[RFC] Upgrade containerd/cgroups #1356
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This PR shows the way to upgrade containerd/cgroups.
Why?
We have migrated from gogo/protobuf to Google's official protobuf package in containerd/containerd and containerd/cgroups, since gogo/protobuf was sadly deprecated by the authors.
Since hcsshim is embedding containerd/cgroups' proto-generated structs in its own stats structs, in order to upgrade containerd/cgroups, we have to use Google's protobuf package to generate the stats structs.
Do we really need to upgrade containerd/cgroups right now?
No. The migration PR has been merged after all bug fixes. In addition to that, we agreed to have a new branch for folks who cannot use Google's protobuf package at this time.