core

Documentation

Index

• Constants
• type Autoscaler
  • func NewAutoscaler(opts AutoscalerOptions, informerFactory informers.SharedInformerFactory) (Autoscaler, errors.AutoscalerError)
• type AutoscalerOptions
• type StaticAutoscaler
  • func NewStaticAutoscaler(opts config.AutoscalingOptions, fwHandle *framework.Handle, ...) *StaticAutoscaler
  • func (a *StaticAutoscaler) ExitCleanUp()
  • func (a *StaticAutoscaler) LastScaleDownDeleteTime() time.Time
  • func (a *StaticAutoscaler) LastScaleUpTime() time.Time
  • func (a *StaticAutoscaler) RunOnce(currentTime time.Time) caerrors.AutoscalerError
  • func (a *StaticAutoscaler) Start() error

Constants

const (

	// NodeUpcomingAnnotation is an annotation CA adds to nodes which are upcoming.
	NodeUpcomingAnnotation = "cluster-autoscaler.k8s.io/upcoming-node"
)

Types

type Autoscaler

type Autoscaler interface {
	// Start starts components running in background.
	Start() error
	// RunOnce represents an iteration in the control-loop of CA
	RunOnce(currentTime time.Time) errors.AutoscalerError
	// ExitCleanUp is a clean-up performed just before process termination.
	ExitCleanUp()
	// LastScaleUpTime is a time of the last scale up
	LastScaleUpTime() time.Time
	// LastScaleUpTime is a time of the last scale down
	LastScaleDownDeleteTime() time.Time
}

Autoscaler is the main component of CA which scales up/down node groups according to its configuration The configuration can be injected at the creation of an autoscaler

func NewAutoscaler

func NewAutoscaler(opts AutoscalerOptions, informerFactory informers.SharedInformerFactory) (Autoscaler, errors.AutoscalerError)

NewAutoscaler creates an autoscaler of an appropriate type according to the parameters

type AutoscalerOptions

type AutoscalerOptions struct {
	config.AutoscalingOptions
	KubeClient             kube_client.Interface
	InformerFactory        informers.SharedInformerFactory
	AutoscalingKubeClients *context.AutoscalingKubeClients
	CloudProvider          cloudprovider.CloudProvider
	FrameworkHandle        *framework.Handle
	ClusterSnapshot        clustersnapshot.ClusterSnapshot
	ExpanderStrategy       expander.Strategy
	EstimatorBuilder       estimator.EstimatorBuilder
	Processors             *ca_processors.AutoscalingProcessors
	LoopStartNotifier      *loopstart.ObserversList
	Backoff                backoff.Backoff
	DebuggingSnapshotter   debuggingsnapshot.DebuggingSnapshotter
	RemainingPdbTracker    pdb.RemainingPdbTracker
	ScaleUpOrchestrator    scaleup.Orchestrator
	DeleteOptions          options.NodeDeleteOptions
	DrainabilityRules      rules.Rules
}

AutoscalerOptions is the whole set of options for configuring an autoscaler

type StaticAutoscaler

type StaticAutoscaler struct {
	// AutoscalingContext consists of validated settings and options for this autoscaler
	*context.AutoscalingContext
	// contains filtered or unexported fields
}

StaticAutoscaler is an autoscaler which has all the core functionality of a CA but without the reconfiguration feature

func NewStaticAutoscaler

func NewStaticAutoscaler(
	opts config.AutoscalingOptions,
	fwHandle *framework.Handle,
	clusterSnapshot clustersnapshot.ClusterSnapshot,
	autoscalingKubeClients *context.AutoscalingKubeClients,
	processors *ca_processors.AutoscalingProcessors,
	loopStartNotifier *loopstart.ObserversList,
	cloudProvider cloudprovider.CloudProvider,
	expanderStrategy expander.Strategy,
	estimatorBuilder estimator.EstimatorBuilder,
	backoff backoff.Backoff,
	debuggingSnapshotter debuggingsnapshot.DebuggingSnapshotter,
	remainingPdbTracker pdb.RemainingPdbTracker,
	scaleUpOrchestrator scaleup.Orchestrator,
	deleteOptions options.NodeDeleteOptions,
	drainabilityRules rules.Rules) *StaticAutoscaler

NewStaticAutoscaler creates an instance of Autoscaler filled with provided parameters

func (*StaticAutoscaler) ExitCleanUp

func (a *StaticAutoscaler) ExitCleanUp()

ExitCleanUp performs all necessary clean-ups when the autoscaler's exiting.

func (*StaticAutoscaler) LastScaleDownDeleteTime

func (a *StaticAutoscaler) LastScaleDownDeleteTime() time.Time

LastScaleDownDeleteTime returns the last successful scale down time

func (*StaticAutoscaler) LastScaleUpTime

func (a *StaticAutoscaler) LastScaleUpTime() time.Time

LastScaleUpTime returns last scale up time

func (*StaticAutoscaler) RunOnce

func (a *StaticAutoscaler) RunOnce(currentTime time.Time) caerrors.AutoscalerError

RunOnce iterates over node groups and scales them up/down if necessary

func (*StaticAutoscaler) Start

func (a *StaticAutoscaler) Start() error

Start starts components running in background.