core

type Autoscaler interface {
	// RunOnce represents an iteration in the control-loop of CA
	RunOnce(currentTime time.Time) errors.AutoscalerError
	// CleanUp represents a clean-up required before the first invocation of RunOnce
	CleanUp()
	// ExitCleanUp is a clean-up performed just before process termination.
	ExitCleanUp()
}

type AutoscalerBuilder interface {
	SetDynamicConfig(config dynamic.Config) AutoscalerBuilder
	Build() (Autoscaler, errors.AutoscalerError)
}

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

type AutoscalerOptions struct {
	AutoscalingOptions
	dynamic.ConfigFetcherOptions
}

type AutoscalingContext struct {
	// Options to customize how autoscaling works
	AutoscalingOptions
	// CloudProvider used in CA.
	CloudProvider cloudprovider.CloudProvider
	// CloudProviderBuilder is used to new CloudProvider
	CloudProviderBuilder builder.CloudProviderBuilder
	// ClientSet interface.
	ClientSet kube_client.Interface
	// ClusterState for maintaining the state of custer nodes.
	ClusterStateRegistry *clusterstate.ClusterStateRegistry
	// Recorder for recording events.
	Recorder kube_record.EventRecorder
	// PredicateChecker to check if a pod can fit into a node.
	PredicateChecker *simulator.PredicateChecker
	// ExpanderStrategy is the strategy used to choose which node group to expand when scaling up
	ExpanderStrategy expander.Strategy
	// LogRecorder can be used to collect log messages to expose via Events on some central object.
	LogRecorder *utils.LogEventRecorder
}

type AutoscalingOptions struct {
	// MaxEmptyBulkDelete is a number of empty nodes that can be removed at the same time.
	MaxEmptyBulkDelete int
	// ScaleDownUtilizationThreshold sets threshould for nodes to be considered for scale down.
	// Well-utilized nodes are not touched.
	ScaleDownUtilizationThreshold float64
	// ScaleDownUnneededTime sets the duriation CA exepects a node to be unneded/eligible for removal
	// before scaling down the node.
	ScaleDownUnneededTime time.Duration
	// ScaleDownUnreadyTime represents how long an unready node should be unneeded before it is eligible for scale down
	ScaleDownUnreadyTime time.Duration
	// MaxNodesTotal sets the maximum number of nodes in the whole cluster
	MaxNodesTotal int
	// NodeGroupAutoDiscovery represents one or more definition(s) of node group auto-discovery
	NodeGroupAutoDiscovery string
	// UnregisteredNodeRemovalTime represents how long CA waits before removing nodes that are not registered in Kubernetes")
	UnregisteredNodeRemovalTime time.Duration
	// EstimatorName is the estimator used to estimate the number of needed nodes in scale up.
	EstimatorName string
	// ExpanderName sets the type of node group expander to be used in scale up
	ExpanderName string
	// MaxGracefulTerminationSec is maximum number of seconds scale down waits for pods to terminante before
	// removing the node from cloud provider.
	MaxGracefulTerminationSec int
	//  Maximum time CA waits for node to be provisioned
	MaxNodeProvisionTime time.Duration
	// MaxTotalUnreadyPercentage is the maximum percentage of unready nodes after which CA halts operations
	MaxTotalUnreadyPercentage float64
	// OkTotalUnreadyCount is the number of allowed unready nodes, irrespective of max-total-unready-percentage
	OkTotalUnreadyCount int
	// CloudConfig is the path to the cloud provider configuration file. Empty string for no configuration file.
	CloudConfig string
	// CloudProviderName sets the type of the cloud provider CA is about to run in. Allowed values: gce, aws
	CloudProviderName string
	// NodeGroups is the list of node groups a.k.a autoscaling targets
	NodeGroups []string
	// VerifyUnschedulable is used to enable verification to ensure that each pod marked by Scheduler as unschedulable actually can't be scheduled on any node.
	// This prevents from adding unnecessary nodes in situation when CA and Scheduler have different configuration.
	VerifyUnschedulablePods bool
	// ScaleDownEnabled is used to allow CA to scale down the cluster
	ScaleDownEnabled bool
	// ScaleDownDelay sets the duration from the last scale up to the time when CA starts to check scale down options
	ScaleDownDelay time.Duration
	// ScaleDownTrialInterval sets how often scale down possibility is check
	ScaleDownTrialInterval time.Duration
	// WriteStatusConfigMap tells if the status information should be written to a ConfigMap
	WriteStatusConfigMap bool
	// BalanceSimilarNodeGroups enables logic that identifies node groups with similar machines and tries to balance node count between them.
	BalanceSimilarNodeGroups bool
	// ConfigNamespace is the namesapce cluster-autoscaler is running in and all related configmaps live in
	ConfigNamespace string
}

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

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

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

type ScaleDownResult int

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