nodelifecycle

Documentation

Index

• Variables
• func Register()
• type Controller
  • func NewNodeLifecycleController(ctx context.Context, leaseInformer coordinformers.LeaseInformer, ...) (*Controller, error)
  • func (nc *Controller) ComputeZoneState(nodeReadyConditions []*v1.NodeCondition) (int, ZoneState)
  • func (nc *Controller) HealthyQPSFunc(nodeNum int) float32
  • func (nc *Controller) ReducedQPSFunc(nodeNum int) float32
  • func (nc *Controller) Run(ctx context.Context)
• type ZoneState

Variables

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

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

Functions

func Register

func Register()

Register the metrics that are to be monitored.

Types

type Controller

type Controller struct {
	// contains filtered or unexported fields
}

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

func NewNodeLifecycleController

func NewNodeLifecycleController(
	ctx context.Context,
	leaseInformer coordinformers.LeaseInformer,
	podInformer coreinformers.PodInformer,
	nodeInformer coreinformers.NodeInformer,
	daemonSetInformer appsv1informers.DaemonSetInformer,
	kubeClient clientset.Interface,
	nodeMonitorPeriod time.Duration,
	nodeStartupGracePeriod time.Duration,
	nodeMonitorGracePeriod time.Duration,
	evictionLimiterQPS float32,
	secondaryEvictionLimiterQPS float32,
	largeClusterThreshold int32,
	unhealthyZoneThreshold float32,
) (*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 the cluster is large make evictions slower, if they're small stop evictions altogether.

func (*Controller) Run

func (nc *Controller) Run(ctx context.Context)

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.