[receiver/hostmetrics] Support collecting process cgroup as dimension

[atoulme]

Component(s)

receiver/hostmetrics

Is your feature request related to a problem? Please describe.

I would like to collect the cgroup associated with a process when collecting process information through the hostmetrics receiver.

Describe the solution you'd like

The cgroup information should be offered as an additional dimension of the metric related to processes.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• receiver/hostmetrics: @dmitryax

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[atoulme]

Opening a PR to support collect cgroup info in gopsutil: shirou/gopsutil#1552

[andrzej-stencel]

I suppose it makes sense. Do you want to assign yourself to the issue?

[atoulme]

gopsutil turned down the enhancement of exposing cgroups, but we can probably perform this data capture in the receiver instead directly. I will turn my attention to that aspect.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• receiver/hostmetrics: @dmitryax @braydonk

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