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var (
	// UnreachableTaintTemplate is the taint for when a node becomes unreachable.
	UnreachableTaintTemplate = &v1.Taint{
		Key:    schedulerapi.TaintNodeUnreachable,
		Effect: v1.TaintEffectNoExecute,

	// NotReadyTaintTemplate is the taint for when a node is not ready for
	// executing pods
	NotReadyTaintTemplate = &v1.Taint{
		Key:    schedulerapi.TaintNodeNotReady,
		Effect: v1.TaintEffectNoExecute,


func Register

func Register()

    Register the metrics that are to be monitored.


    type Controller

    type Controller struct {
    	// contains filtered or unexported fields

      Controller is the controller that manages node's life cycle.

      func NewNodeLifecycleController

      func NewNodeLifecycleController(
      	leaseInformer coordinformers.LeaseInformer,
      	podInformer coreinformers.PodInformer,
      	nodeInformer coreinformers.NodeInformer,
      	daemonSetInformer appsv1informers.DaemonSetInformer,
      	kubeClient clientset.Interface,
      	nodeMonitorPeriod time.Duration,
      	nodeStartupGracePeriod time.Duration,
      	nodeMonitorGracePeriod time.Duration,
      	podEvictionTimeout time.Duration,
      	evictionLimiterQPS float32,
      	secondaryEvictionLimiterQPS float32,
      	largeClusterThreshold int32,
      	unhealthyZoneThreshold float32,
      	runTaintManager bool,
      	useTaintBasedEvictions bool,
      	taintNodeByCondition bool) (*Controller, error)

        NewNodeLifecycleController returns a new taint controller.

        func (*Controller) ComputeZoneState

        func (nc *Controller) ComputeZoneState(nodeReadyConditions []*v1.NodeCondition) (int, ZoneState)

          ComputeZoneState returns a slice of NodeReadyConditions for all Nodes in a given zone. The zone is considered: - fullyDisrupted if there're no Ready Nodes, - partiallyDisrupted if at least than nc.unhealthyZoneThreshold percent of Nodes are not Ready, - normal otherwise

          func (*Controller) HealthyQPSFunc

          func (nc *Controller) HealthyQPSFunc(nodeNum int) float32

            HealthyQPSFunc returns the default value for cluster eviction rate - we take nodeNum for consistency with ReducedQPSFunc.

            func (*Controller) ReducedQPSFunc

            func (nc *Controller) ReducedQPSFunc(nodeNum int) float32

              ReducedQPSFunc returns the QPS for when a the cluster is large make evictions slower, if they're small stop evictions altogether.

              func (*Controller) Run

              func (nc *Controller) Run(stopCh <-chan struct{})

                Run starts an asynchronous loop that monitors the status of cluster nodes.

                type ZoneState

                type ZoneState string

                  ZoneState is the state of a given zone.


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