podautoscaler

Documentation

Overview

Package podautoscaler contains logic for autoscaling number of pods based on metrics observed.

Index

• func UnsafeConvertToVersionVia(obj runtime.Object, externalVersion schema.GroupVersion) (runtime.Object, error)
• type HorizontalController
  • func NewHorizontalController(evtNamespacer v1core.EventsGetter, ...) *HorizontalController
  • func (a *HorizontalController) Run(stopCh <-chan struct{})
• type ReplicaCalculator
  • func NewReplicaCalculator(metricsClient metricsclient.MetricsClient, podsGetter v1coreclient.PodsGetter) *ReplicaCalculator
  • func (c *ReplicaCalculator) GetMetricReplicas(currentReplicas int32, targetUtilization int64, metricName string, ...) (replicaCount int32, utilization int64, timestamp time.Time, err error)
  • func (c *ReplicaCalculator) GetObjectMetricReplicas(currentReplicas int32, targetUtilization int64, metricName string, ...) (replicaCount int32, utilization int64, timestamp time.Time, err error)
  • func (c *ReplicaCalculator) GetRawResourceReplicas(currentReplicas int32, targetUtilization int64, resource v1.ResourceName, ...) (replicaCount int32, utilization int64, timestamp time.Time, err error)
  • func (c *ReplicaCalculator) GetResourceReplicas(currentReplicas int32, targetUtilization int32, resource v1.ResourceName, ...) (replicaCount int32, utilization int32, rawUtilization int64, ...)

Functions

func UnsafeConvertToVersionVia

func UnsafeConvertToVersionVia(obj runtime.Object, externalVersion schema.GroupVersion) (runtime.Object, error)

UnsafeConvertToVersionVia is like api.Scheme.UnsafeConvertToVersion, but it does so via an internal version first. We use it since working with v2alpha1 is convenient here, but we want to use the v1 client (and can't just use the internal version). Note that conversion mutates the object, so you need to deepcopy *before* you call this if the input object came out of a shared cache.

Types

type HorizontalController

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

func NewHorizontalController

func NewHorizontalController(
	evtNamespacer v1core.EventsGetter,
	scaleNamespacer extensionsclient.ScalesGetter,
	hpaNamespacer autoscalingclient.HorizontalPodAutoscalersGetter,
	replicaCalc *ReplicaCalculator,
	hpaInformer autoscalinginformers.HorizontalPodAutoscalerInformer,
	resyncPeriod time.Duration,
) *HorizontalController

func (*HorizontalController) Run

func (a *HorizontalController) Run(stopCh <-chan struct{})

type ReplicaCalculator

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

func NewReplicaCalculator

func NewReplicaCalculator(metricsClient metricsclient.MetricsClient, podsGetter v1coreclient.PodsGetter) *ReplicaCalculator

func (*ReplicaCalculator) GetMetricReplicas

func (c *ReplicaCalculator) GetMetricReplicas(currentReplicas int32, targetUtilization int64, metricName string, namespace string, selector labels.Selector) (replicaCount int32, utilization int64, timestamp time.Time, err error)

GetMetricReplicas calculates the desired replica count based on a target metric utilization (as a milli-value) for pods matching the given selector in the given namespace, and the current replica count

func (*ReplicaCalculator) GetObjectMetricReplicas

func (c *ReplicaCalculator) GetObjectMetricReplicas(currentReplicas int32, targetUtilization int64, metricName string, namespace string, objectRef *autoscaling.CrossVersionObjectReference) (replicaCount int32, utilization int64, timestamp time.Time, err error)

GetObjectMetricReplicas calculates the desired replica count based on a target metric utilization (as a milli-value) for the given object in the given namespace, and the current replica count.

func (*ReplicaCalculator) GetRawResourceReplicas

func (c *ReplicaCalculator) GetRawResourceReplicas(currentReplicas int32, targetUtilization int64, resource v1.ResourceName, namespace string, selector labels.Selector) (replicaCount int32, utilization int64, timestamp time.Time, err error)

GetRawResourceReplicas calculates the desired replica count based on a target resource utilization (as a raw milli-value) for pods matching the given selector in the given namespace, and the current replica count

func (*ReplicaCalculator) GetResourceReplicas

func (c *ReplicaCalculator) GetResourceReplicas(currentReplicas int32, targetUtilization int32, resource v1.ResourceName, namespace string, selector labels.Selector) (replicaCount int32, utilization int32, rawUtilization int64, timestamp time.Time, err error)

GetResourceReplicas calculates the desired replica count based on a target resource utilization percentage of the given resource for pods matching the given selector in the given namespace, and the current replica count