Documentation
¶
Index ¶
- Constants
- Variables
- func Equal(e1, e2 *HTTPExtender) bool
- func NewHTTPExtender(config *schedulerapi.Extender) (framework.Extender, error)
- func PodPassesFiltersOnNode(ctx context.Context, ph framework.PreemptHandle, state *framework.CycleState, ...) (bool, *framework.Status, error)
- type FitError
- 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, ...) (map[string]*extenderv1.Victims, error)
- func (h *HTTPExtender) SupportsPreemption() bool
- type 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 ¶ added in v1.17.0
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.
func PodPassesFiltersOnNode ¶ added in v1.19.0
func PodPassesFiltersOnNode( ctx context.Context, ph framework.PreemptHandle, state *framework.CycleState, pod *v1.Pod, info *framework.NodeInfo, ) (bool, *framework.Status, error)
PodPassesFiltersOnNode checks whether a node given by NodeInfo satisfies the filter plugins. This function is called from two different places: Schedule and Preempt. When it is called from Schedule, we want to test whether the pod is schedulable on the node with all the existing pods on the node plus higher and equal priority pods nominated to run on the node. When it is called from Preempt, we should remove the victims of preemption and add the nominated pods. Removal of the victims is done by SelectVictimsOnNode(). Preempt removes victims from PreFilter state and NodeInfo before calling this function. TODO: move this out so that plugins don't need to depend on <core> pkg.
Types ¶
type FitError ¶
type FitError struct { Pod *v1.Pod NumAllNodes int FilteredNodesStatuses framework.NodeToStatusMap }
FitError describes a fit error of a pod.
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 ¶ added in v1.11.0
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 ¶ added in v1.13.0
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 ¶ added in v1.11.0
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 ¶ added in v1.11.0
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 ¶ added in v1.14.0
type ScheduleAlgorithm interface { Schedule(context.Context, framework.Framework, *framework.CycleState, *v1.Pod) (scheduleResult ScheduleResult, 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, nodeInfoSnapshot *internalcache.Snapshot, extenders []framework.Extender, percentageOfNodesToScore int32) ScheduleAlgorithm
NewGenericScheduler creates a genericScheduler object.
type ScheduleResult ¶ added in v1.14.0
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.