Support macOS Metrics When CGO Is On

[EddieV2]

Component(s)

receiver/hostmetrics

Describe the issue you're reporting

Currently, CPU and Disk scrapers are not supported on macOS due to the lack of CGO. I understand that this is due to complications with CGO, so I'm asking for these Mac metrics to be turned on while CGO is on.

[github-actions]

Pinging code owners:

• receiver/hostmetrics: @dmitryax @braydonk

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[pureklkl]

open-telemetry/opentelemetry-collector-releases#374
cgo support was rejected before.

You can build your own collector that supports cgo by setting CGO_ENABLED=1.
https://github.com/open-telemetry/opentelemetry-collector-releases/blob/main/distributions/otelcol-contrib/.goreleaser.yaml#L49
It will support Mac cpu if it was compiled on Mac, otherwise you will need to set up a cross compile environment.

[atoulme]

Because it was rejected before for linux doesn't preclude we don't consider it for Mac OS.

[pureklkl]

There are 2 options to support it

1. Build a cross compiling environment. It need some effort, example, there is a github action for cgo compilation.
2. Use a mac runner which is 10x expensive than the linux runner ref, but it saves a lot of effort to maintain the cross compiling environment, example, telegraf

And we will still need mac runners for testing, example, iostat_darwin.

[atoulme]

Sure, are you interested in working on this?

[pureklkl]

Yes, please assign to me, I will try the mac runner first.

[atoulme]

ok, if you'd like, you can request a mac runner in the same manner as this large runner was asked for: open-telemetry/community#2156

[pureklkl]

@atoulme @EddieV2
Do we need to support the old Mac OS versions?
Currently, we can only guarantee that the binary will run on latest mac version (macos-14), because it was compiled and tested on that runner.
I have tested the macos-14 compiled binary on macos-12 and macos-13 and it is working, but if we want to support them officially, we would better to add tests for them.

[EddieV2]

@atoulme @EddieV2
Do we need to support the old Mac OS versions?
Currently, we can only guarantee that the binary will run on latest mac version (macos-14), because it was compiled and tested on that runner.
I have tested the macos-14 compiled binary on macos-12 and macos-13 and it is working, but if we want to support them officially, we would better to add tests for them.

Hi @pureklkl, we would want to cover 13, 14, and 15 considering that release will be soon as well and we're preparing for that. 12 would be nice, but isn't much of a concern for us considering 15 being released soon.

[github-actions]

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Pinging code owners:

• receiver/hostmetrics: @dmitryax @braydonk

See Adding Labels via Comments if you do not have permissions to add labels yourself.