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9dbe943491
This PR contains Kubelet changes to enable attach/detach controller control. * It introduces a new "enable-controller-attach-detach" kubelet flag to enable control by controller. Default enabled. * It removes all references "SafeToDetach" annoation from controller. * It adds the new VolumesInUse field to the Node Status API object. * It modifies the controller to use VolumesInUse instead of SafeToDetach annotation to gate detachment. * There is a bug in node-problem-detector that causes VolumesInUse to get reset every 30 seconds. Issue https://github.com/kubernetes/node-problem-detector/issues/9 opened to fix that.