controller

package
v0.0.4 Latest Latest
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 Go to latest Published: Feb 22, 2024 License: Apache-2.0 Imports: 46 Imported by: 0

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Index

Constants

View Source 
const (
	// If a watch drops a delete event for a pod, it'll take this long
	// before a dormant controller waiting for those packets is woken up anyway. It is
	// specifically targeted at the case where some problem prevents an update
	// of expectations, without it the controller could stay asleep forever. This should
	// be set based on the expected latency of watch events.
	//
	// Currently a controller can service (create *and* observe the watch events for said
	// creation) about 10 pods a second, so it takes about 1 min to service
	// 500 pods. Just creation is limited to 20qps, and watching happens with ~10-30s
	// latency/pod at the scale of 3000 pods over 100 nodes.
	ExpectationsTimeout = 5 * time.Minute
	// When batching pod creates, SlowStartInitialBatchSize is the size of the
	// initial batch.  The size of each successive batch is twice the size of
	// the previous batch.  For example, for a value of 1, batch sizes would be
	// 1, 2, 4, 8, ...  and for a value of 10, batch sizes would be
	// 10, 20, 40, 80, ...  Setting the value higher means that quota denials
	// will result in more doomed API calls and associated event spam.  Setting
	// the value lower will result in more API call round trip periods for
	// large batches.
	//
	// Given a number of pods to start "N":
	// The number of doomed calls per sync once quota is exceeded is given by:
	//      min(N,SlowStartInitialBatchSize)
	// The number of batches is given by:
	//      1+floor(log_2(ceil(N/SlowStartInitialBatchSize)))
	SlowStartInitialBatchSize = 1
)
View Source 
const (
	// FailedCreatePodReason is added in an event and in a replica set condition
	// when a pod for a replica set is failed to be created.
	FailedCreatePodReason = "FailedCreate"
	// SuccessfulCreatePodReason is added in an event when a pod for a replica set
	// is successfully created.
	SuccessfulCreatePodReason = "SuccessfulCreate"
	// FailedDeletePodReason is added in an event and in a replica set condition
	// when a pod for a replica set is failed to be deleted.
	FailedDeletePodReason = "FailedDelete"
	// SuccessfulDeletePodReason is added in an event when a pod for a replica set
	// is successfully deleted.
	SuccessfulDeletePodReason = "SuccessfulDelete"
)

Reasons for pod events

Variables

View Source 
var ExpKeyFunc = func(obj interface{}) (string, error) {
	if e, ok := obj.(*ControlleeExpectations); ok {
		return e.key, nil
	}
	return "", fmt.Errorf("could not find key for obj %#v", obj)
}

ExpKeyFunc to parse out the key from a ControlleeExpectation

View Source 
var (
	KeyFunc = cache.DeletionHandlingMetaNamespaceKeyFunc
)
View Source 
var UIDSetKeyFunc = func(obj interface{}) (string, error) {
	if u, ok := obj.(*UIDSet); ok {
		return u.key, nil
	}
	return "", fmt.Errorf("could not find key for obj %#v", obj)
}

UIDSetKeyFunc to parse out the key from a UIDSet.

View Source 
var UpdateLabelBackoff = wait.Backoff{
	Steps:    5,
	Duration: 100 * time.Millisecond,
	Jitter:   1.0,
}
View Source 
var UpdateTaintBackoff = wait.Backoff{
	Steps:    5,
	Duration: 100 * time.Millisecond,
	Jitter:   1.0,
}
View Source 
var ValidatePodName = apimachineryvalidation.NameIsDNSSubdomain

ValidatePodName can be used to check whether the given pod name is valid. Prefix indicates this name will be used as part of generation, in which case trailing dashes are allowed.

Functions

func AddOrUpdateLabelsOnNode 

func AddOrUpdateLabelsOnNode(kubeClient clientset.Interface, nodeName string, labelsToUpdate map[string]string) error

func AddOrUpdateTaintOnNode 

func AddOrUpdateTaintOnNode(ctx context.Context, c clientset.Interface, nodeName string, taints ...*v1.Taint) error

AddOrUpdateTaintOnNode add taints to the node. If taint was added into node, it'll issue API calls to update nodes; otherwise, no API calls. Return error if any.

func CalculateForPodPlacement added in v0.0.2 

func CalculateForPodPlacement(pInfo *PodInfo) (v1.PodSpec, error)

func ComputeHash 

func ComputeHash(template *api.PodTemplateSpec, collisionCount *int32) string

ComputeHash returns a hash value calculated from pod template and a collisionCount to avoid hash collision. The hash will be safe encoded to avoid bad words.

func CountTerminatingPods 

func CountTerminatingPods(pods []*v1.Pod) int32

func FilterActivePods 

func FilterActivePods(logger klog.Logger, pods []*v1.Pod) []*v1.Pod

FilterActivePods returns pods that have not terminated.

func FilterActiveReplicaSets 

func FilterActiveReplicaSets(replicaSets []*apps.ReplicaSet) []*apps.ReplicaSet

FilterActiveReplicaSets returns replica sets that have (or at least ought to have) pods.

func FilterReplicaSets 

func FilterReplicaSets(RSes []*apps.ReplicaSet, filterFn filterRS) []*apps.ReplicaSet

FilterReplicaSets returns replica sets that are filtered by filterFn (all returned ones should match filterFn).

func FilterTerminatingPods 

func FilterTerminatingPods(pods []*v1.Pod) []*v1.Pod

func GenerateDeleteOwnerRefStrategicMergeBytes 

func GenerateDeleteOwnerRefStrategicMergeBytes(dependentUID types.UID, ownerUIDs []types.UID, finalizers ...string) ([]byte, error)

func GetPodFromTemplate 

func GetPodFromTemplate(pInfo PodInfo, parentObject runtime.Object, controllerRef *metav1.OwnerReference) (*v1.Pod, error)

func IsPodActive 

func IsPodActive(p *v1.Pod) bool

func IsPodTerminating 

func IsPodTerminating(p *v1.Pod) bool

func NoResyncPeriodFunc 

func NoResyncPeriodFunc() time.Duration

Returns 0 for resyncPeriod in case resyncing is not needed.

func PatchNodeTaints 

func PatchNodeTaints(ctx context.Context, c clientset.Interface, nodeName string, oldNode *v1.Node, newNode *v1.Node) error

PatchNodeTaints patches node's taints.

func PodKey 

func PodKey(pod *v1.Pod) string

PodKey returns a key unique to the given pod within a cluster. It's used so we consistently use the same key scheme in this module. It does exactly what cache.MetaNamespaceKeyFunc would have done except there's not possibility for error since we know the exact type.

func RecheckDeletionTimestamp 

func RecheckDeletionTimestamp(getObject func(context.Context) (metav1.Object, error)) func(context.Context) error

RecheckDeletionTimestamp returns a CanAdopt() function to recheck deletion.

The CanAdopt() function calls getObject() to fetch the latest value, and denies adoption attempts if that object has a non-nil DeletionTimestamp.

func RemoveTaintOffNode 

func RemoveTaintOffNode(ctx context.Context, c clientset.Interface, nodeName string, node *v1.Node, taints ...*v1.Taint) error

RemoveTaintOffNode is for cleaning up taints temporarily added to node, won't fail if target taint doesn't exist or has been removed. If passed a node it'll check if there's anything to be done, if taint is not present it won't issue any API calls.

func UpsertNodeSelectorRequirements added in v0.0.2 

func UpsertNodeSelectorRequirements(reqList []v1.NodeSelectorRequirement, req v1.NodeSelectorRequirement) []v1.NodeSelectorRequirement

func UpsertPodAffinityTerm added in v0.0.2 

func UpsertPodAffinityTerm(lst []v1.PodAffinityTerm, term v1.PodAffinityTerm) []v1.PodAffinityTerm

func UpsertTopologySpreadConstraint added in v0.0.2 

func UpsertTopologySpreadConstraint(lst []v1.TopologySpreadConstraint, tsc v1.TopologySpreadConstraint) []v1.TopologySpreadConstraint

Types

type ActivePods 

type ActivePods []*v1.Pod

ActivePods type allows custom sorting of pods so a controller can pick the best ones to delete.

func (ActivePods) Len 

func (s ActivePods) Len() int

func (ActivePods) Less 

func (s ActivePods) Less(i, j int) bool

func (ActivePods) Swap 

func (s ActivePods) Swap(i, j int)

type ActivePodsWithRanks 

type ActivePodsWithRanks struct {
	// Pods is a list of pods.
	Pods []*v1.Pod

	// Rank is a ranking of pods.  This ranking is used during sorting when
	// comparing two pods that are both scheduled, in the same phase, and
	// having the same ready status.
	Rank []int

	// Now is a reference timestamp for doing logarithmic timestamp comparisons.
	// If zero, comparison happens without scaling.
	Now metav1.Time
}

ActivePodsWithRanks is a sortable list of pods and a list of corresponding ranks which will be considered during sorting. The two lists must have equal length. After sorting, the pods will be ordered as follows, applying each rule in turn until one matches:

  1. If only one of the pods is assigned to a node, the pod that is not assigned comes before the pod that is.
  2. If the pods' phases differ, a pending pod comes before a pod whose phase is unknown, and a pod whose phase is unknown comes before a running pod.
  3. If exactly one of the pods is ready, the pod that is not ready comes before the ready pod.
  4. If controller.kubernetes.io/pod-deletion-cost annotation is set, then the pod with the lower value will come first.
  5. If the pods' ranks differ, the pod with greater rank comes before the pod with lower rank.
  6. If both pods are ready but have not been ready for the same amount of time, the pod that has been ready for a shorter amount of time comes before the pod that has been ready for longer.
  7. If one pod has a container that has restarted more than any container in the other pod, the pod with the container with more restarts comes before the other pod.
  8. If the pods' creation times differ, the pod that was created more recently comes before the older pod.

In 6 and 8, times are compared in a logarithmic scale. This allows a level of randomness among equivalent Pods when sorting. If two pods have the same logarithmic rank, they are sorted by UUID to provide a pseudorandom order.

If none of these rules matches, the second pod comes before the first pod.

The intention of this ordering is to put pods that should be preferred for deletion first in the list.

func (ActivePodsWithRanks) Len 

func (s ActivePodsWithRanks) Len() int

func (ActivePodsWithRanks) Less 

func (s ActivePodsWithRanks) Less(i, j int) bool

Less compares two pods with corresponding ranks and returns true if the first one should be preferred for deletion.

func (ActivePodsWithRanks) Swap 

func (s ActivePodsWithRanks) Swap(i, j int)

type BaseControllerRefManager 

type BaseControllerRefManager struct {
	Controller metav1.Object
	Selector   labels.Selector

	CanAdoptFunc func(ctx context.Context) error
	// contains filtered or unexported fields
}

func (*BaseControllerRefManager) CanAdopt 

func (m *BaseControllerRefManager) CanAdopt(ctx context.Context) error

func (*BaseControllerRefManager) ClaimObject 

func (m *BaseControllerRefManager) ClaimObject(ctx context.Context, obj metav1.Object, match func(metav1.Object) bool, adopt, release func(context.Context, metav1.Object) error) (bool, error)

ClaimObject tries to take ownership of an object for this controller.

It will reconcile the following:

  • Adopt orphans if the match function returns true.
  • Release owned objects if the match function returns false.

A non-nil error is returned if some form of reconciliation was attempted and failed. Usually, controllers should try again later in case reconciliation is still needed.

If the error is nil, either the reconciliation succeeded, or no reconciliation was necessary. The returned boolean indicates whether you now own the object.

No reconciliation will be attempted if the controller is being deleted.

type ByLogging 

type ByLogging []*v1.Pod

ByLogging allows custom sorting of pods so the best one can be picked for getting its logs.

func (ByLogging) Len 

func (s ByLogging) Len() int

func (ByLogging) Less 

func (s ByLogging) Less(i, j int) bool

func (ByLogging) Swap 

func (s ByLogging) Swap(i, j int)

type ControlleeExpectations 

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

ControlleeExpectations track controllee creates/deletes.

func (*ControlleeExpectations) Add 

func (e *ControlleeExpectations) Add(add, del int64)

Add increments the add and del counters.

func (*ControlleeExpectations) Fulfilled 

func (e *ControlleeExpectations) Fulfilled() bool

Fulfilled returns true if this expectation has been fulfilled.

func (*ControlleeExpectations) GetExpectations 

func (e *ControlleeExpectations) GetExpectations() (int64, int64)

GetExpectations returns the add and del expectations of the controllee.

func (*ControlleeExpectations) MarshalLog 

func (e *ControlleeExpectations) MarshalLog() interface{}

MarshalLog makes a thread-safe copy of the values of the expectations that can be used for logging.

type ControllerExpectations 

type ControllerExpectations struct {
	cache.Store
}

ControllerExpectations is a cache mapping controllers to what they expect to see before being woken up for a sync.

func NewControllerExpectations 

func NewControllerExpectations() *ControllerExpectations

NewControllerExpectations returns a store for ControllerExpectations.

func (*ControllerExpectations) CreationObserved 

func (r *ControllerExpectations) CreationObserved(logger klog.Logger, controllerKey string)

CreationObserved atomically decrements the `add` expectation count of the given controller.

func (*ControllerExpectations) DeleteExpectations 

func (r *ControllerExpectations) DeleteExpectations(logger klog.Logger, controllerKey string)

DeleteExpectations deletes the expectations of the given controller from the TTLStore.

func (*ControllerExpectations) DeletionObserved 

func (r *ControllerExpectations) DeletionObserved(logger klog.Logger, controllerKey string)

DeletionObserved atomically decrements the `del` expectation count of the given controller.

func (*ControllerExpectations) ExpectCreations 

func (r *ControllerExpectations) ExpectCreations(logger klog.Logger, controllerKey string, adds int) error

func (*ControllerExpectations) ExpectDeletions 

func (r *ControllerExpectations) ExpectDeletions(logger klog.Logger, controllerKey string, dels int) error

func (*ControllerExpectations) GetExpectations 

func (r *ControllerExpectations) GetExpectations(controllerKey string) (*ControlleeExpectations, bool, error)

GetExpectations returns the ControlleeExpectations of the given controller.

func (*ControllerExpectations) LowerExpectations 

func (r *ControllerExpectations) LowerExpectations(logger klog.Logger, controllerKey string, add, del int)

Decrements the expectation counts of the given controller.

func (*ControllerExpectations) RaiseExpectations 

func (r *ControllerExpectations) RaiseExpectations(logger klog.Logger, controllerKey string, add, del int)

Increments the expectation counts of the given controller.

func (*ControllerExpectations) SatisfiedExpectations 

func (r *ControllerExpectations) SatisfiedExpectations(logger klog.Logger, controllerKey string) bool

SatisfiedExpectations returns true if the required adds/dels for the given controller have been observed. Add/del counts are established by the controller at sync time, and updated as controllees are observed by the controller manager.

func (*ControllerExpectations) SetExpectations 

func (r *ControllerExpectations) SetExpectations(logger klog.Logger, controllerKey string, add, del int) error

SetExpectations registers new expectations for the given controller. Forgets existing expectations.

type ControllerExpectationsInterface 

type ControllerExpectationsInterface interface {
	GetExpectations(controllerKey string) (*ControlleeExpectations, bool, error)
	SatisfiedExpectations(logger klog.Logger, controllerKey string) bool
	DeleteExpectations(logger klog.Logger, controllerKey string)
	SetExpectations(logger klog.Logger, controllerKey string, add, del int) error
	ExpectCreations(logger klog.Logger, controllerKey string, adds int) error
	ExpectDeletions(logger klog.Logger, controllerKey string, dels int) error
	CreationObserved(logger klog.Logger, controllerKey string)
	DeletionObserved(logger klog.Logger, controllerKey string)
	RaiseExpectations(logger klog.Logger, controllerKey string, add, del int)
	LowerExpectations(logger klog.Logger, controllerKey string, add, del int)
}

ControllerExpectationsInterface is an interface that allows users to set and wait on expectations. Only abstracted out for testing. Warning: if using KeyFunc it is not safe to use a single ControllerExpectationsInterface with different types of controllers, because the keys might conflict across types.

type ControllerRevisionControlInterface 

type ControllerRevisionControlInterface interface {
	PatchControllerRevision(ctx context.Context, namespace, name string, data []byte) error
}

TODO: merge the controller revision interface in controller_history.go with this one ControllerRevisionControlInterface is an interface that knows how to patch ControllerRevisions, as well as increment or decrement them. It is used by the daemonset controller to ease testing of actions that it takes.

type ControllerRevisionControllerRefManager 

type ControllerRevisionControllerRefManager struct {
	BaseControllerRefManager
	// contains filtered or unexported fields
}

ControllerRevisionControllerRefManager is used to manage controllerRef of ControllerRevisions. Three methods are defined on this object 1: Classify 2: AdoptControllerRevision and 3: ReleaseControllerRevision which are used to classify the ControllerRevisions into appropriate categories and accordingly adopt or release them. See comments on these functions for more details.

func NewControllerRevisionControllerRefManager 

func NewControllerRevisionControllerRefManager(
	crControl ControllerRevisionControlInterface,
	controller metav1.Object,
	selector labels.Selector,
	controllerKind schema.GroupVersionKind,
	canAdopt func(ctx context.Context) error,
) *ControllerRevisionControllerRefManager

NewControllerRevisionControllerRefManager returns a ControllerRevisionControllerRefManager that exposes methods to manage the controllerRef of ControllerRevisions.

The canAdopt() function can be used to perform a potentially expensive check (such as a live GET from the API server) prior to the first adoption. It will only be called (at most once) if an adoption is actually attempted. If canAdopt() returns a non-nil error, all adoptions will fail.

NOTE: Once canAdopt() is called, it will not be called again by the same ControllerRevisionControllerRefManager instance. Create a new instance if it makes sense to check canAdopt() again (e.g. in a different sync pass).

func (*ControllerRevisionControllerRefManager) AdoptControllerRevision 

func (m *ControllerRevisionControllerRefManager) AdoptControllerRevision(ctx context.Context, history *apps.ControllerRevision) error

AdoptControllerRevision sends a patch to take control of the ControllerRevision. It returns the error if the patching fails.

func (*ControllerRevisionControllerRefManager) ClaimControllerRevisions 

func (m *ControllerRevisionControllerRefManager) ClaimControllerRevisions(ctx context.Context, histories []*apps.ControllerRevision) ([]*apps.ControllerRevision, error)

ClaimControllerRevisions tries to take ownership of a list of ControllerRevisions.

It will reconcile the following:

  • Adopt orphans if the selector matches.
  • Release owned objects if the selector no longer matches.

A non-nil error is returned if some form of reconciliation was attempted and failed. Usually, controllers should try again later in case reconciliation is still needed.

If the error is nil, either the reconciliation succeeded, or no reconciliation was necessary. The list of ControllerRevisions that you now own is returned.

func (*ControllerRevisionControllerRefManager) ReleaseControllerRevision 

func (m *ControllerRevisionControllerRefManager) ReleaseControllerRevision(ctx context.Context, history *apps.ControllerRevision) error

ReleaseControllerRevision sends a patch to free the ControllerRevision from the control of its controller. It returns the error if the patching fails. 404 and 422 errors are ignored.

type ControllersByCreationTimestamp 

type ControllersByCreationTimestamp []*v1.ReplicationController

ControllersByCreationTimestamp sorts a list of ReplicationControllers by creation timestamp, using their names as a tie breaker.

func (ControllersByCreationTimestamp) Len 

func (o ControllersByCreationTimestamp) Len() int

func (ControllersByCreationTimestamp) Less 

func (o ControllersByCreationTimestamp) Less(i, j int) bool

func (ControllersByCreationTimestamp) Swap 

func (o ControllersByCreationTimestamp) Swap(i, j int)

type FakePodControl 

type FakePodControl struct {
	sync.Mutex
	Templates       []api.PodTemplateSpec
	ControllerRefs  []metav1.OwnerReference
	DeletePodName   []string
	Patches         [][]byte
	Err             error
	CreateLimit     int
	CreateCallCount int
}

func (*FakePodControl) Clear 

func (f *FakePodControl) Clear()

func (*FakePodControl) CreatePods 

func (f *FakePodControl) CreatePods(ctx context.Context, namespace string, pInfo PodInfo, object runtime.Object, controllerRef *metav1.OwnerReference) error

func (*FakePodControl) CreatePodsWithGenerateName 

func (f *FakePodControl) CreatePodsWithGenerateName(ctx context.Context, namespace string, pInfo PodInfo, object runtime.Object, controllerRef *metav1.OwnerReference, generateNamePrefix string) error

func (*FakePodControl) DeletePod 

func (f *FakePodControl) DeletePod(ctx context.Context, namespace string, podID string, object runtime.Object) error

func (*FakePodControl) PatchPod 

func (f *FakePodControl) PatchPod(ctx context.Context, namespace, name string, data []byte) error

type OperatorConfig 

type OperatorConfig struct {
	KubeInformerFactory informers.SharedInformerFactory
	InformerFactory     apiinformers.SharedInformerFactory
	ResyncPeriod        time.Duration
	MaxNumRequeues      int
	NumThreads          int
	ClientConfig        *rest.Config
	KubeClient          kubernetes.Interface
	Client              versioned.Interface
}

func NewOperatorConfig 

func NewOperatorConfig(clientConfig *rest.Config) *OperatorConfig

type PodControlInterface 

type PodControlInterface interface {
	// CreatePods creates new pods according to the spec, and sets object as the pod's controller.
	CreatePods(ctx context.Context, namespace string, pInfo PodInfo, object runtime.Object, controllerRef *metav1.OwnerReference) error
	// CreatePodsWithGenerateName creates new pods according to the spec, sets object as the pod's controller and sets pod's generateName.
	CreatePodsWithGenerateName(ctx context.Context, namespace string, pInfo PodInfo, object runtime.Object, controllerRef *metav1.OwnerReference, generateName string) error
	// DeletePod deletes the pod identified by podID.
	DeletePod(ctx context.Context, namespace string, podID string, object runtime.Object) error
	// PatchPod patches the pod.
	PatchPod(ctx context.Context, namespace, name string, data []byte) error
}

PodControlInterface is an interface that knows how to add or delete pods created as an interface to allow testing.

type PodControllerRefManager 

type PodControllerRefManager struct {
	BaseControllerRefManager
	// contains filtered or unexported fields
}

func NewPodControllerRefManager 

func NewPodControllerRefManager(
	podControl PodControlInterface,
	controller metav1.Object,
	selector labels.Selector,
	controllerKind schema.GroupVersionKind,
	canAdopt func(ctx context.Context) error,
	finalizers ...string,
) *PodControllerRefManager

NewPodControllerRefManager returns a PodControllerRefManager that exposes methods to manage the controllerRef of pods.

The CanAdopt() function can be used to perform a potentially expensive check (such as a live GET from the API server) prior to the first adoption. It will only be called (at most once) if an adoption is actually attempted. If CanAdopt() returns a non-nil error, all adoptions will fail.

NOTE: Once CanAdopt() is called, it will not be called again by the same PodControllerRefManager instance. Create a new instance if it makes sense to check CanAdopt() again (e.g. in a different sync pass).

func (*PodControllerRefManager) AdoptPod 

func (m *PodControllerRefManager) AdoptPod(ctx context.Context, pod *v1.Pod) error

AdoptPod sends a patch to take control of the pod. It returns the error if the patching fails.

func (*PodControllerRefManager) ClaimPods 

func (m *PodControllerRefManager) ClaimPods(ctx context.Context, pods []*v1.Pod, filters ...func(*v1.Pod) bool) ([]*v1.Pod, error)

ClaimPods tries to take ownership of a list of Pods.

It will reconcile the following:

  • Adopt orphans if the selector matches.
  • Release owned objects if the selector no longer matches.

Optional: If one or more filters are specified, a Pod will only be claimed if all filters return true.

A non-nil error is returned if some form of reconciliation was attempted and failed. Usually, controllers should try again later in case reconciliation is still needed.

If the error is nil, either the reconciliation succeeded, or no reconciliation was necessary. The list of Pods that you now own is returned.

func (*PodControllerRefManager) ReleasePod 

func (m *PodControllerRefManager) ReleasePod(ctx context.Context, pod *v1.Pod) error

ReleasePod sends a patch to free the pod from the control of the controller. It returns the error if the patching fails. 404 and 422 errors are ignored.

type PodInfo added in v0.0.2 

type PodInfo struct {
	PetSet          *api.PetSet
	Template        *api.PodTemplateSpec
	PlacementPolicy *api.PlacementPolicy
	PodIndex        int
	PodList         *v1.PodList
	Obj             map[string]interface{}
	Env             *cel.Env
}

func NewPodInfo added in v0.0.2 

func NewPodInfo(set *api.PetSet, template *api.PodTemplateSpec, place *api.PlacementPolicy, podIndex int, podList *v1.PodList) PodInfo

type RSControlInterface 

type RSControlInterface interface {
	PatchReplicaSet(ctx context.Context, namespace, name string, data []byte) error
}

RSControlInterface is an interface that knows how to add or delete ReplicaSets, as well as increment or decrement them. It is used by the deployment controller to ease testing of actions that it takes.

type RealControllerRevisionControl 

type RealControllerRevisionControl struct {
	KubeClient clientset.Interface
}

RealControllerRevisionControl is the default implementation of ControllerRevisionControlInterface.

func (RealControllerRevisionControl) PatchControllerRevision 

func (r RealControllerRevisionControl) PatchControllerRevision(ctx context.Context, namespace, name string, data []byte) error

type RealPodControl 

type RealPodControl struct {
	KubeClient clientset.Interface
	Recorder   record.EventRecorder
}

RealPodControl is the default implementation of PodControlInterface.

func (RealPodControl) CreatePods 

func (r RealPodControl) CreatePods(ctx context.Context, namespace string, pInfo PodInfo, controllerObject runtime.Object, controllerRef *metav1.OwnerReference) error

func (RealPodControl) CreatePodsWithGenerateName 

func (r RealPodControl) CreatePodsWithGenerateName(ctx context.Context, namespace string, pInfo PodInfo, controllerObject runtime.Object, controllerRef *metav1.OwnerReference, generateName string) error

func (RealPodControl) DeletePod 

func (r RealPodControl) DeletePod(ctx context.Context, namespace string, podID string, object runtime.Object) error

func (RealPodControl) PatchPod 

func (r RealPodControl) PatchPod(ctx context.Context, namespace, name string, data []byte) error

type RealRSControl 

type RealRSControl struct {
	KubeClient clientset.Interface
	Recorder   record.EventRecorder
}

RealRSControl is the default implementation of RSControllerInterface.

func (RealRSControl) PatchReplicaSet 

func (r RealRSControl) PatchReplicaSet(ctx context.Context, namespace, name string, data []byte) error

type ReplicaSetControllerRefManager 

type ReplicaSetControllerRefManager struct {
	BaseControllerRefManager
	// contains filtered or unexported fields
}

ReplicaSetControllerRefManager is used to manage controllerRef of ReplicaSets. Three methods are defined on this object 1: Classify 2: AdoptReplicaSet and 3: ReleaseReplicaSet which are used to classify the ReplicaSets into appropriate categories and accordingly adopt or release them. See comments on these functions for more details.

func NewReplicaSetControllerRefManager 

func NewReplicaSetControllerRefManager(
	rsControl RSControlInterface,
	controller metav1.Object,
	selector labels.Selector,
	controllerKind schema.GroupVersionKind,
	canAdopt func(ctx context.Context) error,
) *ReplicaSetControllerRefManager

NewReplicaSetControllerRefManager returns a ReplicaSetControllerRefManager that exposes methods to manage the controllerRef of ReplicaSets.

The CanAdopt() function can be used to perform a potentially expensive check (such as a live GET from the API server) prior to the first adoption. It will only be called (at most once) if an adoption is actually attempted. If CanAdopt() returns a non-nil error, all adoptions will fail.

NOTE: Once CanAdopt() is called, it will not be called again by the same ReplicaSetControllerRefManager instance. Create a new instance if it makes sense to check CanAdopt() again (e.g. in a different sync pass).

func (*ReplicaSetControllerRefManager) AdoptReplicaSet 

func (m *ReplicaSetControllerRefManager) AdoptReplicaSet(ctx context.Context, rs *apps.ReplicaSet) error

AdoptReplicaSet sends a patch to take control of the ReplicaSet. It returns the error if the patching fails.

func (*ReplicaSetControllerRefManager) ClaimReplicaSets 

func (m *ReplicaSetControllerRefManager) ClaimReplicaSets(ctx context.Context, sets []*apps.ReplicaSet) ([]*apps.ReplicaSet, error)

ClaimReplicaSets tries to take ownership of a list of ReplicaSets.

It will reconcile the following:

  • Adopt orphans if the selector matches.
  • Release owned objects if the selector no longer matches.

A non-nil error is returned if some form of reconciliation was attempted and failed. Usually, controllers should try again later in case reconciliation is still needed.

If the error is nil, either the reconciliation succeeded, or no reconciliation was necessary. The list of ReplicaSets that you now own is returned.

func (*ReplicaSetControllerRefManager) ReleaseReplicaSet 

func (m *ReplicaSetControllerRefManager) ReleaseReplicaSet(ctx context.Context, replicaSet *apps.ReplicaSet) error

ReleaseReplicaSet sends a patch to free the ReplicaSet from the control of the Deployment controller. It returns the error if the patching fails. 404 and 422 errors are ignored.

type ReplicaSetsByCreationTimestamp 

type ReplicaSetsByCreationTimestamp []*apps.ReplicaSet

ReplicaSetsByCreationTimestamp sorts a list of ReplicaSet by creation timestamp, using their names as a tie breaker.

func (ReplicaSetsByCreationTimestamp) Len 

func (o ReplicaSetsByCreationTimestamp) Len() int

func (ReplicaSetsByCreationTimestamp) Less 

func (o ReplicaSetsByCreationTimestamp) Less(i, j int) bool

func (ReplicaSetsByCreationTimestamp) Swap 

func (o ReplicaSetsByCreationTimestamp) Swap(i, j int)

type ReplicaSetsBySizeNewer 

type ReplicaSetsBySizeNewer []*apps.ReplicaSet

ReplicaSetsBySizeNewer sorts a list of ReplicaSet by size in descending order, using their creation timestamp or name as a tie breaker. By using the creation timestamp, this sorts from new to old replica sets.

func (ReplicaSetsBySizeNewer) Len 

func (o ReplicaSetsBySizeNewer) Len() int

func (ReplicaSetsBySizeNewer) Less 

func (o ReplicaSetsBySizeNewer) Less(i, j int) bool

func (ReplicaSetsBySizeNewer) Swap 

func (o ReplicaSetsBySizeNewer) Swap(i, j int)

type ReplicaSetsBySizeOlder 

type ReplicaSetsBySizeOlder []*apps.ReplicaSet

ReplicaSetsBySizeOlder sorts a list of ReplicaSet by size in descending order, using their creation timestamp or name as a tie breaker. By using the creation timestamp, this sorts from old to new replica sets.

func (ReplicaSetsBySizeOlder) Len 

func (o ReplicaSetsBySizeOlder) Len() int

func (ReplicaSetsBySizeOlder) Less 

func (o ReplicaSetsBySizeOlder) Less(i, j int) bool

func (ReplicaSetsBySizeOlder) Swap 

func (o ReplicaSetsBySizeOlder) Swap(i, j int)

type ResyncPeriodFunc 

type ResyncPeriodFunc func() time.Duration

func StaticResyncPeriodFunc 

func StaticResyncPeriodFunc(resyncPeriod time.Duration) ResyncPeriodFunc

StaticResyncPeriodFunc returns the resync period specified

type UIDSet 

type UIDSet struct {
	sets.Set[string]
	// contains filtered or unexported fields
}

UIDSet holds a key and a set of UIDs. Used by the UIDTrackingControllerExpectations to remember which UID it has seen/still waiting for.

type UIDTrackingControllerExpectations 

type UIDTrackingControllerExpectations struct {
	ControllerExpectationsInterface
	// contains filtered or unexported fields
}

UIDTrackingControllerExpectations tracks the UID of the pods it deletes. This cache is needed over plain old expectations to safely handle graceful deletion. The desired behavior is to treat an update that sets the DeletionTimestamp on an object as a delete. To do so consistently, one needs to remember the expected deletes so they aren't double counted. TODO: Track creates as well (#22599)

func NewUIDTrackingControllerExpectations 

func NewUIDTrackingControllerExpectations(ce ControllerExpectationsInterface) *UIDTrackingControllerExpectations

NewUIDTrackingControllerExpectations returns a wrapper around ControllerExpectations that is aware of deleteKeys.

func (*UIDTrackingControllerExpectations) DeleteExpectations 

func (u *UIDTrackingControllerExpectations) DeleteExpectations(logger klog.Logger, rcKey string)

DeleteExpectations deletes the UID set and invokes DeleteExpectations on the underlying ControllerExpectationsInterface.

func (*UIDTrackingControllerExpectations) DeletionObserved 

func (u *UIDTrackingControllerExpectations) DeletionObserved(logger klog.Logger, rcKey, deleteKey string)

DeletionObserved records the given deleteKey as a deletion, for the given rc.

func (*UIDTrackingControllerExpectations) ExpectDeletions 

func (u *UIDTrackingControllerExpectations) ExpectDeletions(logger klog.Logger, rcKey string, deletedKeys []string) error

ExpectDeletions records expectations for the given deleteKeys, against the given controller.

func (*UIDTrackingControllerExpectations) GetUIDs 

func (u *UIDTrackingControllerExpectations) GetUIDs(controllerKey string) sets.Set[string]

GetUIDs is a convenience method to avoid exposing the set of expected uids. The returned set is not thread safe, all modifications must be made holding the uidStoreLock.

Source Files

View all Source files

Directories

Path Synopsis
config
config/v1alpha1

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