rebase: update kubernetes and libraries to v1.22.0 version

Kubernetes v1.22 version has been released and this update
ceph csi dependencies to use the same version.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/k8s.io/client-go/tools/events/OWNERS

@@ -0,0 +1,10 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+approvers:
+- sig-instrumentation-approvers
+- yastij
+- wojtek-t
+reviewers:
+- sig-instrumentation-reviewers
+- yastij
+- wojtek-t

vendor/k8s.io/client-go/tools/events/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package events has all client logic for recording and reporting
+// "k8s.io/api/events/v1beta1".Event events.
+package events // import "k8s.io/client-go/tools/events"

vendor/k8s.io/client-go/tools/events/event_broadcaster.go

@@ -0,0 +1,384 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package events
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"sync"
+	"time"
+
+	corev1 "k8s.io/api/core/v1"
+	eventsv1 "k8s.io/api/events/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/clock"
+	"k8s.io/apimachinery/pkg/util/json"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/apimachinery/pkg/util/strategicpatch"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/apimachinery/pkg/watch"
+	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/kubernetes/scheme"
+	typedv1core "k8s.io/client-go/kubernetes/typed/core/v1"
+	typedeventsv1 "k8s.io/client-go/kubernetes/typed/events/v1"
+	restclient "k8s.io/client-go/rest"
+	"k8s.io/client-go/tools/record"
+	"k8s.io/client-go/tools/record/util"
+	"k8s.io/klog/v2"
+)
+
+const (
+	maxTriesPerEvent = 12
+	finishTime       = 6 * time.Minute
+	refreshTime      = 30 * time.Minute
+	maxQueuedEvents  = 1000
+)
+
+var defaultSleepDuration = 10 * time.Second
+
+// TODO: validate impact of copying and investigate hashing
+type eventKey struct {
+	action              string
+	reason              string
+	reportingController string
+	regarding           corev1.ObjectReference
+	related             corev1.ObjectReference
+}
+
+type eventBroadcasterImpl struct {
+	*watch.Broadcaster
+	mu            sync.Mutex
+	eventCache    map[eventKey]*eventsv1.Event
+	sleepDuration time.Duration
+	sink          EventSink
+}
+
+// EventSinkImpl wraps EventsV1Interface to implement EventSink.
+// TODO: this makes it easier for testing purpose and masks the logic of performing API calls.
+// Note that rollbacking to raw clientset should also be transparent.
+type EventSinkImpl struct {
+	Interface typedeventsv1.EventsV1Interface
+}
+
+// Create takes the representation of a event and creates it. Returns the server's representation of the event, and an error, if there is any.
+func (e *EventSinkImpl) Create(event *eventsv1.Event) (*eventsv1.Event, error) {
+	if event.Namespace == "" {
+		return nil, fmt.Errorf("can't create an event with empty namespace")
+	}
+	return e.Interface.Events(event.Namespace).Create(context.TODO(), event, metav1.CreateOptions{})
+}
+
+// Update takes the representation of a event and updates it. Returns the server's representation of the event, and an error, if there is any.
+func (e *EventSinkImpl) Update(event *eventsv1.Event) (*eventsv1.Event, error) {
+	if event.Namespace == "" {
+		return nil, fmt.Errorf("can't update an event with empty namespace")
+	}
+	return e.Interface.Events(event.Namespace).Update(context.TODO(), event, metav1.UpdateOptions{})
+}
+
+// Patch applies the patch and returns the patched event, and an error, if there is any.
+func (e *EventSinkImpl) Patch(event *eventsv1.Event, data []byte) (*eventsv1.Event, error) {
+	if event.Namespace == "" {
+		return nil, fmt.Errorf("can't patch an event with empty namespace")
+	}
+	return e.Interface.Events(event.Namespace).Patch(context.TODO(), event.Name, types.StrategicMergePatchType, data, metav1.PatchOptions{})
+}
+
+// NewBroadcaster Creates a new event broadcaster.
+func NewBroadcaster(sink EventSink) EventBroadcaster {
+	return newBroadcaster(sink, defaultSleepDuration, map[eventKey]*eventsv1.Event{})
+}
+
+// NewBroadcasterForTest Creates a new event broadcaster for test purposes.
+func newBroadcaster(sink EventSink, sleepDuration time.Duration, eventCache map[eventKey]*eventsv1.Event) EventBroadcaster {
+	return &eventBroadcasterImpl{
+		Broadcaster:   watch.NewBroadcaster(maxQueuedEvents, watch.DropIfChannelFull),
+		eventCache:    eventCache,
+		sleepDuration: sleepDuration,
+		sink:          sink,
+	}
+}
+
+func (e *eventBroadcasterImpl) Shutdown() {
+	e.Broadcaster.Shutdown()
+}
+
+// refreshExistingEventSeries refresh events TTL
+func (e *eventBroadcasterImpl) refreshExistingEventSeries() {
+	// TODO: Investigate whether lock contention won't be a problem
+	e.mu.Lock()
+	defer e.mu.Unlock()
+	for isomorphicKey, event := range e.eventCache {
+		if event.Series != nil {
+			if recordedEvent, retry := recordEvent(e.sink, event); !retry {
+				if recordedEvent != nil {
+					e.eventCache[isomorphicKey] = recordedEvent
+				}
+			}
+		}
+	}
+}
+
+// finishSeries checks if a series has ended and either:
+// - write final count to the apiserver
+// - delete a singleton event (i.e. series field is nil) from the cache
+func (e *eventBroadcasterImpl) finishSeries() {
+	// TODO: Investigate whether lock contention won't be a problem
+	e.mu.Lock()
+	defer e.mu.Unlock()
+	for isomorphicKey, event := range e.eventCache {
+		eventSerie := event.Series
+		if eventSerie != nil {
+			if eventSerie.LastObservedTime.Time.Before(time.Now().Add(-finishTime)) {
+				if _, retry := recordEvent(e.sink, event); !retry {
+					delete(e.eventCache, isomorphicKey)
+				}
+			}
+		} else if event.EventTime.Time.Before(time.Now().Add(-finishTime)) {
+			delete(e.eventCache, isomorphicKey)
+		}
+	}
+}
+
+// NewRecorder returns an EventRecorder that records events with the given event source.
+func (e *eventBroadcasterImpl) NewRecorder(scheme *runtime.Scheme, reportingController string) EventRecorder {
+	hostname, _ := os.Hostname()
+	reportingInstance := reportingController + "-" + hostname
+	return &recorderImpl{scheme, reportingController, reportingInstance, e.Broadcaster, clock.RealClock{}}
+}
+
+func (e *eventBroadcasterImpl) recordToSink(event *eventsv1.Event, clock clock.Clock) {
+	// Make a copy before modification, because there could be multiple listeners.
+	eventCopy := event.DeepCopy()
+	go func() {
+		evToRecord := func() *eventsv1.Event {
+			e.mu.Lock()
+			defer e.mu.Unlock()
+			eventKey := getKey(eventCopy)
+			isomorphicEvent, isIsomorphic := e.eventCache[eventKey]
+			if isIsomorphic {
+				if isomorphicEvent.Series != nil {
+					isomorphicEvent.Series.Count++
+					isomorphicEvent.Series.LastObservedTime = metav1.MicroTime{Time: clock.Now()}
+					return nil
+				}
+				isomorphicEvent.Series = &eventsv1.EventSeries{
+					Count:            1,
+					LastObservedTime: metav1.MicroTime{Time: clock.Now()},
+				}
+				return isomorphicEvent
+			}
+			e.eventCache[eventKey] = eventCopy
+			return eventCopy
+		}()
+		if evToRecord != nil {
+			recordedEvent := e.attemptRecording(evToRecord)
+			if recordedEvent != nil {
+				recordedEventKey := getKey(recordedEvent)
+				e.mu.Lock()
+				defer e.mu.Unlock()
+				e.eventCache[recordedEventKey] = recordedEvent
+			}
+		}
+	}()
+}
+
+func (e *eventBroadcasterImpl) attemptRecording(event *eventsv1.Event) *eventsv1.Event {
+	tries := 0
+	for {
+		if recordedEvent, retry := recordEvent(e.sink, event); !retry {
+			return recordedEvent
+		}
+		tries++
+		if tries >= maxTriesPerEvent {
+			klog.Errorf("Unable to write event '%#v' (retry limit exceeded!)", event)
+			return nil
+		}
+		// Randomize sleep so that various clients won't all be
+		// synced up if the master goes down.
+		time.Sleep(wait.Jitter(e.sleepDuration, 0.25))
+	}
+}
+
+func recordEvent(sink EventSink, event *eventsv1.Event) (*eventsv1.Event, bool) {
+	var newEvent *eventsv1.Event
+	var err error
+	isEventSeries := event.Series != nil
+	if isEventSeries {
+		patch, patchBytesErr := createPatchBytesForSeries(event)
+		if patchBytesErr != nil {
+			klog.Errorf("Unable to calculate diff, no merge is possible: %v", patchBytesErr)
+			return nil, false
+		}
+		newEvent, err = sink.Patch(event, patch)
+	}
+	// Update can fail because the event may have been removed and it no longer exists.
+	if !isEventSeries || (isEventSeries && util.IsKeyNotFoundError(err)) {
+		// Making sure that ResourceVersion is empty on creation
+		event.ResourceVersion = ""
+		newEvent, err = sink.Create(event)
+	}
+	if err == nil {
+		return newEvent, false
+	}
+	// If we can't contact the server, then hold everything while we keep trying.
+	// Otherwise, something about the event is malformed and we should abandon it.
+	switch err.(type) {
+	case *restclient.RequestConstructionError:
+		// We will construct the request the same next time, so don't keep trying.
+		klog.Errorf("Unable to construct event '%#v': '%v' (will not retry!)", event, err)
+		return nil, false
+	case *errors.StatusError:
+		if errors.IsAlreadyExists(err) {
+			klog.V(5).Infof("Server rejected event '%#v': '%v' (will not retry!)", event, err)
+		} else {
+			klog.Errorf("Server rejected event '%#v': '%v' (will not retry!)", event, err)
+		}
+		return nil, false
+	case *errors.UnexpectedObjectError:
+		// We don't expect this; it implies the server's response didn't match a
+		// known pattern. Go ahead and retry.
+	default:
+		// This case includes actual http transport errors. Go ahead and retry.
+	}
+	klog.Errorf("Unable to write event: '%v' (may retry after sleeping)", err)
+	return nil, true
+}
+
+func createPatchBytesForSeries(event *eventsv1.Event) ([]byte, error) {
+	oldEvent := event.DeepCopy()
+	oldEvent.Series = nil
+	oldData, err := json.Marshal(oldEvent)
+	if err != nil {
+		return nil, err
+	}
+	newData, err := json.Marshal(event)
+	if err != nil {
+		return nil, err
+	}
+	return strategicpatch.CreateTwoWayMergePatch(oldData, newData, eventsv1.Event{})
+}
+
+func getKey(event *eventsv1.Event) eventKey {
+	key := eventKey{
+		action:              event.Action,
+		reason:              event.Reason,
+		reportingController: event.ReportingController,
+		regarding:           event.Regarding,
+	}
+	if event.Related != nil {
+		key.related = *event.Related
+	}
+	return key
+}
+
+// StartEventWatcher starts sending events received from this EventBroadcaster to the given event handler function.
+// The return value is used to stop recording
+func (e *eventBroadcasterImpl) StartEventWatcher(eventHandler func(event runtime.Object)) func() {
+	watcher := e.Watch()
+	go func() {
+		defer utilruntime.HandleCrash()
+		for {
+			watchEvent, ok := <-watcher.ResultChan()
+			if !ok {
+				return
+			}
+			eventHandler(watchEvent.Object)
+		}
+	}()
+	return watcher.Stop
+}
+
+func (e *eventBroadcasterImpl) startRecordingEvents(stopCh <-chan struct{}) {
+	eventHandler := func(obj runtime.Object) {
+		event, ok := obj.(*eventsv1.Event)
+		if !ok {
+			klog.Errorf("unexpected type, expected eventsv1.Event")
+			return
+		}
+		e.recordToSink(event, clock.RealClock{})
+	}
+	stopWatcher := e.StartEventWatcher(eventHandler)
+	go func() {
+		<-stopCh
+		stopWatcher()
+	}()
+}
+
+// StartRecordingToSink starts sending events received from the specified eventBroadcaster to the given sink.
+func (e *eventBroadcasterImpl) StartRecordingToSink(stopCh <-chan struct{}) {
+	go wait.Until(e.refreshExistingEventSeries, refreshTime, stopCh)
+	go wait.Until(e.finishSeries, finishTime, stopCh)
+	e.startRecordingEvents(stopCh)
+}
+
+type eventBroadcasterAdapterImpl struct {
+	coreClient          typedv1core.EventsGetter
+	coreBroadcaster     record.EventBroadcaster
+	eventsv1Client      typedeventsv1.EventsV1Interface
+	eventsv1Broadcaster EventBroadcaster
+}
+
+// NewEventBroadcasterAdapter creates a wrapper around new and legacy broadcasters to simplify
+// migration of individual components to the new Event API.
+func NewEventBroadcasterAdapter(client clientset.Interface) EventBroadcasterAdapter {
+	eventClient := &eventBroadcasterAdapterImpl{}
+	if _, err := client.Discovery().ServerResourcesForGroupVersion(eventsv1.SchemeGroupVersion.String()); err == nil {
+		eventClient.eventsv1Client = client.EventsV1()
+		eventClient.eventsv1Broadcaster = NewBroadcaster(&EventSinkImpl{Interface: eventClient.eventsv1Client})
+	}
+	// Even though there can soon exist cases when coreBroadcaster won't really be needed,
+	// we create it unconditionally because its overhead is minor and will simplify using usage
+	// patterns of this library in all components.
+	eventClient.coreClient = client.CoreV1()
+	eventClient.coreBroadcaster = record.NewBroadcaster()
+	return eventClient
+}
+
+// StartRecordingToSink starts sending events received from the specified eventBroadcaster to the given sink.
+func (e *eventBroadcasterAdapterImpl) StartRecordingToSink(stopCh <-chan struct{}) {
+	if e.eventsv1Broadcaster != nil && e.eventsv1Client != nil {
+		e.eventsv1Broadcaster.StartRecordingToSink(stopCh)
+	}
+	if e.coreBroadcaster != nil && e.coreClient != nil {
+		e.coreBroadcaster.StartRecordingToSink(&typedv1core.EventSinkImpl{Interface: e.coreClient.Events("")})
+	}
+}
+
+func (e *eventBroadcasterAdapterImpl) NewRecorder(name string) EventRecorder {
+	if e.eventsv1Broadcaster != nil && e.eventsv1Client != nil {
+		return e.eventsv1Broadcaster.NewRecorder(scheme.Scheme, name)
+	}
+	return record.NewEventRecorderAdapter(e.DeprecatedNewLegacyRecorder(name))
+}
+
+func (e *eventBroadcasterAdapterImpl) DeprecatedNewLegacyRecorder(name string) record.EventRecorder {
+	return e.coreBroadcaster.NewRecorder(scheme.Scheme, corev1.EventSource{Component: name})
+}
+
+func (e *eventBroadcasterAdapterImpl) Shutdown() {
+	if e.coreBroadcaster != nil {
+		e.coreBroadcaster.Shutdown()
+	}
+	if e.eventsv1Broadcaster != nil {
+		e.eventsv1Broadcaster.Shutdown()
+	}
+}

vendor/k8s.io/client-go/tools/events/event_recorder.go

@@ -0,0 +1,88 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package events
+
+import (
+	"fmt"
+	"time"
+
+	v1 "k8s.io/api/core/v1"
+	eventsv1 "k8s.io/api/events/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/clock"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/apimachinery/pkg/watch"
+	"k8s.io/client-go/tools/record/util"
+	"k8s.io/client-go/tools/reference"
+	"k8s.io/klog/v2"
+)
+
+type recorderImpl struct {
+	scheme              *runtime.Scheme
+	reportingController string
+	reportingInstance   string
+	*watch.Broadcaster
+	clock clock.Clock
+}
+
+func (recorder *recorderImpl) Eventf(regarding runtime.Object, related runtime.Object, eventtype, reason, action, note string, args ...interface{}) {
+	timestamp := metav1.MicroTime{time.Now()}
+	message := fmt.Sprintf(note, args...)
+	refRegarding, err := reference.GetReference(recorder.scheme, regarding)
+	if err != nil {
+		klog.Errorf("Could not construct reference to: '%#v' due to: '%v'. Will not report event: '%v' '%v' '%v'", regarding, err, eventtype, reason, message)
+		return
+	}
+	refRelated, err := reference.GetReference(recorder.scheme, related)
+	if err != nil {
+		klog.V(9).Infof("Could not construct reference to: '%#v' due to: '%v'.", related, err)
+	}
+	if !util.ValidateEventType(eventtype) {
+		klog.Errorf("Unsupported event type: '%v'", eventtype)
+		return
+	}
+	event := recorder.makeEvent(refRegarding, refRelated, timestamp, eventtype, reason, message, recorder.reportingController, recorder.reportingInstance, action)
+	go func() {
+		defer utilruntime.HandleCrash()
+		recorder.Action(watch.Added, event)
+	}()
+}
+
+func (recorder *recorderImpl) makeEvent(refRegarding *v1.ObjectReference, refRelated *v1.ObjectReference, timestamp metav1.MicroTime, eventtype, reason, message string, reportingController string, reportingInstance string, action string) *eventsv1.Event {
+	t := metav1.Time{Time: recorder.clock.Now()}
+	namespace := refRegarding.Namespace
+	if namespace == "" {
+		namespace = metav1.NamespaceDefault
+	}
+	return &eventsv1.Event{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      fmt.Sprintf("%v.%x", refRegarding.Name, t.UnixNano()),
+			Namespace: namespace,
+		},
+		EventTime:           timestamp,
+		Series:              nil,
+		ReportingController: reportingController,
+		ReportingInstance:   reportingInstance,
+		Action:              action,
+		Reason:              reason,
+		Regarding:           *refRegarding,
+		Related:             refRelated,
+		Note:                message,
+		Type:                eventtype,
+	}
+}

vendor/k8s.io/client-go/tools/events/fake.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package events
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+// FakeRecorder is used as a fake during tests. It is thread safe. It is usable
+// when created manually and not by NewFakeRecorder, however all events may be
+// thrown away in this case.
+type FakeRecorder struct {
+	Events chan string
+}
+
+// Eventf emits an event
+func (f *FakeRecorder) Eventf(regarding runtime.Object, related runtime.Object, eventtype, reason, action, note string, args ...interface{}) {
+	if f.Events != nil {
+		f.Events <- fmt.Sprintf(eventtype+" "+reason+" "+note, args...)
+	}
+}
+
+// NewFakeRecorder creates new fake event recorder with event channel with
+// buffer of given size.
+func NewFakeRecorder(bufferSize int) *FakeRecorder {
+	return &FakeRecorder{
+		Events: make(chan string, bufferSize),
+	}
+}

vendor/k8s.io/client-go/tools/events/helper.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package events
+
+import (
+	"fmt"
+
+	corev1 "k8s.io/api/core/v1"
+	eventsv1 "k8s.io/api/events/v1"
+	eventsv1beta1 "k8s.io/api/events/v1beta1"
+	"k8s.io/apimachinery/pkg/fields"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+var mapping = map[schema.GroupVersion]string{
+	eventsv1.SchemeGroupVersion:      "regarding",
+	eventsv1beta1.SchemeGroupVersion: "regarding",
+	corev1.SchemeGroupVersion:        "involvedObject",
+}
+
+// GetFieldSelector returns the appropriate field selector based on the API version being used to communicate with the server.
+// The returned field selector can be used with List and Watch to filter desired events.
+func GetFieldSelector(eventsGroupVersion schema.GroupVersion, regardingGroupVersionKind schema.GroupVersionKind, regardingName string, regardingUID types.UID) (fields.Selector, error) {
+	field := fields.Set{}
+
+	if _, ok := mapping[eventsGroupVersion]; !ok {
+		return nil, fmt.Errorf("unknown version %v", eventsGroupVersion)
+	}
+	prefix := mapping[eventsGroupVersion]
+
+	if len(regardingName) > 0 {
+		field[prefix+".name"] = regardingName
+	}
+
+	if len(regardingGroupVersionKind.Kind) > 0 {
+		field[prefix+".kind"] = regardingGroupVersionKind.Kind
+	}
+
+	regardingGroupVersion := regardingGroupVersionKind.GroupVersion()
+	if !regardingGroupVersion.Empty() {
+		field[prefix+".apiVersion"] = regardingGroupVersion.String()
+	}
+
+	if len(regardingUID) > 0 {
+		field[prefix+".uid"] = string(regardingUID)
+	}
+
+	return field.AsSelector(), nil
+}

vendor/k8s.io/client-go/tools/events/interfaces.go

@@ -0,0 +1,90 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package events
+
+import (
+	eventsv1 "k8s.io/api/events/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/tools/record"
+)
+
+// EventRecorder knows how to record events on behalf of an EventSource.
+type EventRecorder interface {
+	// Eventf constructs an event from the given information and puts it in the queue for sending.
+	// 'regarding' is the object this event is about. Event will make a reference-- or you may also
+	// pass a reference to the object directly.
+	// 'related' is the secondary object for more complex actions. E.g. when regarding object triggers
+	// a creation or deletion of related object.
+	// 'type' of this event, and can be one of Normal, Warning. New types could be added in future
+	// 'reason' is the reason this event is generated. 'reason' should be short and unique; it
+	// should be in UpperCamelCase format (starting with a capital letter). "reason" will be used
+	// to automate handling of events, so imagine people writing switch statements to handle them.
+	// You want to make that easy.
+	// 'action' explains what happened with regarding/what action did the ReportingController
+	// (ReportingController is a type of a Controller reporting an Event, e.g. k8s.io/node-controller, k8s.io/kubelet.)
+	// take in regarding's name; it should be in UpperCamelCase format (starting with a capital letter).
+	// 'note' is intended to be human readable.
+	Eventf(regarding runtime.Object, related runtime.Object, eventtype, reason, action, note string, args ...interface{})
+}
+
+// EventBroadcaster knows how to receive events and send them to any EventSink, watcher, or log.
+type EventBroadcaster interface {
+	// StartRecordingToSink starts sending events received from the specified eventBroadcaster.
+	StartRecordingToSink(stopCh <-chan struct{})
+
+	// NewRecorder returns an EventRecorder that can be used to send events to this EventBroadcaster
+	// with the event source set to the given event source.
+	NewRecorder(scheme *runtime.Scheme, reportingController string) EventRecorder
+
+	// StartEventWatcher enables you to watch for emitted events without usage
+	// of StartRecordingToSink. This lets you also process events in a custom way (e.g. in tests).
+	// NOTE: events received on your eventHandler should be copied before being used.
+	// TODO: figure out if this can be removed.
+	StartEventWatcher(eventHandler func(event runtime.Object)) func()
+
+	// Shutdown shuts down the broadcaster
+	Shutdown()
+}
+
+// EventSink knows how to store events (client-go implements it.)
+// EventSink must respect the namespace that will be embedded in 'event'.
+// It is assumed that EventSink will return the same sorts of errors as
+// client-go's REST client.
+type EventSink interface {
+	Create(event *eventsv1.Event) (*eventsv1.Event, error)
+	Update(event *eventsv1.Event) (*eventsv1.Event, error)
+	Patch(oldEvent *eventsv1.Event, data []byte) (*eventsv1.Event, error)
+}
+
+// EventBroadcasterAdapter is a auxiliary interface to simplify migration to
+// the new events API. It is a wrapper around new and legacy broadcasters
+// that smartly chooses which one to use.
+//
+// Deprecated: This interface will be removed once migration is completed.
+type EventBroadcasterAdapter interface {
+	// StartRecordingToSink starts sending events received from the specified eventBroadcaster.
+	StartRecordingToSink(stopCh <-chan struct{})
+
+	// NewRecorder creates a new Event Recorder with specified name.
+	NewRecorder(name string) EventRecorder
+
+	// DeprecatedNewLegacyRecorder creates a legacy Event Recorder with specific name.
+	DeprecatedNewLegacyRecorder(name string) record.EventRecorder
+
+	// Shutdown shuts down the broadcaster.
+	Shutdown()
+}