the k6's open telemetry soon, so I'll update you here once we merge the PR in k6.

[agilob]

This was automatically changed by go get -u && go mod tidy

[olegbespalov]

This was automatically changed by go get -u && go mod tidy

Well, unfortunately, automatic does not always work as we expect 😢

I've opened PR #22, it has not been reviewed and merged, and there may be a couple of things more we'll need to do in k6 itself, but here is a workaround on how to build a k6 --replace "github.com/grafana/xk6-output-opentelemetry=github.com/grafana/xk6-output-opentelemetry@62cb2dc39b1f7b5898fe17ee91adbed1244a113e"

Example:

 docker run --rm -it -v "${PWD}:/xk6" grafana/xk6 build v0.53.0 \
  --replace "github.com/grafana/xk6-output-opentelemetry=github.com/grafana/xk6-output-opentelemetry@62cb2dc39b1f7b5898fe17ee91adbed1244a113e" \
  --with github.com/b4dc0d3rs/k6-utils@main

[olegbespalov]

I am closing this as the actual k6 master branch now, including all the updates.