monitoring package is not usable on MacOS

[matej-g]

See the report in thanos-io/thanos#4642.

The monitoring package uses github.com/containerd/cgroups, which seem to include code usable only on Linux platforms. We should find a way to make code from monitoring run on MacOS as well.

[bwplotka]

👍🏽

[matej-g]

It seems to me this would not be a trivial fix, since the monitoring package depends on working with cgroups and using https://github.com/containerd/cgroups, which is not really available on MacOS.

Other option that comes to mind would be to not enable the option WithCurrentProcessAsContainer on MacOS (I think we only use cgroups package because of it) and make the compilation conditional on which system it is running on. This would allow usage of monitoring package on MacOS, just without the current container option.