Version: v0.0.0-...-e6272b8 Latest Latest

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Published: Mar 19, 2019 License: Apache-2.0 Imports: 39 Imported by: 0




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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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