package core

import "k8s.io/kubernetes/pkg/scheduler/core"

Index ¶

• Constants
• Variables
• func Equal(e1, e2 *HTTPExtender) bool
• func NewHTTPExtender(config *schedulerapi.Extender) (framework.Extender, error)
• type FitError
• func (f *FitError) Error() string
• type HTTPExtender
• func (h *HTTPExtender) Bind(binding *v1.Binding) error
• func (h *HTTPExtender) Filter( pod *v1.Pod, nodes []*v1.Node, ) ([]*v1.Node, extenderv1.FailedNodesMap, error)
• func (h *HTTPExtender) IsBinder() bool
• func (h *HTTPExtender) IsIgnorable() bool
• func (h *HTTPExtender) IsInterested(pod *v1.Pod) bool
• func (h *HTTPExtender) Name() string
• func (h *HTTPExtender) Prioritize(pod *v1.Pod, nodes []*v1.Node) (*extenderv1.HostPriorityList, int64, error)
• func (h *HTTPExtender) ProcessPreemption( pod *v1.Pod, nodeNameToVictims map[string]*extenderv1.Victims, nodeInfos framework.NodeInfoLister, ) (map[string]*extenderv1.Victims, error)
• func (h *HTTPExtender) SupportsPreemption() bool
• type ScheduleAlgorithm
• func NewGenericScheduler( cache internalcache.Cache, podQueue internalqueue.SchedulingQueue, nodeInfoSnapshot *internalcache.Snapshot, extenders []framework.Extender, pvcLister corelisters.PersistentVolumeClaimLister, pdbLister policylisters.PodDisruptionBudgetLister, disablePreemption bool, percentageOfNodesToScore int32) ScheduleAlgorithm
• type ScheduleResult

Constants ¶

const (
	// DefaultExtenderTimeout defines the default extender timeout in second.
	DefaultExtenderTimeout = 5 * time.Second
)

const (
	// NoNodeAvailableMsg is used to format message when no nodes available.
	NoNodeAvailableMsg = "0/%v nodes are available"
)

Variables ¶

var ErrNoNodesAvailable = fmt.Errorf("no nodes available to schedule pods")

ErrNoNodesAvailable is used to describe the error that no nodes available to schedule pods.

Functions ¶

func Equal ¶

func Equal(e1, e2 *HTTPExtender) bool

Equal is used to check if two extenders are equal ignoring the client field, exported for testing

func NewHTTPExtender ¶

func NewHTTPExtender(config *schedulerapi.Extender) (framework.Extender, error)

NewHTTPExtender creates an HTTPExtender object.

Types ¶

type FitError ¶

type FitError struct {
	Pod                   *v1.Pod
	NumAllNodes           int
	FilteredNodesStatuses framework.NodeToStatusMap
}

FitError describes a fit error of a pod.

func (*FitError) Error ¶

func (f *FitError) Error() string

Error returns detailed information of why the pod failed to fit on each node

type HTTPExtender ¶

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

HTTPExtender implements the Extender interface.

func (*HTTPExtender) Bind ¶

func (h *HTTPExtender) Bind(binding *v1.Binding) error

Bind delegates the action of binding a pod to a node to the extender.

func (*HTTPExtender) Filter ¶

func (h *HTTPExtender) Filter(
	pod *v1.Pod,
	nodes []*v1.Node,
) ([]*v1.Node, extenderv1.FailedNodesMap, error)

Filter based on extender implemented predicate functions. The filtered list is expected to be a subset of the supplied list; otherwise the function returns an error. failedNodesMap optionally contains the list of failed nodes and failure reasons.

func (*HTTPExtender) IsBinder ¶

func (h *HTTPExtender) IsBinder() bool

IsBinder returns whether this extender is configured for the Bind method.

func (*HTTPExtender) IsIgnorable ¶

func (h *HTTPExtender) IsIgnorable() bool

IsIgnorable returns true indicates scheduling should not fail when this extender is unavailable

func (*HTTPExtender) IsInterested ¶

func (h *HTTPExtender) IsInterested(pod *v1.Pod) bool

IsInterested returns true if at least one extended resource requested by this pod is managed by this extender.

func (*HTTPExtender) Name ¶

func (h *HTTPExtender) Name() string

Name returns extenderURL to identify the extender.

func (*HTTPExtender) Prioritize ¶

func (h *HTTPExtender) Prioritize(pod *v1.Pod, nodes []*v1.Node) (*extenderv1.HostPriorityList, int64, error)

Prioritize based on extender implemented priority functions. Weight*priority is added up for each such priority function. The returned score is added to the score computed by Kubernetes scheduler. The total score is used to do the host selection.

func (*HTTPExtender) ProcessPreemption ¶

func (h *HTTPExtender) ProcessPreemption(
	pod *v1.Pod,
	nodeNameToVictims map[string]*extenderv1.Victims,
	nodeInfos framework.NodeInfoLister,
) (map[string]*extenderv1.Victims, error)

ProcessPreemption returns filtered candidate nodes and victims after running preemption logic in extender.

func (*HTTPExtender) SupportsPreemption ¶

func (h *HTTPExtender) SupportsPreemption() bool

SupportsPreemption returns true if an extender supports preemption. An extender should have preempt verb defined and enabled its own node cache.

type ScheduleAlgorithm ¶

type ScheduleAlgorithm interface {
	Schedule(context.Context, *profile.Profile, *framework.CycleState, *v1.Pod) (scheduleResult ScheduleResult, err error)
	// Preempt receives scheduling errors for a pod and tries to create room for
	// the pod by preempting lower priority pods if possible.
	// It returns the node where preemption happened, a list of preempted pods, a
	// list of pods whose nominated node name should be removed, and error if any.
	Preempt(context.Context, *profile.Profile, *framework.CycleState, *v1.Pod, error) (selectedNode string, preemptedPods []*v1.Pod, cleanupNominatedPods []*v1.Pod, err error)
	// Extenders returns a slice of extender config. This is exposed for
	// testing.
	Extenders() []framework.Extender
}

ScheduleAlgorithm is an interface implemented by things that know how to schedule pods onto machines. TODO: Rename this type.

func NewGenericScheduler ¶

func NewGenericScheduler(
	cache internalcache.Cache,
	podQueue internalqueue.SchedulingQueue,
	nodeInfoSnapshot *internalcache.Snapshot,
	extenders []framework.Extender,
	pvcLister corelisters.PersistentVolumeClaimLister,
	pdbLister policylisters.PodDisruptionBudgetLister,
	disablePreemption bool,
	percentageOfNodesToScore int32) ScheduleAlgorithm

NewGenericScheduler creates a genericScheduler object.

type ScheduleResult ¶

type ScheduleResult struct {
	// Name of the scheduler suggest host
	SuggestedHost string
	// Number of nodes scheduler evaluated on one pod scheduled
	EvaluatedNodes int
	// Number of feasible nodes on one pod scheduled
	FeasibleNodes int
}

ScheduleResult represents the result of one pod scheduled. It will contain the final selected Node, along with the selected intermediate information.

Source Files ¶

extender.go generic_scheduler.go