pub fn remove_host_container_cgroup(container_id: &str)Expand description
Best-effort removal of the host-mode container cgroup at
/sys/fs/cgroup/zlayer/containers/<container_id>.
libcontainer’s delete() normally reaps the leaf cgroup, but
systemd-cgroup races and cgroup-v2 unified hiccups can leave a stale, empty
directory behind. Because the next create_container rebuilds the same
<root>/containers/<id> path, that orphan trips libcontainer’s build()
with could not delete on restart/scale. This reaps it directly at the
real path (the old read_dir-the-mount scan never matched two levels down).
Idempotent (NotFound is ignored) and best-effort (EBUSY/other errors are
logged, not propagated). No-op on non-Linux.