Adds support for cgroupv2 based on the common cgroup interface.
The cgroupv2 implementation mostly mirrors the structure of cgroupv1,
with many helper functions derived from containerd/cgroups and opencontainers/runc
implementations. We implemented the following controllers: cpu, cpuset, memory,
io, pids, hugetlb.
In order to avoid upgrading containerd dependency (to get oom poller
implementation), we copied the oom poller implementation for cgroupv2
into shim/oom_v2.go. This requires containerd/cgroups dependency to have
cgroupv2 support which we already have.
Signed-off-by: Daniel Dao <dqminh89@gmail.com>
gvisor-containerd-shim is not compatible with containerd 1.1 or earlier.
Starting from containerd 1.2, shim v2 is the preferred interface.
PiperOrigin-RevId: 351485556
Daniel Dao
Jamie Liu
Fabricio Voznika