lifecycle

package
Version: v1.24.0 Latest Latest
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Published: May 3, 2022 License: Apache-2.0 Imports: 19 Imported by: 84

Documentation

Overview

Package lifecycle contains handlers for pod lifecycle events and interfaces to integrate with kubelet admission, synchronization, and eviction of pods.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewHandlerRunner

func NewHandlerRunner(httpGetter kubetypes.HTTPGetter, commandRunner kubecontainer.CommandRunner, containerManager podStatusProvider) kubecontainer.HandlerRunner

NewHandlerRunner returns a configured lifecycle handler for a container.

Types

type AdmissionFailureHandler added in v1.6.0

type AdmissionFailureHandler interface {
	HandleAdmissionFailure(admitPod *v1.Pod, failureReasons []PredicateFailureReason) ([]PredicateFailureReason, error)
}

AdmissionFailureHandler is an interface which defines how to deal with a failure to admit a pod. This allows for the graceful handling of pod admission failure.

type AdmissionFailureHandlerStub added in v1.6.0

type AdmissionFailureHandlerStub struct{}

AdmissionFailureHandlerStub is an AdmissionFailureHandler that does not perform any handling of admission failure. It simply passes the failure on.

func NewAdmissionFailureHandlerStub added in v1.6.0

func NewAdmissionFailureHandlerStub() *AdmissionFailureHandlerStub

NewAdmissionFailureHandlerStub returns an instance of AdmissionFailureHandlerStub.

func (*AdmissionFailureHandlerStub) HandleAdmissionFailure added in v1.6.0

func (n *AdmissionFailureHandlerStub) HandleAdmissionFailure(admitPod *v1.Pod, failureReasons []PredicateFailureReason) ([]PredicateFailureReason, error)

HandleAdmissionFailure simply passes admission rejection on, with no special handling.

type InsufficientResourceError added in v1.18.0

type InsufficientResourceError struct {
	ResourceName v1.ResourceName
	Requested    int64
	Used         int64
	Capacity     int64
}

InsufficientResourceError is an error type that indicates what kind of resource limit is hit and caused the unfitting failure.

func (*InsufficientResourceError) Error added in v1.18.0

func (e *InsufficientResourceError) Error() string

func (*InsufficientResourceError) GetInsufficientAmount added in v1.18.0

func (e *InsufficientResourceError) GetInsufficientAmount() int64

GetInsufficientAmount returns the amount of the insufficient resource of the error.

func (*InsufficientResourceError) GetReason added in v1.18.0

func (e *InsufficientResourceError) GetReason() string

GetReason returns the reason of the InsufficientResourceError.

type PodAdmitAttributes added in v1.3.0

type PodAdmitAttributes struct {
	// the pod to evaluate for admission
	Pod *v1.Pod
	// all pods bound to the kubelet excluding the pod being evaluated
	OtherPods []*v1.Pod
}

PodAdmitAttributes is the context for a pod admission decision. The member fields of this struct should never be mutated.

type PodAdmitHandler added in v1.3.0

type PodAdmitHandler interface {
	// Admit evaluates if a pod can be admitted.
	Admit(attrs *PodAdmitAttributes) PodAdmitResult
}

PodAdmitHandler is notified during pod admission.

func NewAppArmorAdmitHandler added in v1.4.0

func NewAppArmorAdmitHandler(validator apparmor.Validator) PodAdmitHandler

NewAppArmorAdmitHandler returns a PodAdmitHandler which is used to evaluate if a pod can be admitted from the perspective of AppArmor.

func NewPredicateAdmitHandler added in v1.5.0

func NewPredicateAdmitHandler(getNodeAnyWayFunc getNodeAnyWayFuncType, admissionFailureHandler AdmissionFailureHandler, pluginResourceUpdateFunc pluginResourceUpdateFuncType) PodAdmitHandler

NewPredicateAdmitHandler returns a PodAdmitHandler which is used to evaluates if a pod can be admitted from the perspective of predicates.

type PodAdmitHandlers added in v1.3.0

type PodAdmitHandlers []PodAdmitHandler

PodAdmitHandlers maintains a list of handlers to pod admission.

func (*PodAdmitHandlers) AddPodAdmitHandler added in v1.3.0

func (handlers *PodAdmitHandlers) AddPodAdmitHandler(a PodAdmitHandler)

AddPodAdmitHandler adds the specified observer.

type PodAdmitResult added in v1.3.0

type PodAdmitResult struct {
	// if true, the pod should be admitted.
	Admit bool
	// a brief single-word reason why the pod could not be admitted.
	Reason string
	// a brief message explaining why the pod could not be admitted.
	Message string
}

PodAdmitResult provides the result of a pod admission decision.

type PodAdmitTarget added in v1.3.0

type PodAdmitTarget interface {
	// AddPodAdmitHandler adds the specified handler.
	AddPodAdmitHandler(a PodAdmitHandler)
}

PodAdmitTarget maintains a list of handlers to invoke.

type PodLifecycleTarget added in v1.3.0

type PodLifecycleTarget interface {
	PodAdmitTarget
	PodSyncLoopTarget
	PodSyncTarget
}

PodLifecycleTarget groups a set of lifecycle interfaces for convenience.

type PodSyncHandler added in v1.3.0

type PodSyncHandler interface {
	// ShouldEvict is invoked during each sync pod operation to determine
	// if the pod should be evicted from the kubelet.  If so, the pod status
	// is updated to mark its phase as failed with the provided reason and message,
	// and the pod is immediately killed.
	// This operation must return immediately as its called for each sync pod.
	// The provided pod should never be modified.
	ShouldEvict(pod *v1.Pod) ShouldEvictResponse
}

PodSyncHandler is invoked during each sync pod operation.

type PodSyncHandlers added in v1.3.0

type PodSyncHandlers []PodSyncHandler

PodSyncHandlers maintains a list of handlers to pod sync.

func (*PodSyncHandlers) AddPodSyncHandler added in v1.3.0

func (handlers *PodSyncHandlers) AddPodSyncHandler(a PodSyncHandler)

AddPodSyncHandler adds the specified handler.

type PodSyncLoopHandler added in v1.3.0

type PodSyncLoopHandler interface {
	// ShouldSync returns true if the pod needs to be synced.
	// This operation must return immediately as its called for each pod.
	// The provided pod should never be modified.
	ShouldSync(pod *v1.Pod) bool
}

PodSyncLoopHandler is invoked during each sync loop iteration.

type PodSyncLoopHandlers added in v1.3.0

type PodSyncLoopHandlers []PodSyncLoopHandler

PodSyncLoopHandlers maintains a list of handlers to pod sync loop.

func (*PodSyncLoopHandlers) AddPodSyncLoopHandler added in v1.3.0

func (handlers *PodSyncLoopHandlers) AddPodSyncLoopHandler(a PodSyncLoopHandler)

AddPodSyncLoopHandler adds the specified observer.

type PodSyncLoopTarget added in v1.3.0

type PodSyncLoopTarget interface {
	// AddPodSyncLoopHandler adds the specified handler.
	AddPodSyncLoopHandler(a PodSyncLoopHandler)
}

PodSyncLoopTarget maintains a list of handlers to pod sync loop.

type PodSyncTarget added in v1.3.0

type PodSyncTarget interface {
	// AddPodSyncHandler adds the specified handler
	AddPodSyncHandler(a PodSyncHandler)
}

PodSyncTarget maintains a list of handlers to pod sync.

type PredicateFailureError added in v1.18.0

type PredicateFailureError struct {
	PredicateName string
	PredicateDesc string
}

PredicateFailureError describes a failure error of predicate.

func (*PredicateFailureError) Error added in v1.18.0

func (e *PredicateFailureError) Error() string

func (*PredicateFailureError) GetReason added in v1.18.0

func (e *PredicateFailureError) GetReason() string

GetReason returns the reason of the PredicateFailureError.

type PredicateFailureReason added in v1.18.0

type PredicateFailureReason interface {
	GetReason() string
}

PredicateFailureReason interface represents the failure reason of a predicate.

type ShouldEvictResponse added in v1.3.0

type ShouldEvictResponse struct {
	// if true, the pod should be evicted.
	Evict bool
	// a brief CamelCase reason why the pod should be evicted.
	Reason string
	// a brief message why the pod should be evicted.
	Message string
}

ShouldEvictResponse provides the result of a should evict request.

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