package lifecycle

import "k8s.io/kubernetes/pkg/kubelet/lifecycle"

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

Index ¶

• func NewHandlerRunner(httpGetter kubetypes.HTTPGetter, commandRunner kubecontainer.CommandRunner, containerManager podStatusProvider) kubecontainer.HandlerRunner
• type AdmissionFailureHandler
• type AdmissionFailureHandlerStub
• func NewAdmissionFailureHandlerStub() *AdmissionFailureHandlerStub
• func (n *AdmissionFailureHandlerStub) HandleAdmissionFailure(admitPod *v1.Pod, failureReasons []PredicateFailureReason) ([]PredicateFailureReason, error)
• type InsufficientResourceError
• func (e *InsufficientResourceError) Error() string
• func (e *InsufficientResourceError) GetInsufficientAmount() int64
• func (e *InsufficientResourceError) GetReason() string
• type PodAdmitAttributes
• type PodAdmitHandler
• func NewAppArmorAdmitHandler(validator apparmor.Validator) PodAdmitHandler
• func NewNoNewPrivsAdmitHandler(runtime kubecontainer.Runtime) PodAdmitHandler
• func NewPredicateAdmitHandler(getNodeAnyWayFunc getNodeAnyWayFuncType, admissionFailureHandler AdmissionFailureHandler, pluginResourceUpdateFunc pluginResourceUpdateFuncType) PodAdmitHandler
• func NewProcMountAdmitHandler(runtime kubecontainer.Runtime) PodAdmitHandler
• type PodAdmitHandlers
• func (handlers *PodAdmitHandlers) AddPodAdmitHandler(a PodAdmitHandler)
• type PodAdmitResult
• type PodAdmitTarget
• type PodLifecycleTarget
• type PodSyncHandler
• type PodSyncHandlers
• func (handlers *PodSyncHandlers) AddPodSyncHandler(a PodSyncHandler)
• type PodSyncLoopHandler
• type PodSyncLoopHandlers
• func (handlers *PodSyncLoopHandlers) AddPodSyncLoopHandler(a PodSyncLoopHandler)
• type PodSyncLoopTarget
• type PodSyncTarget
• type PredicateFailureError
• func (e *PredicateFailureError) Error() string
• func (e *PredicateFailureError) GetReason() string
• type PredicateFailureReason
• func GeneralPredicates(pod *v1.Pod, nodeInfo *schedulerframework.NodeInfo) ([]PredicateFailureReason, error)
• type ShouldEvictResponse

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 ¶

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 ¶

type AdmissionFailureHandlerStub struct{}

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

func NewAdmissionFailureHandlerStub ¶

func NewAdmissionFailureHandlerStub() *AdmissionFailureHandlerStub

NewAdmissionFailureHandlerStub returns an instance of AdmissionFailureHandlerStub.

func (*AdmissionFailureHandlerStub) HandleAdmissionFailure ¶

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

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

type InsufficientResourceError ¶

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 ¶

func (e *InsufficientResourceError) Error() string

func (*InsufficientResourceError) GetInsufficientAmount ¶

func (e *InsufficientResourceError) GetInsufficientAmount() int64

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

func (*InsufficientResourceError) GetReason ¶

func (e *InsufficientResourceError) GetReason() string

GetReason returns the reason of the InsufficientResourceError.

type PodAdmitAttributes ¶

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 ¶

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

PodAdmitHandler is notified during pod admission.

func NewAppArmorAdmitHandler ¶

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 NewNoNewPrivsAdmitHandler ¶

func NewNoNewPrivsAdmitHandler(runtime kubecontainer.Runtime) PodAdmitHandler

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

func NewPredicateAdmitHandler ¶

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.

func NewProcMountAdmitHandler ¶

func NewProcMountAdmitHandler(runtime kubecontainer.Runtime) PodAdmitHandler

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

type PodAdmitHandlers ¶

type PodAdmitHandlers []PodAdmitHandler

PodAdmitHandlers maintains a list of handlers to pod admission.

func (*PodAdmitHandlers) AddPodAdmitHandler ¶

func (handlers *PodAdmitHandlers) AddPodAdmitHandler(a PodAdmitHandler)

AddPodAdmitHandler adds the specified observer.

type PodAdmitResult ¶

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 ¶

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

PodAdmitTarget maintains a list of handlers to invoke.

type PodLifecycleTarget ¶

type PodLifecycleTarget interface {
	PodAdmitTarget
	PodSyncLoopTarget
	PodSyncTarget
}

PodLifecycleTarget groups a set of lifecycle interfaces for convenience.

type PodSyncHandler ¶

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 ¶

type PodSyncHandlers []PodSyncHandler

PodSyncHandlers maintains a list of handlers to pod sync.

func (*PodSyncHandlers) AddPodSyncHandler ¶

func (handlers *PodSyncHandlers) AddPodSyncHandler(a PodSyncHandler)

AddPodSyncHandler adds the specified handler.

type PodSyncLoopHandler ¶

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 ¶

type PodSyncLoopHandlers []PodSyncLoopHandler

PodSyncLoopHandlers maintains a list of handlers to pod sync loop.

func (*PodSyncLoopHandlers) AddPodSyncLoopHandler ¶

func (handlers *PodSyncLoopHandlers) AddPodSyncLoopHandler(a PodSyncLoopHandler)

AddPodSyncLoopHandler adds the specified observer.

type PodSyncLoopTarget ¶

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

PodSyncLoopTarget maintains a list of handlers to pod sync loop.

type PodSyncTarget ¶

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

PodSyncTarget maintains a list of handlers to pod sync.

type PredicateFailureError ¶

type PredicateFailureError struct {
	PredicateName string
	PredicateDesc string
}

PredicateFailureError describes a failure error of predicate.

func (*PredicateFailureError) Error ¶

func (e *PredicateFailureError) Error() string

func (*PredicateFailureError) GetReason ¶

func (e *PredicateFailureError) GetReason() string

GetReason returns the reason of the PredicateFailureError.

type PredicateFailureReason ¶

type PredicateFailureReason interface {
	GetReason() string
}

PredicateFailureReason interface represents the failure reason of a predicate.

func GeneralPredicates ¶

func GeneralPredicates(pod *v1.Pod, nodeInfo *schedulerframework.NodeInfo) ([]PredicateFailureReason, error)

GeneralPredicates checks a group of predicates that the kubelet cares about.

type ShouldEvictResponse ¶

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.

Source Files ¶

admission_failure_handler_stub.go doc.go handlers.go interfaces.go predicate.go