algorithm

Documentation

Overview

Package scheduler contains a generic Scheduler interface and several implementations.

Index

• type ControllerLister
• type EmptyControllerLister
  • func (f EmptyControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error)
  • func (f EmptyControllerLister) List() ([]api.ReplicationController, error)
• type FakeControllerLister
  • func (f FakeControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error)
  • func (f FakeControllerLister) List() ([]api.ReplicationController, error)
• type FakeNodeLister
  • func (f FakeNodeLister) List() (api.NodeList, error)
• type FakePodLister
  • func (f FakePodLister) List(s labels.Selector) (selected []*api.Pod, err error)
• type FakeServiceLister
  • func (f FakeServiceLister) GetPodServices(pod *api.Pod) (services []api.Service, err error)
  • func (f FakeServiceLister) List() (api.ServiceList, error)
• type FitPredicate
• type NodeLister
• type PodLister
• type PriorityConfig
• type PriorityFunction
• type ScheduleAlgorithm
• type SchedulerExtender
• type ServiceLister

Types

type ControllerLister

type ControllerLister interface {
	// Lists all the replication controllers
	List() ([]api.ReplicationController, error)
	// Gets the services for the given pod
	GetPodControllers(*api.Pod) ([]api.ReplicationController, error)
}

ControllerLister interface represents anything that can produce a list of ReplicationController; the list is consumed by a scheduler.

type EmptyControllerLister

type EmptyControllerLister struct{}

EmptyControllerLister implements ControllerLister on []api.ReplicationController returning empty data

func (EmptyControllerLister) GetPodControllers

func (f EmptyControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error)

GetPodControllers returns nil

func (EmptyControllerLister) List

func (f EmptyControllerLister) List() ([]api.ReplicationController, error)

List returns nil

type FakeControllerLister

type FakeControllerLister []api.ReplicationController

FakeControllerLister implements ControllerLister on []api.ReplicationController for test purposes.

func (FakeControllerLister) GetPodControllers

func (f FakeControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error)

GetPodControllers gets the ReplicationControllers that have the selector that match the labels on the given pod

func (FakeControllerLister) List

func (f FakeControllerLister) List() ([]api.ReplicationController, error)

List returns []api.ReplicationController, the list of all ReplicationControllers.

type FakeNodeLister

type FakeNodeLister api.NodeList

FakeNodeLister implements NodeLister on a []string for test purposes.

func (FakeNodeLister) List

func (f FakeNodeLister) List() (api.NodeList, error)

List returns nodes as a []string.

type FakePodLister

type FakePodLister []*api.Pod

FakePodLister implements PodLister on an []api.Pods for test purposes.

func (FakePodLister) List

func (f FakePodLister) List(s labels.Selector) (selected []*api.Pod, err error)

List returns []*api.Pod matching a query.

type FakeServiceLister

type FakeServiceLister []api.Service

FakeServiceLister implements ServiceLister on []api.Service for test purposes.

func (FakeServiceLister) GetPodServices

func (f FakeServiceLister) GetPodServices(pod *api.Pod) (services []api.Service, err error)

GetPodServices gets the services that have the selector that match the labels on the given pod

func (FakeServiceLister) List

func (f FakeServiceLister) List() (api.ServiceList, error)

List returns api.ServiceList, the list of all services.

type FitPredicate

type FitPredicate func(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)

FitPredicate is a function that indicates if a pod fits into an existing node.

type NodeLister

type NodeLister interface {
	List() (list api.NodeList, err error)
}

NodeLister interface represents anything that can list nodes for a scheduler.

type PodLister

type PodLister interface {
	// TODO: make this exactly the same as client's Pods(ns).List() method, by returning a api.PodList
	List(labels.Selector) ([]*api.Pod, error)
}

PodLister interface represents anything that can list pods for a scheduler.

type PriorityConfig

type PriorityConfig struct {
	Function PriorityFunction
	Weight   int
}

type PriorityFunction

type PriorityFunction func(pod *api.Pod, machineToPods map[string][]*api.Pod, podLister PodLister, nodeLister NodeLister) (schedulerapi.HostPriorityList, error)

type ScheduleAlgorithm

type ScheduleAlgorithm interface {
	Schedule(*api.Pod, NodeLister) (selectedMachine string, err error)
}

ScheduleAlgorithm is an interface implemented by things that know how to schedule pods onto machines.

type SchedulerExtender

type SchedulerExtender interface {
	// Filter based on extender-implemented predicate functions. The filtered list is
	// expected to be a subset of the supplied list.
	Filter(pod *api.Pod, nodes *api.NodeList) (filteredNodes *api.NodeList, err error)

	// Prioritize based on extender-implemented priority functions. The returned scores & weight
	// are used to compute the weighted score for an extender. The weighted scores are added to
	// the scores computed  by Kubernetes scheduler. The total scores are used to do the host selection.
	Prioritize(pod *api.Pod, nodes *api.NodeList) (hostPriorities *schedulerapi.HostPriorityList, weight int, err error)
}

SchedulerExtender is an interface for external processes to influence scheduling decisions made by Kubernetes. This is typically needed for resources not directly managed by Kubernetes.

type ServiceLister

type ServiceLister interface {
	// Lists all the services
	List() (api.ServiceList, error)
	// Gets the services for the given pod
	GetPodServices(*api.Pod) ([]api.Service, error)
}

ServiceLister interface represents anything that can produce a list of services; the list is consumed by a scheduler.