config

Documentation

Overview

Package config contains the config for the autoscaler

Index

• Constants
• type Config
  • func NewConfigFromConfigMap(configMap *corev1.ConfigMap) (*Config, error)
  • func NewConfigFromMap(data map[string]string) (*Config, error)
  • func (in *Config) DeepCopy() *Config
  • func (in *Config) DeepCopyInto(out *Config)

Constants

const (
	// ConfigName is the name of the config map of the autoscaler.
	ConfigName = "config-autoscaler"

	// BucketSize is the size of the buckets of stats we create.
	// NB: if this is more than 1s, we need to average values in the
	// metrics buckets.
	BucketSize = 1 * time.Second
)

Types

type Config

type Config struct {
	// Feature flags.
	EnableScaleToZero bool

	// Target concurrency knobs for different container concurrency configurations.
	ContainerConcurrencyTargetFraction float64
	ContainerConcurrencyTargetDefault  float64
	// TargetUtilization is used for the metrics other than concurrency. This is not
	// configurable now. Customers can override it by specifying
	// autoscaling.knative.dev/targetUtilizationPercentage in Revision annotation.
	// TODO(yanweiguo): Expose this to config-autoscaler configmap and eventually
	// deprecate ContainerConcurrencyTargetFraction.
	TargetUtilization float64
	// RPSTargetDefault is the default target value for requests per second.
	RPSTargetDefault float64
	// NB: most of our computations are in floats, so this is float to avoid casting.
	TargetBurstCapacity float64

	// ActivatorCapacity is the number of the concurrent requests an activator
	// task can accept. This is used in activator subsetting algorithm, to determine
	// the number of activators per revision.
	ActivatorCapacity float64

	// AllowZeroInitialScale indicates whether InitialScale and
	// autoscaling.internal.knative.dev/initialScale are allowed to be set to 0.
	AllowZeroInitialScale bool

	// InitialScale is the cluster-wide default initial revision size for newly deployed
	// services. This can be set to 0 iff AllowZeroInitialScale is true.
	InitialScale int32

	// General autoscaler algorithm configuration.
	MaxScaleUpRate           float64
	MaxScaleDownRate         float64
	StableWindow             time.Duration
	PanicWindowPercentage    float64
	PanicThresholdPercentage float64

	ScaleToZeroGracePeriod        time.Duration
	ScaleToZeroPodRetentionPeriod time.Duration

	PodAutoscalerClass string
}

Config defines the tunable autoscaler parameters +k8s:deepcopy-gen=true

func NewConfigFromConfigMap

func NewConfigFromConfigMap(configMap *corev1.ConfigMap) (*Config, error)

NewConfigFromConfigMap creates a Config from the supplied ConfigMap

func NewConfigFromMap

func NewConfigFromMap(data map[string]string) (*Config, error)

NewConfigFromMap creates a Config from the supplied map

func (*Config) DeepCopy

func (in *Config) DeepCopy() *Config

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Config.

func (*Config) DeepCopyInto

func (in *Config) DeepCopyInto(out *Config)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.