BackOffPullImage        = "BackOff"
)

// kubelet event reason list
const (
	NodeReady                            = "NodeReady"
	NodeNotReady                         = "NodeNotReady"
	NodeSchedulable                      = "NodeSchedulable"
	NodeNotSchedulable                   = "NodeNotSchedulable"
	StartingKubelet                      = "Starting"
	KubeletSetupFailed                   = "KubeletSetupFailed"

		if node.Spec.Unschedulable {
			kl.recordNodeStatusEvent(v1.EventTypeNormal, events.NodeNotSchedulable)
		} else {
			kl.recordNodeStatusEvent(v1.EventTypeNormal, events.NodeSchedulable)
		}
		kl.lastNodeUnschedulable = node.Spec.Unschedulable
	}
	return nil
}

// setNodeStatus fills in the Status fields of the given Node, overwriting
// any fields that are currently set.

- kube-scheduler implemented scheduling hints for the `NodeUnschedulable` plugin. The scheduling hints allowed the scheduler to only retry scheduling a Pod that had been previously rejected by the `NodeSchedulable` plugin if a new Node or a Node update had set `.spec.unschedulable` to false.
   ([#122334](https://github.com/kubernetes/kubernetes/pull/122334), [@carlory](https://github.com/carlory))

type NodeConditionType string

// These are valid but not exhaustive conditions of node. A cloud provider may set a condition not listed here.
// Relevant events contain "NodeReady", "NodeNotReady", "NodeSchedulable", and "NodeNotSchedulable".
const (
	// NodeReady means kubelet is healthy and ready to accept pods.
	NodeReady NodeConditionType = "Ready"

- `kube-scheduler` implemented scheduling hints for the `NodeUnschedulable` plugin.
  The scheduling hints allow the scheduler to only retry scheduling a `Pod`
  that was previously rejected by the `NodeSchedulable` plugin if a new `Node` or a `Node` update sets `.spec.unschedulable` to false. ([#119396](https://github.com/kubernetes/kubernetes/pull/119396), [@wackxu](https://github.com/wackxu))

)

type NodeConditionType string

// These are valid but not exhaustive conditions of node. A cloud provider may set a condition not listed here.
// Relevant events contain "NodeReady", "NodeNotReady", "NodeSchedulable", and "NodeNotSchedulable".
const (
	// NodeReady means kubelet is healthy and ready to accept pods.
	NodeReady NodeConditionType = "Ready"