scaler

Documentation

Index

• func CreateMergePatch(original, new interface{}) ([]byte, error)
• func GetPodCondition(status *v1.PodStatus, conditionType v1.PodConditionType) (int, *v1.PodCondition)
• func GetPodConditionFromList(conditions []v1.PodCondition, conditionType v1.PodConditionType) (int, *v1.PodCondition)
• func GetPodReadyCondition(status v1.PodStatus) *v1.PodCondition
• func IsPodReady(pod *v1.Pod) bool
• func IsPodReadyConditionTrue(status v1.PodStatus) bool
• func NewDefaultGPARateLimiter(interval time.Duration) workqueue.RateLimiter
• func NewFixedItemIntervalRateLimiter(interval time.Duration) workqueue.RateLimiter
• type FixedItemIntervalRateLimiter
  • func (r *FixedItemIntervalRateLimiter) Forget(item interface{})
  • func (r *FixedItemIntervalRateLimiter) NumRequeues(item interface{}) int
  • func (r *FixedItemIntervalRateLimiter) When(item interface{}) time.Duration
• type GeneralController
  • func NewGeneralController(evtNamespacer v1core.EventsGetter, scaleNamespacer scaleclient.ScalesGetter, ...) *GeneralController
  • func (a *GeneralController) Run(stopCh <-chan struct{})
• type NormalizationArg
• type ReplicaCalculator
  • func NewReplicaCalculator(metricsClient metricsclient.MetricsClient, podLister corelisters.PodLister, ...) *ReplicaCalculator
  • func (c *ReplicaCalculator) GetExternalMetricReplicas(currentReplicas int32, targetUtilization int64, metricName, namespace string, ...) (replicaCount int32, utilization int64, timestamp time.Time, err error)
  • func (c *ReplicaCalculator) GetExternalPerPodMetricReplicas(statusReplicas int32, targetUtilizationPerPod int64, ...) (replicaCount int32, utilization int64, timestamp time.Time, err error)
  • 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) GetObjectPerPodMetricReplicas(statusReplicas int32, targetAverageUtilization 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 CreateMergePatch

func CreateMergePatch(original, new interface{}) ([]byte, error)

CreateMergePatch return patch generated from original and new interfaces

func GetPodCondition

func GetPodCondition(status *v1.PodStatus, conditionType v1.PodConditionType) (int, *v1.PodCondition)

GetPodCondition extracts the provided condition from the given status and returns that. Returns nil and -1 if the condition is not present, and the index of the located condition.

func GetPodConditionFromList

func GetPodConditionFromList(conditions []v1.PodCondition, conditionType v1.PodConditionType) (int, *v1.PodCondition)

GetPodConditionFromList extracts the provided condition from the given list of condition and returns the index of the condition and the condition. Returns -1 and nil if the condition is not present.

func GetPodReadyCondition

func GetPodReadyCondition(status v1.PodStatus) *v1.PodCondition

GetPodReadyCondition extracts the pod ready condition from the given status and returns that. Returns nil if the condition is not present.

func IsPodReady

func IsPodReady(pod *v1.Pod) bool

IsPodReady returns true if a pod is ready; false otherwise.

func IsPodReadyConditionTrue

func IsPodReadyConditionTrue(status v1.PodStatus) bool

IsPodReadyConditionTrue returns true if a pod is ready; false otherwise.

func NewDefaultGPARateLimiter

func NewDefaultGPARateLimiter(interval time.Duration) workqueue.RateLimiter

NewDefaultGPARateLimiter creates a rate limiter which limits overall (as per the default controller rate limiter), as well as per the resync interval

func NewFixedItemIntervalRateLimiter

func NewFixedItemIntervalRateLimiter(interval time.Duration) workqueue.RateLimiter

NewFixedItemIntervalRateLimiter creates a new instance of a RateLimiter using a fixed interval

Types

type FixedItemIntervalRateLimiter

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

FixedItemIntervalRateLimiter limits items to a fixed-rate interval

func (*FixedItemIntervalRateLimiter) Forget

func (r *FixedItemIntervalRateLimiter) Forget(item interface{})

Forget indicates that an item is finished being retried.

func (*FixedItemIntervalRateLimiter) NumRequeues

func (r *FixedItemIntervalRateLimiter) NumRequeues(item interface{}) int

NumRequeues returns back how many failures the item has had

func (*FixedItemIntervalRateLimiter) When

func (r *FixedItemIntervalRateLimiter) When(item interface{}) time.Duration

When returns the interval of the rate limiter

type GeneralController

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

GeneralController is responsible for the synchronizing GPA objects stored in the system with the actual deployments/replication controllers they control.

func NewGeneralController

func NewGeneralController(
	evtNamespacer v1core.EventsGetter,
	scaleNamespacer scaleclient.ScalesGetter,
	gpaNamespacer autoscalingclient.GeneralPodAutoscalersGetter,
	mapper apimeta.RESTMapper,
	metricsClient metricsclient.MetricsClient,
	gpaInformer autoscalinginformers.GeneralPodAutoscalerInformer,
	podInformer coreinformers.PodInformer,
	resyncPeriod time.Duration,
	downscaleStabilisationWindow time.Duration,
	tolerance float64,
	cpuInitializationPeriod,
	delayOfInitialReadinessStatus time.Duration,

) *GeneralController

NewGeneralController creates a new GeneralController.

func (*GeneralController) Run

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

Run begins watching and syncing.

type NormalizationArg

type NormalizationArg struct {
	Key               string
	ScaleUpBehavior   *autoscaling.GPAScalingRules
	ScaleDownBehavior *autoscaling.GPAScalingRules
	MinReplicas       int32
	MaxReplicas       int32
	CurrentReplicas   int32
	DesiredReplicas   int32
}

NormalizationArg is used to pass all needed information between functions as one structure

type ReplicaCalculator

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

ReplicaCalculator bundles all needed information to calculate the target amount of replicas

func NewReplicaCalculator

func NewReplicaCalculator(metricsClient metricsclient.MetricsClient, podLister corelisters.PodLister, tolerance float64, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) *ReplicaCalculator

NewReplicaCalculator creates a new ReplicaCalculator and passes all necessary information to the new instance

func (*ReplicaCalculator) GetExternalMetricReplicas

func (c *ReplicaCalculator) GetExternalMetricReplicas(currentReplicas int32, targetUtilization int64, metricName, namespace string, metricSelector *metav1.LabelSelector, podSelector labels.Selector) (replicaCount int32, utilization int64, timestamp time.Time, err error)

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

func (*ReplicaCalculator) GetExternalPerPodMetricReplicas

func (c *ReplicaCalculator) GetExternalPerPodMetricReplicas(statusReplicas int32, targetUtilizationPerPod int64, metricName, namespace string, metricSelector *metav1.LabelSelector) (replicaCount int32, utilization int64, timestamp time.Time, err error)

GetExternalPerPodMetricReplicas calculates the desired replica count based on a target metric value per pod (as a milli-value) for the external metric in the given namespace, and the current replica count.

func (*ReplicaCalculator) GetMetricReplicas

func (c *ReplicaCalculator) GetMetricReplicas(currentReplicas int32, targetUtilization int64, metricName string, namespace string, selector labels.Selector, metricSelector 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, selector labels.Selector, metricSelector labels.Selector) (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) GetObjectPerPodMetricReplicas

func (c *ReplicaCalculator) GetObjectPerPodMetricReplicas(statusReplicas int32, targetAverageUtilization int64, metricName string, namespace string, objectRef *autoscaling.CrossVersionObjectReference, metricSelector labels.Selector) (replicaCount int32, utilization int64, timestamp time.Time, err error)

GetObjectPerPodMetricReplicas 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, container string) (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, container string, computeResourceUtilizationRatioByLimits bool) (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