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b57e146aec
If /var/lib/kubelet is MS_SHARED mountpoint, all the mountpoints
under /var/lib/kubelet will have duplicate one. When `kubeadm reset -f`
is executed, it will try to umount one path twice. However, they are in
the peer group. Once we umount one path, the duplicate one will be
umounted as well. So, in this case, we should ignore EINVAL error.
Signed-off-by: Wei Fu <fuweid89@gmail.com>
(cherry picked from commit 2634261c17)
Signed-off-by: Wei Fu <fuweid89@gmail.com>