build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/kubernetes/pkg/scheduler/metrics/metric_recorder.go

@@ -0,0 +1,224 @@
+/*
+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 metrics
+
+import (
+	"time"
+
+	"k8s.io/component-base/metrics"
+)
+
+// MetricRecorder represents a metric recorder which takes action when the
+// metric Inc(), Dec() and Clear()
+type MetricRecorder interface {
+	Inc()
+	Dec()
+	Clear()
+}
+
+var _ MetricRecorder = &PendingPodsRecorder{}
+
+// PendingPodsRecorder is an implementation of MetricRecorder
+type PendingPodsRecorder struct {
+	recorder metrics.GaugeMetric
+}
+
+// NewActivePodsRecorder returns ActivePods in a Prometheus metric fashion
+func NewActivePodsRecorder() *PendingPodsRecorder {
+	return &PendingPodsRecorder{
+		recorder: ActivePods(),
+	}
+}
+
+// NewUnschedulablePodsRecorder returns UnschedulablePods in a Prometheus metric fashion
+func NewUnschedulablePodsRecorder() *PendingPodsRecorder {
+	return &PendingPodsRecorder{
+		recorder: UnschedulablePods(),
+	}
+}
+
+// NewBackoffPodsRecorder returns BackoffPods in a Prometheus metric fashion
+func NewBackoffPodsRecorder() *PendingPodsRecorder {
+	return &PendingPodsRecorder{
+		recorder: BackoffPods(),
+	}
+}
+
+// NewGatedPodsRecorder returns GatedPods in a Prometheus metric fashion
+func NewGatedPodsRecorder() *PendingPodsRecorder {
+	return &PendingPodsRecorder{
+		recorder: GatedPods(),
+	}
+}
+
+// Inc increases a metric counter by 1, in an atomic way
+func (r *PendingPodsRecorder) Inc() {
+	r.recorder.Inc()
+}
+
+// Dec decreases a metric counter by 1, in an atomic way
+func (r *PendingPodsRecorder) Dec() {
+	r.recorder.Dec()
+}
+
+// Clear set a metric counter to 0, in an atomic way
+func (r *PendingPodsRecorder) Clear() {
+	r.recorder.Set(float64(0))
+}
+
+// histogramVecMetric is the data structure passed in the buffer channel between the main framework thread
+// and the metricsRecorder goroutine.
+type histogramVecMetric struct {
+	metric      *metrics.HistogramVec
+	labelValues []string
+	value       float64
+}
+
+type gaugeVecMetric struct {
+	metric      *metrics.GaugeVec
+	labelValues []string
+	valueToAdd  float64
+}
+
+type gaugeVecMetricKey struct {
+	metricName string
+	labelValue string
+}
+
+// MetricAsyncRecorder records metric in a separate goroutine to avoid overhead in the critical path.
+type MetricAsyncRecorder struct {
+	// bufferCh is a channel that serves as a metrics buffer before the metricsRecorder goroutine reports it.
+	bufferCh chan *histogramVecMetric
+	// if bufferSize is reached, incoming metrics will be discarded.
+	bufferSize int
+	// how often the recorder runs to flush the metrics.
+	interval time.Duration
+
+	// aggregatedInflightEventMetric is only to record InFlightEvents metric asynchronously.
+	// It's a map from gaugeVecMetricKey to the aggregated value
+	// and the aggregated value is flushed to Prometheus every time the interval is reached.
+	// Note that we don't lock the map deliberately because we assume the queue takes lock before updating the in-flight events.
+	aggregatedInflightEventMetric              map[gaugeVecMetricKey]int
+	aggregatedInflightEventMetricLastFlushTime time.Time
+	aggregatedInflightEventMetricBufferCh      chan *gaugeVecMetric
+
+	// stopCh is used to stop the goroutine which periodically flushes metrics.
+	stopCh <-chan struct{}
+	// IsStoppedCh indicates whether the goroutine is stopped. It's used in tests only to make sure
+	// the metric flushing goroutine is stopped so that tests can collect metrics for verification.
+	IsStoppedCh chan struct{}
+}
+
+func NewMetricsAsyncRecorder(bufferSize int, interval time.Duration, stopCh <-chan struct{}) *MetricAsyncRecorder {
+	recorder := &MetricAsyncRecorder{
+		bufferCh:                      make(chan *histogramVecMetric, bufferSize),
+		bufferSize:                    bufferSize,
+		interval:                      interval,
+		stopCh:                        stopCh,
+		aggregatedInflightEventMetric: make(map[gaugeVecMetricKey]int),
+		aggregatedInflightEventMetricLastFlushTime: time.Now(),
+		aggregatedInflightEventMetricBufferCh:      make(chan *gaugeVecMetric, bufferSize),
+		IsStoppedCh:                                make(chan struct{}),
+	}
+	go recorder.run()
+	return recorder
+}
+
+// ObservePluginDurationAsync observes the plugin_execution_duration_seconds metric.
+// The metric will be flushed to Prometheus asynchronously.
+func (r *MetricAsyncRecorder) ObservePluginDurationAsync(extensionPoint, pluginName, status string, value float64) {
+	r.observeMetricAsync(PluginExecutionDuration, value, pluginName, extensionPoint, status)
+}
+
+// ObserveQueueingHintDurationAsync observes the queueing_hint_execution_duration_seconds metric.
+// The metric will be flushed to Prometheus asynchronously.
+func (r *MetricAsyncRecorder) ObserveQueueingHintDurationAsync(pluginName, event, hint string, value float64) {
+	r.observeMetricAsync(queueingHintExecutionDuration, value, pluginName, event, hint)
+}
+
+// ObserveInFlightEventsAsync observes the in_flight_events metric.
+//
+// Note that this function is not goroutine-safe;
+// we don't lock the map deliberately for the performance reason and we assume the queue (i.e., the caller) takes lock before updating the in-flight events.
+func (r *MetricAsyncRecorder) ObserveInFlightEventsAsync(eventLabel string, valueToAdd float64, forceFlush bool) {
+	r.aggregatedInflightEventMetric[gaugeVecMetricKey{metricName: InFlightEvents.Name, labelValue: eventLabel}] += int(valueToAdd)
+
+	// Only flush the metric to the channel if the interval is reached.
+	// The values are flushed to Prometheus in the run() function, which runs once the interval time.
+	// Note: we implement this flushing here, not in FlushMetrics, because, if we did so, we would need to implement a lock for the map, which we want to avoid.
+	if forceFlush || time.Since(r.aggregatedInflightEventMetricLastFlushTime) > r.interval {
+		for key, value := range r.aggregatedInflightEventMetric {
+			newMetric := &gaugeVecMetric{
+				metric:      InFlightEvents,
+				labelValues: []string{key.labelValue},
+				valueToAdd:  float64(value),
+			}
+			select {
+			case r.aggregatedInflightEventMetricBufferCh <- newMetric:
+			default:
+			}
+		}
+		r.aggregatedInflightEventMetricLastFlushTime = time.Now()
+		// reset
+		r.aggregatedInflightEventMetric = make(map[gaugeVecMetricKey]int)
+	}
+}
+
+func (r *MetricAsyncRecorder) observeMetricAsync(m *metrics.HistogramVec, value float64, labelsValues ...string) {
+	newMetric := &histogramVecMetric{
+		metric:      m,
+		labelValues: labelsValues,
+		value:       value,
+	}
+	select {
+	case r.bufferCh <- newMetric:
+	default:
+	}
+}
+
+// run flushes buffered metrics into Prometheus every second.
+func (r *MetricAsyncRecorder) run() {
+	for {
+		select {
+		case <-r.stopCh:
+			close(r.IsStoppedCh)
+			return
+		default:
+		}
+		r.FlushMetrics()
+		time.Sleep(r.interval)
+	}
+}
+
+// FlushMetrics tries to clean up the bufferCh by reading at most bufferSize metrics.
+func (r *MetricAsyncRecorder) FlushMetrics() {
+	for i := 0; i < r.bufferSize; i++ {
+		select {
+		case m := <-r.bufferCh:
+			m.metric.WithLabelValues(m.labelValues...).Observe(m.value)
+		default:
+			// no more value
+		}
+
+		select {
+		case m := <-r.aggregatedInflightEventMetricBufferCh:
+			m.metric.WithLabelValues(m.labelValues...).Add(m.valueToAdd)
+		default:
+			// no more value
+		}
+	}
+}

e2e/vendor/k8s.io/kubernetes/pkg/scheduler/metrics/metrics.go

@@ -0,0 +1,416 @@
+/*
+Copyright 2015 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 metrics
+
+import (
+	"sync"
+	"time"
+
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/legacyregistry"
+	"k8s.io/kubernetes/pkg/features"
+	volumebindingmetrics "k8s.io/kubernetes/pkg/scheduler/framework/plugins/volumebinding/metrics"
+)
+
+const (
+	// SchedulerSubsystem - subsystem name used by scheduler.
+	SchedulerSubsystem = "scheduler"
+)
+
+// Below are possible values for the work and operation label.
+const (
+	// PrioritizingExtender - prioritizing extender work/operation label value.
+	PrioritizingExtender = "prioritizing_extender"
+	// Binding - binding work/operation label value.
+	Binding = "binding"
+)
+
+const (
+	GoroutineResultSuccess = "success"
+	GoroutineResultError   = "error"
+)
+
+// ExtentionPoints is a list of possible values for the extension_point label.
+var ExtentionPoints = []string{
+	PreFilter,
+	Filter,
+	PreFilterExtensionAddPod,
+	PreFilterExtensionRemovePod,
+	PostFilter,
+	PreScore,
+	Score,
+	ScoreExtensionNormalize,
+	PreBind,
+	Bind,
+	PostBind,
+	Reserve,
+	Unreserve,
+	Permit,
+}
+
+const (
+	PreFilter                   = "PreFilter"
+	Filter                      = "Filter"
+	PreFilterExtensionAddPod    = "PreFilterExtensionAddPod"
+	PreFilterExtensionRemovePod = "PreFilterExtensionRemovePod"
+	PostFilter                  = "PostFilter"
+	PreScore                    = "PreScore"
+	Score                       = "Score"
+	ScoreExtensionNormalize     = "ScoreExtensionNormalize"
+	PreBind                     = "PreBind"
+	Bind                        = "Bind"
+	PostBind                    = "PostBind"
+	Reserve                     = "Reserve"
+	Unreserve                   = "Unreserve"
+	Permit                      = "Permit"
+)
+
+const (
+	QueueingHintResultQueue     = "Queue"
+	QueueingHintResultQueueSkip = "QueueSkip"
+	QueueingHintResultError     = "Error"
+)
+
+const (
+	PodPoppedInFlightEvent = "PodPopped"
+)
+
+// All the histogram based metrics have 1ms as size for the smallest bucket.
+var (
+	scheduleAttempts           *metrics.CounterVec
+	EventHandlingLatency       *metrics.HistogramVec
+	schedulingLatency          *metrics.HistogramVec
+	SchedulingAlgorithmLatency *metrics.Histogram
+	PreemptionVictims          *metrics.Histogram
+	PreemptionAttempts         *metrics.Counter
+	pendingPods                *metrics.GaugeVec
+	InFlightEvents             *metrics.GaugeVec
+	Goroutines                 *metrics.GaugeVec
+
+	// PodSchedulingDuration is deprecated as of Kubernetes v1.28, and will be removed
+	// in v1.31. Please use PodSchedulingSLIDuration instead.
+	PodSchedulingDuration           *metrics.HistogramVec
+	PodSchedulingSLIDuration        *metrics.HistogramVec
+	PodSchedulingAttempts           *metrics.Histogram
+	FrameworkExtensionPointDuration *metrics.HistogramVec
+	PluginExecutionDuration         *metrics.HistogramVec
+
+	PermitWaitDuration    *metrics.HistogramVec
+	CacheSize             *metrics.GaugeVec
+	unschedulableReasons  *metrics.GaugeVec
+	PluginEvaluationTotal *metrics.CounterVec
+
+	// The below two are only available when the QHint feature gate is enabled.
+	queueingHintExecutionDuration *metrics.HistogramVec
+	SchedulerQueueIncomingPods    *metrics.CounterVec
+
+	// The below two are only available when the async-preemption feature gate is enabled.
+	PreemptionGoroutinesDuration       *metrics.HistogramVec
+	PreemptionGoroutinesExecutionTotal *metrics.CounterVec
+
+	// metricsList is a list of all metrics that should be registered always, regardless of any feature gate's value.
+	metricsList []metrics.Registerable
+)
+
+var registerMetrics sync.Once
+
+// Register all metrics.
+func Register() {
+	// Register the metrics.
+	registerMetrics.Do(func() {
+		InitMetrics()
+		RegisterMetrics(metricsList...)
+		volumebindingmetrics.RegisterVolumeSchedulingMetrics()
+
+		if utilfeature.DefaultFeatureGate.Enabled(features.SchedulerQueueingHints) {
+			RegisterMetrics(queueingHintExecutionDuration, InFlightEvents)
+		}
+		if utilfeature.DefaultFeatureGate.Enabled(features.SchedulerAsyncPreemption) {
+			RegisterMetrics(PreemptionGoroutinesDuration, PreemptionGoroutinesExecutionTotal)
+		}
+	})
+}
+
+func InitMetrics() {
+	scheduleAttempts = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "schedule_attempts_total",
+			Help:           "Number of attempts to schedule pods, by the result. 'unschedulable' means a pod could not be scheduled, while 'error' means an internal scheduler problem.",
+			StabilityLevel: metrics.STABLE,
+		}, []string{"result", "profile"})
+
+	EventHandlingLatency = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem: SchedulerSubsystem,
+			Name:      "event_handling_duration_seconds",
+			Help:      "Event handling latency in seconds.",
+			// Start with 0.1ms with the last bucket being [~200ms, Inf)
+			Buckets:        metrics.ExponentialBuckets(0.0001, 2, 12),
+			StabilityLevel: metrics.ALPHA,
+		}, []string{"event"})
+
+	schedulingLatency = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "scheduling_attempt_duration_seconds",
+			Help:           "Scheduling attempt latency in seconds (scheduling algorithm + binding)",
+			Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
+			StabilityLevel: metrics.STABLE,
+		}, []string{"result", "profile"})
+	SchedulingAlgorithmLatency = metrics.NewHistogram(
+		&metrics.HistogramOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "scheduling_algorithm_duration_seconds",
+			Help:           "Scheduling algorithm latency in seconds",
+			Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
+			StabilityLevel: metrics.ALPHA,
+		},
+	)
+	PreemptionVictims = metrics.NewHistogram(
+		&metrics.HistogramOpts{
+			Subsystem: SchedulerSubsystem,
+			Name:      "preemption_victims",
+			Help:      "Number of selected preemption victims",
+			// we think #victims>64 is pretty rare, therefore [64, +Inf) is considered a single bucket.
+			Buckets:        metrics.ExponentialBuckets(1, 2, 7),
+			StabilityLevel: metrics.STABLE,
+		})
+	PreemptionAttempts = metrics.NewCounter(
+		&metrics.CounterOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "preemption_attempts_total",
+			Help:           "Total preemption attempts in the cluster till now",
+			StabilityLevel: metrics.STABLE,
+		})
+	pendingPods = metrics.NewGaugeVec(
+		&metrics.GaugeOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "pending_pods",
+			Help:           "Number of pending pods, by the queue type. 'active' means number of pods in activeQ; 'backoff' means number of pods in backoffQ; 'unschedulable' means number of pods in unschedulablePods that the scheduler attempted to schedule and failed; 'gated' is the number of unschedulable pods that the scheduler never attempted to schedule because they are gated.",
+			StabilityLevel: metrics.STABLE,
+		}, []string{"queue"})
+	InFlightEvents = metrics.NewGaugeVec(
+		&metrics.GaugeOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "inflight_events",
+			Help:           "Number of events currently tracked in the scheduling queue.",
+			StabilityLevel: metrics.ALPHA,
+		}, []string{"event"})
+	Goroutines = metrics.NewGaugeVec(
+		&metrics.GaugeOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "goroutines",
+			Help:           "Number of running goroutines split by the work they do such as binding.",
+			StabilityLevel: metrics.ALPHA,
+		}, []string{"operation"})
+
+	// PodSchedulingDuration is deprecated as of Kubernetes v1.28, and will be removed
+	// in v1.31. Please use PodSchedulingSLIDuration instead.
+	PodSchedulingDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem: SchedulerSubsystem,
+			Name:      "pod_scheduling_duration_seconds",
+			Help:      "E2e latency for a pod being scheduled which may include multiple scheduling attempts.",
+			// Start with 10ms with the last bucket being [~88m, Inf).
+			Buckets:           metrics.ExponentialBuckets(0.01, 2, 20),
+			StabilityLevel:    metrics.STABLE,
+			DeprecatedVersion: "1.29.0",
+		},
+		[]string{"attempts"})
+
+	PodSchedulingSLIDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem: SchedulerSubsystem,
+			Name:      "pod_scheduling_sli_duration_seconds",
+			Help:      "E2e latency for a pod being scheduled, from the time the pod enters the scheduling queue and might involve multiple scheduling attempts.",
+			// Start with 10ms with the last bucket being [~88m, Inf).
+			Buckets:        metrics.ExponentialBuckets(0.01, 2, 20),
+			StabilityLevel: metrics.BETA,
+		},
+		[]string{"attempts"})
+
+	PodSchedulingAttempts = metrics.NewHistogram(
+		&metrics.HistogramOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "pod_scheduling_attempts",
+			Help:           "Number of attempts to successfully schedule a pod.",
+			Buckets:        metrics.ExponentialBuckets(1, 2, 5),
+			StabilityLevel: metrics.STABLE,
+		})
+
+	FrameworkExtensionPointDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem: SchedulerSubsystem,
+			Name:      "framework_extension_point_duration_seconds",
+			Help:      "Latency for running all plugins of a specific extension point.",
+			// Start with 0.1ms with the last bucket being [~200ms, Inf)
+			Buckets:        metrics.ExponentialBuckets(0.0001, 2, 12),
+			StabilityLevel: metrics.STABLE,
+		},
+		[]string{"extension_point", "status", "profile"})
+
+	PluginExecutionDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem: SchedulerSubsystem,
+			Name:      "plugin_execution_duration_seconds",
+			Help:      "Duration for running a plugin at a specific extension point.",
+			// Start with 0.01ms with the last bucket being [~22ms, Inf). We use a small factor (1.5)
+			// so that we have better granularity since plugin latency is very sensitive.
+			Buckets:        metrics.ExponentialBuckets(0.00001, 1.5, 20),
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"plugin", "extension_point", "status"})
+
+	// This is only available when the QHint feature gate is enabled.
+	queueingHintExecutionDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem: SchedulerSubsystem,
+			Name:      "queueing_hint_execution_duration_seconds",
+			Help:      "Duration for running a queueing hint function of a plugin.",
+			// Start with 0.01ms with the last bucket being [~22ms, Inf). We use a small factor (1.5)
+			// so that we have better granularity since plugin latency is very sensitive.
+			Buckets:        metrics.ExponentialBuckets(0.00001, 1.5, 20),
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"plugin", "event", "hint"})
+
+	SchedulerQueueIncomingPods = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "queue_incoming_pods_total",
+			Help:           "Number of pods added to scheduling queues by event and queue type.",
+			StabilityLevel: metrics.STABLE,
+		}, []string{"queue", "event"})
+
+	PermitWaitDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "permit_wait_duration_seconds",
+			Help:           "Duration of waiting on permit.",
+			Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"result"})
+
+	CacheSize = metrics.NewGaugeVec(
+		&metrics.GaugeOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "scheduler_cache_size",
+			Help:           "Number of nodes, pods, and assumed (bound) pods in the scheduler cache.",
+			StabilityLevel: metrics.ALPHA,
+		}, []string{"type"})
+
+	unschedulableReasons = metrics.NewGaugeVec(
+		&metrics.GaugeOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "unschedulable_pods",
+			Help:           "The number of unschedulable pods broken down by plugin name. A pod will increment the gauge for all plugins that caused it to not schedule and so this metric have meaning only when broken down by plugin.",
+			StabilityLevel: metrics.ALPHA,
+		}, []string{"plugin", "profile"})
+
+	PluginEvaluationTotal = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "plugin_evaluation_total",
+			Help:           "Number of attempts to schedule pods by each plugin and the extension point (available only in PreFilter, Filter, PreScore, and Score).",
+			StabilityLevel: metrics.ALPHA,
+		}, []string{"plugin", "extension_point", "profile"})
+
+	PreemptionGoroutinesDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "preemption_goroutines_duration_seconds",
+			Help:           "Duration in seconds for running goroutines for the preemption.",
+			Buckets:        metrics.ExponentialBuckets(0.01, 2, 20),
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"result"})
+
+	PreemptionGoroutinesExecutionTotal = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      SchedulerSubsystem,
+			Name:           "preemption_goroutines_execution_total",
+			Help:           "Number of preemption goroutines executed.",
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"result"})
+
+	metricsList = []metrics.Registerable{
+		scheduleAttempts,
+		schedulingLatency,
+		SchedulingAlgorithmLatency,
+		EventHandlingLatency,
+		PreemptionVictims,
+		PreemptionAttempts,
+		pendingPods,
+		PodSchedulingDuration,
+		PodSchedulingSLIDuration,
+		PodSchedulingAttempts,
+		FrameworkExtensionPointDuration,
+		PluginExecutionDuration,
+		SchedulerQueueIncomingPods,
+		Goroutines,
+		PermitWaitDuration,
+		CacheSize,
+		unschedulableReasons,
+		PluginEvaluationTotal,
+	}
+}
+
+// RegisterMetrics registers a list of metrics.
+// This function is exported because it is intended to be used by out-of-tree plugins to register their custom metrics.
+func RegisterMetrics(extraMetrics ...metrics.Registerable) {
+	for _, metric := range extraMetrics {
+		legacyregistry.MustRegister(metric)
+	}
+}
+
+// GetGather returns the gatherer. It used by test case outside current package.
+func GetGather() metrics.Gatherer {
+	return legacyregistry.DefaultGatherer
+}
+
+// ActivePods returns the pending pods metrics with the label active
+func ActivePods() metrics.GaugeMetric {
+	return pendingPods.With(metrics.Labels{"queue": "active"})
+}
+
+// BackoffPods returns the pending pods metrics with the label backoff
+func BackoffPods() metrics.GaugeMetric {
+	return pendingPods.With(metrics.Labels{"queue": "backoff"})
+}
+
+// UnschedulablePods returns the pending pods metrics with the label unschedulable
+func UnschedulablePods() metrics.GaugeMetric {
+	return pendingPods.With(metrics.Labels{"queue": "unschedulable"})
+}
+
+// GatedPods returns the pending pods metrics with the label gated
+func GatedPods() metrics.GaugeMetric {
+	return pendingPods.With(metrics.Labels{"queue": "gated"})
+}
+
+// SinceInSeconds gets the time since the specified start in seconds.
+func SinceInSeconds(start time.Time) float64 {
+	return time.Since(start).Seconds()
+}
+
+func UnschedulableReason(plugin string, profile string) metrics.GaugeMetric {
+	return unschedulableReasons.With(metrics.Labels{"plugin": plugin, "profile": profile})
+}

e2e/vendor/k8s.io/kubernetes/pkg/scheduler/metrics/profile_metrics.go

@@ -0,0 +1,48 @@
+/*
+Copyright 2020 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 metrics
+
+// This file contains helpers for metrics that are associated to a profile.
+
+var (
+	ScheduledResult     = "scheduled"
+	UnschedulableResult = "unschedulable"
+	ErrorResult         = "error"
+)
+
+// PodScheduled can records a successful scheduling attempt and the duration
+// since `start`.
+func PodScheduled(profile string, duration float64) {
+	observeScheduleAttemptAndLatency(ScheduledResult, profile, duration)
+}
+
+// PodUnschedulable can records a scheduling attempt for an unschedulable pod
+// and the duration since `start`.
+func PodUnschedulable(profile string, duration float64) {
+	observeScheduleAttemptAndLatency(UnschedulableResult, profile, duration)
+}
+
+// PodScheduleError can records a scheduling attempt that had an error and the
+// duration since `start`.
+func PodScheduleError(profile string, duration float64) {
+	observeScheduleAttemptAndLatency(ErrorResult, profile, duration)
+}
+
+func observeScheduleAttemptAndLatency(result, profile string, duration float64) {
+	schedulingLatency.WithLabelValues(result, profile).Observe(duration)
+	scheduleAttempts.WithLabelValues(result, profile).Inc()
+}