lifecycle

Documentation

Overview

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

Index

• func NewHandlerRunner(httpGetter kubetypes.HttpGetter, ...) kubecontainer.HandlerRunner
• func NewPredicateAdmitHandler(getNodeAnyWayFunc getNodeAnyWayFuncType, ...) *predicateAdmitHandler
• type AdmissionFailureHandler
• type AdmissionFailureHandlerStub
  • func NewAdmissionFailureHandlerStub() *AdmissionFailureHandlerStub
  • func (n *AdmissionFailureHandlerStub) HandleAdmissionFailure(admitPod *v1.Pod, failureReasons []algorithm.PredicateFailureReason) (bool, []algorithm.PredicateFailureReason, error)
• type HandlerRunner
  • func (hr *HandlerRunner) Run(containerID kubecontainer.ContainerID, pod *v1.Pod, container *v1.Container, ...) (string, error)
• type PodAdmitAttributes
• type PodAdmitHandler
  • func NewAppArmorAdmitHandler(validator apparmor.Validator) PodAdmitHandler
  • func NewNoNewPrivsAdmitHandler(runtime kubecontainer.Runtime) 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 ShouldEvictResponse

Functions

func NewHandlerRunner

func NewHandlerRunner(httpGetter kubetypes.HttpGetter, commandRunner kubecontainer.ContainerCommandRunner, containerManager podStatusProvider) kubecontainer.HandlerRunner

func NewPredicateAdmitHandler

func NewPredicateAdmitHandler(getNodeAnyWayFunc getNodeAnyWayFuncType, admissionFailureHandler AdmissionFailureHandler) *predicateAdmitHandler

Types

type AdmissionFailureHandler

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

func (*AdmissionFailureHandlerStub) HandleAdmissionFailure

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

type HandlerRunner

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

func (*HandlerRunner) Run

func (hr *HandlerRunner) Run(containerID kubecontainer.ContainerID, pod *v1.Pod, container *v1.Container, handler *v1.Handler) (string, error)

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

func NewNoNewPrivsAdmitHandler

func NewNoNewPrivsAdmitHandler(runtime kubecontainer.Runtime) PodAdmitHandler

func NewProcMountAdmitHandler

func NewProcMountAdmitHandler(runtime kubecontainer.Runtime) PodAdmitHandler

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 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.