rebase: update kubernetes to v1.21.2

Updated kubernetes packages to latest release.
resizefs package has been included into k8s.io/mount-utils
package. updated code to use the same.

Updates: #1968

Signed-off-by: Rakshith R <rar@redhat.com>

vendor/k8s.io/component-base/metrics/OWNERS

@@ -6,5 +6,6 @@ approvers:
 - RainbowMango
 reviewers:
 - sig-instrumentation-reviewers
+- YoyinZyc
 labels:
 - sig/instrumentation

vendor/k8s.io/component-base/metrics/collector.go

@@ -49,10 +49,10 @@ type StableCollector interface {
 // is a convenient assistant for custom collectors.
 // It is recommend that inherit BaseStableCollector when implementing custom collectors.
 type BaseStableCollector struct {
-	descriptors map[string]*Desc // stores all descriptors by pair<fqName, Desc>, these are collected from DescribeWithStability().
-	registrable map[string]*Desc // stores registrable descriptors by pair<fqName, Desc>, is a subset of descriptors.
-	hidden      map[string]*Desc // stores hidden descriptors by pair<fqName, Desc>, is a subset of descriptors.
-	self        StableCollector
+	descriptors  map[string]*Desc // stores all descriptors by pair<fqName, Desc>, these are collected from DescribeWithStability().
+	registerable map[string]*Desc // stores registerable descriptors by pair<fqName, Desc>, is a subset of descriptors.
+	hidden       map[string]*Desc // stores hidden descriptors by pair<fqName, Desc>, is a subset of descriptors.
+	self         StableCollector
 }
 
 // DescribeWithStability sends all descriptors to the provided channel.
@@ -64,7 +64,7 @@ func (bsc *BaseStableCollector) DescribeWithStability(ch chan<- *Desc) {
 // Describe sends all descriptors to the provided channel.
 // It intend to be called by prometheus registry.
 func (bsc *BaseStableCollector) Describe(ch chan<- *prometheus.Desc) {
-	for _, d := range bsc.registrable {
+	for _, d := range bsc.registerable {
 		ch <- d.toPrometheusDesc()
 	}
 }
@@ -128,11 +128,11 @@ func (bsc *BaseStableCollector) init(self StableCollector) {
 }
 
 func (bsc *BaseStableCollector) trackRegistrableDescriptor(d *Desc) {
-	if bsc.registrable == nil {
-		bsc.registrable = make(map[string]*Desc)
+	if bsc.registerable == nil {
+		bsc.registerable = make(map[string]*Desc)
 	}
 
-	bsc.registrable[d.fqName] = d
+	bsc.registerable[d.fqName] = d
 }
 
 func (bsc *BaseStableCollector) trackHiddenDescriptor(d *Desc) {
@@ -158,7 +158,7 @@ func (bsc *BaseStableCollector) Create(version *semver.Version, self StableColle
 		}
 	}
 
-	if len(bsc.registrable) > 0 {
+	if len(bsc.registerable) > 0 {
 		return true
 	}
 
@@ -173,7 +173,7 @@ func (bsc *BaseStableCollector) ClearState() {
 	}
 
 	bsc.descriptors = nil
-	bsc.registrable = nil
+	bsc.registerable = nil
 	bsc.hidden = nil
 	bsc.self = nil
 }

vendor/k8s.io/component-base/metrics/counter.go

@@ -17,8 +17,10 @@ limitations under the License.
 package metrics
 
 import (
+	"context"
 	"github.com/blang/semver"
 	"github.com/prometheus/client_golang/prometheus"
+	dto "github.com/prometheus/client_model/go"
 )
 
 // Counter is our internal representation for our wrapping struct around prometheus
@@ -30,6 +32,9 @@ type Counter struct {
 	selfCollector
 }
 
+// The implementation of the Metric interface is expected by testutil.GetCounterMetricValue.
+var _ Metric = &Counter{}
+
 // NewCounter returns an object which satisfies the kubeCollector and CounterMetric interfaces.
 // However, the object returned will not measure anything unless the collector is first
 // registered, since the metric is lazily instantiated.
@@ -45,6 +50,14 @@ func NewCounter(opts *CounterOpts) *Counter {
 	return kc
 }
 
+func (c *Counter) Desc() *prometheus.Desc {
+	return c.metric.Desc()
+}
+
+func (c *Counter) Write(to *dto.Metric) error {
+	return c.metric.Write(to)
+}
+
 // Reset resets the underlying prometheus Counter to start counting from 0 again
 func (c *Counter) Reset() {
 	if !c.IsCreated() {
@@ -79,6 +92,11 @@ func (c *Counter) initializeDeprecatedMetric() {
 	c.initializeMetric()
 }
 
+// WithContext allows the normal Counter metric to pass in context. The context is no-op now.
+func (c *Counter) WithContext(ctx context.Context) CounterMetric {
+	return c.CounterMetric
+}
+
 // CounterVec is the internal representation of our wrapping struct around prometheus
 // counterVecs. CounterVec implements both kubeCollector and CounterVecMetric.
 type CounterVec struct {
@@ -94,13 +112,20 @@ type CounterVec struct {
 func NewCounterVec(opts *CounterOpts, labels []string) *CounterVec {
 	opts.StabilityLevel.setDefaults()
 
+	fqName := BuildFQName(opts.Namespace, opts.Subsystem, opts.Name)
+	allowListLock.RLock()
+	if allowList, ok := labelValueAllowLists[fqName]; ok {
+		opts.LabelValueAllowLists = allowList
+	}
+	allowListLock.RUnlock()
+
 	cv := &CounterVec{
 		CounterVec:     noopCounterVec,
 		CounterOpts:    opts,
 		originalLabels: labels,
 		lazyMetric:     lazyMetric{},
 	}
-	cv.lazyInit(cv, BuildFQName(opts.Namespace, opts.Subsystem, opts.Name))
+	cv.lazyInit(cv, fqName)
 	return cv
 }
 
@@ -140,6 +165,9 @@ func (v *CounterVec) WithLabelValues(lvs ...string) CounterMetric {
 	if !v.IsCreated() {
 		return noop // return no-op counter
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainToAllowedList(v.originalLabels, lvs)
+	}
 	return v.CounterVec.WithLabelValues(lvs...)
 }
 
@@ -151,6 +179,9 @@ func (v *CounterVec) With(labels map[string]string) CounterMetric {
 	if !v.IsCreated() {
 		return noop // return no-op counter
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainLabelMap(labels)
+	}
 	return v.CounterVec.With(labels)
 }
 
@@ -176,3 +207,27 @@ func (v *CounterVec) Reset() {
 
 	v.CounterVec.Reset()
 }
+
+// WithContext returns wrapped CounterVec with context
+func (v *CounterVec) WithContext(ctx context.Context) *CounterVecWithContext {
+	return &CounterVecWithContext{
+		ctx:        ctx,
+		CounterVec: *v,
+	}
+}
+
+// CounterVecWithContext is the wrapper of CounterVec with context.
+type CounterVecWithContext struct {
+	CounterVec
+	ctx context.Context
+}
+
+// WithLabelValues is the wrapper of CounterVec.WithLabelValues.
+func (vc *CounterVecWithContext) WithLabelValues(lvs ...string) CounterMetric {
+	return vc.CounterVec.WithLabelValues(lvs...)
+}
+
+// With is the wrapper of CounterVec.With.
+func (vc *CounterVecWithContext) With(labels map[string]string) CounterMetric {
+	return vc.CounterVec.With(labels)
+}

vendor/k8s.io/component-base/metrics/gauge.go

@@ -17,6 +17,7 @@ limitations under the License.
 package metrics
 
 import (
+	"context"
 	"github.com/blang/semver"
 	"github.com/prometheus/client_golang/prometheus"
 
@@ -73,6 +74,11 @@ func (g *Gauge) initializeDeprecatedMetric() {
 	g.initializeMetric()
 }
 
+// WithContext allows the normal Gauge metric to pass in context. The context is no-op now.
+func (g *Gauge) WithContext(ctx context.Context) GaugeMetric {
+	return g.GaugeMetric
+}
+
 // GaugeVec is the internal representation of our wrapping struct around prometheus
 // gaugeVecs. kubeGaugeVec implements both kubeCollector and KubeGaugeVec.
 type GaugeVec struct {
@@ -88,13 +94,20 @@ type GaugeVec struct {
 func NewGaugeVec(opts *GaugeOpts, labels []string) *GaugeVec {
 	opts.StabilityLevel.setDefaults()
 
+	fqName := BuildFQName(opts.Namespace, opts.Subsystem, opts.Name)
+	allowListLock.RLock()
+	if allowList, ok := labelValueAllowLists[fqName]; ok {
+		opts.LabelValueAllowLists = allowList
+	}
+	allowListLock.RUnlock()
+
 	cv := &GaugeVec{
 		GaugeVec:       noopGaugeVec,
 		GaugeOpts:      opts,
 		originalLabels: labels,
 		lazyMetric:     lazyMetric{},
 	}
-	cv.lazyInit(cv, BuildFQName(opts.Namespace, opts.Subsystem, opts.Name))
+	cv.lazyInit(cv, fqName)
 	return cv
 }
 
@@ -133,6 +146,9 @@ func (v *GaugeVec) WithLabelValues(lvs ...string) GaugeMetric {
 	if !v.IsCreated() {
 		return noop // return no-op gauge
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainToAllowedList(v.originalLabels, lvs)
+	}
 	return v.GaugeVec.WithLabelValues(lvs...)
 }
 
@@ -144,6 +160,9 @@ func (v *GaugeVec) With(labels map[string]string) GaugeMetric {
 	if !v.IsCreated() {
 		return noop // return no-op gauge
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainLabelMap(labels)
+	}
 	return v.GaugeVec.With(labels)
 }
 
@@ -191,3 +210,27 @@ func NewGaugeFunc(opts GaugeOpts, function func() float64) GaugeFunc {
 
 	return newGaugeFunc(opts, function, v)
 }
+
+// WithContext returns wrapped GaugeVec with context
+func (v *GaugeVec) WithContext(ctx context.Context) *GaugeVecWithContext {
+	return &GaugeVecWithContext{
+		ctx:      ctx,
+		GaugeVec: *v,
+	}
+}
+
+// GaugeVecWithContext is the wrapper of GaugeVec with context.
+type GaugeVecWithContext struct {
+	GaugeVec
+	ctx context.Context
+}
+
+// WithLabelValues is the wrapper of GaugeVec.WithLabelValues.
+func (vc *GaugeVecWithContext) WithLabelValues(lvs ...string) GaugeMetric {
+	return vc.GaugeVec.WithLabelValues(lvs...)
+}
+
+// With is the wrapper of GaugeVec.With.
+func (vc *GaugeVecWithContext) With(labels map[string]string) GaugeMetric {
+	return vc.GaugeVec.With(labels)
+}

vendor/k8s.io/component-base/metrics/histogram.go

@@ -17,6 +17,7 @@ limitations under the License.
 package metrics
 
 import (
+	"context"
 	"github.com/blang/semver"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -83,6 +84,11 @@ func (h *Histogram) initializeDeprecatedMetric() {
 	h.initializeMetric()
 }
 
+// WithContext allows the normal Histogram metric to pass in context. The context is no-op now.
+func (h *Histogram) WithContext(ctx context.Context) ObserverMetric {
+	return h.ObserverMetric
+}
+
 // HistogramVec is the internal representation of our wrapping struct around prometheus
 // histogramVecs.
 type HistogramVec struct {
@@ -98,13 +104,20 @@ type HistogramVec struct {
 func NewHistogramVec(opts *HistogramOpts, labels []string) *HistogramVec {
 	opts.StabilityLevel.setDefaults()
 
+	fqName := BuildFQName(opts.Namespace, opts.Subsystem, opts.Name)
+	allowListLock.RLock()
+	if allowList, ok := labelValueAllowLists[fqName]; ok {
+		opts.LabelValueAllowLists = allowList
+	}
+	allowListLock.RUnlock()
+
 	v := &HistogramVec{
 		HistogramVec:   noopHistogramVec,
 		HistogramOpts:  opts,
 		originalLabels: labels,
 		lazyMetric:     lazyMetric{},
 	}
-	v.lazyInit(v, BuildFQName(opts.Namespace, opts.Subsystem, opts.Name))
+	v.lazyInit(v, fqName)
 	return v
 }
 
@@ -139,6 +152,9 @@ func (v *HistogramVec) WithLabelValues(lvs ...string) ObserverMetric {
 	if !v.IsCreated() {
 		return noop
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainToAllowedList(v.originalLabels, lvs)
+	}
 	return v.HistogramVec.WithLabelValues(lvs...)
 }
 
@@ -150,6 +166,9 @@ func (v *HistogramVec) With(labels map[string]string) ObserverMetric {
 	if !v.IsCreated() {
 		return noop
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainLabelMap(labels)
+	}
 	return v.HistogramVec.With(labels)
 }
 
@@ -175,3 +194,27 @@ func (v *HistogramVec) Reset() {
 
 	v.HistogramVec.Reset()
 }
+
+// WithContext returns wrapped HistogramVec with context
+func (v *HistogramVec) WithContext(ctx context.Context) *HistogramVecWithContext {
+	return &HistogramVecWithContext{
+		ctx:          ctx,
+		HistogramVec: *v,
+	}
+}
+
+// HistogramVecWithContext is the wrapper of HistogramVec with context.
+type HistogramVecWithContext struct {
+	HistogramVec
+	ctx context.Context
+}
+
+// WithLabelValues is the wrapper of HistogramVec.WithLabelValues.
+func (vc *HistogramVecWithContext) WithLabelValues(lvs ...string) ObserverMetric {
+	return vc.HistogramVec.WithLabelValues(lvs...)
+}
+
+// With is the wrapper of HistogramVec.With.
+func (vc *HistogramVecWithContext) With(labels map[string]string) ObserverMetric {
+	return vc.HistogramVec.With(labels)
+}

vendor/k8s.io/component-base/metrics/metric.go

@@ -87,10 +87,24 @@ func (r *lazyMetric) lazyInit(self kubeCollector, fqName string) {
 	r.self = self
 }
 
-// determineDeprecationStatus figures out whether the lazy metric should be deprecated or not.
+// preprocessMetric figures out whether the lazy metric should be hidden or not.
 // This method takes a Version argument which should be the version of the binary in which
-// this code is currently being executed.
-func (r *lazyMetric) determineDeprecationStatus(version semver.Version) {
+// this code is currently being executed. A metric can be hidden under two conditions:
+//      1.  if the metric is deprecated and is outside the grace period (i.e. has been
+// 			deprecated for more than one release
+//		2. if the metric is manually disabled via a CLI flag.
+//
+// Disclaimer:  disabling a metric via a CLI flag has higher precedence than
+// 			  	deprecation and will override show-hidden-metrics for the explicitly
+//				disabled metric.
+func (r *lazyMetric) preprocessMetric(version semver.Version) {
+	disabledMetricsLock.RLock()
+	defer disabledMetricsLock.RUnlock()
+	// disabling metrics is higher in precedence than showing hidden metrics
+	if _, ok := disabledMetrics[r.fqName]; ok {
+		r.isHidden = true
+		return
+	}
 	selfVersion := r.self.DeprecatedVersion()
 	if selfVersion == nil {
 		return
@@ -99,6 +113,7 @@ func (r *lazyMetric) determineDeprecationStatus(version semver.Version) {
 		if selfVersion.LTE(version) {
 			r.isDeprecated = true
 		}
+
 		if ShouldShowHidden() {
 			klog.Warningf("Hidden metrics (%s) have been manually overridden, showing this very deprecated metric.", r.fqName)
 			return
@@ -126,7 +141,7 @@ func (r *lazyMetric) IsDeprecated() bool {
 // created.
 func (r *lazyMetric) Create(version *semver.Version) bool {
 	if version != nil {
-		r.determineDeprecationStatus(*version)
+		r.preprocessMetric(*version)
 	}
 	// let's not create if this metric is slated to be hidden
 	if r.IsHidden() {

vendor/k8s.io/component-base/metrics/options.go

@@ -18,6 +18,7 @@ package metrics
 
 import (
 	"fmt"
+	"regexp"
 
 	"github.com/blang/semver"
 	"github.com/spf13/pflag"
@@ -28,6 +29,8 @@ import (
 // Options has all parameters needed for exposing metrics from components
 type Options struct {
 	ShowHiddenMetricsForVersion string
+	DisabledMetrics             []string
+	AllowListMapping            map[string]string
 }
 
 // NewOptions returns default metrics options
@@ -37,12 +40,20 @@ func NewOptions() *Options {
 
 // Validate validates metrics flags options.
 func (o *Options) Validate() []error {
+	var errs []error
 	err := validateShowHiddenMetricsVersion(parseVersion(version.Get()), o.ShowHiddenMetricsForVersion)
 	if err != nil {
-		return []error{err}
+		errs = append(errs, err)
 	}
 
-	return nil
+	if err := validateAllowMetricLabel(o.AllowListMapping); err != nil {
+		errs = append(errs, err)
+	}
+
+	if len(errs) == 0 {
+		return nil
+	}
+	return errs
 }
 
 // AddFlags adds flags for exposing component metrics.
@@ -56,13 +67,33 @@ func (o *Options) AddFlags(fs *pflag.FlagSet) {
 			"The format is <major>.<minor>, e.g.: '1.16'. "+
 			"The purpose of this format is make sure you have the opportunity to notice if the next release hides additional metrics, "+
 			"rather than being surprised when they are permanently removed in the release after that.")
+	fs.StringSliceVar(&o.DisabledMetrics,
+		"disabled-metrics",
+		o.DisabledMetrics,
+		"This flag provides an escape hatch for misbehaving metrics. "+
+			"You must provide the fully qualified metric name in order to disable it. "+
+			"Disclaimer: disabling metrics is higher in precedence than showing hidden metrics.")
+	fs.StringToStringVar(&o.AllowListMapping, "allow-metric-labels", o.AllowListMapping,
+		"The map from metric-label to value allow-list of this label. The key's format is <MetricName>,<LabelName>. "+
+			"The value's format is <allowed_value>,<allowed_value>..."+
+			"e.g. metric1,label1='v1,v2,v3', metric1,label2='v1,v2,v3' metric2,label1='v1,v2,v3'.")
 }
 
 // Apply applies parameters into global configuration of metrics.
 func (o *Options) Apply() {
-	if o != nil && len(o.ShowHiddenMetricsForVersion) > 0 {
+	if o == nil {
+		return
+	}
+	if len(o.ShowHiddenMetricsForVersion) > 0 {
 		SetShowHidden()
 	}
+	// set disabled metrics
+	for _, metricName := range o.DisabledMetrics {
+		SetDisabledMetric(metricName)
+	}
+	if o.AllowListMapping != nil {
+		SetLabelAllowListFromCLI(o.AllowListMapping)
+	}
 }
 
 func validateShowHiddenMetricsVersion(currentVersion semver.Version, targetVersionStr string) error {
@@ -77,3 +108,18 @@ func validateShowHiddenMetricsVersion(currentVersion semver.Version, targetVersi
 
 	return nil
 }
+
+func validateAllowMetricLabel(allowListMapping map[string]string) error {
+	if allowListMapping == nil {
+		return nil
+	}
+	metricNameRegex := `[a-zA-Z_:][a-zA-Z0-9_:]*`
+	labelRegex := `[a-zA-Z_][a-zA-Z0-9_]*`
+	for k := range allowListMapping {
+		reg := regexp.MustCompile(metricNameRegex + `,` + labelRegex)
+		if reg.FindString(k) != k {
+			return fmt.Errorf("--allow-metric-labels must has a list of kv pair with format `metricName:labelName=labelValue, labelValue,...`")
+		}
+	}
+	return nil
+}

vendor/k8s.io/component-base/metrics/opts.go

@@ -18,10 +18,17 @@ package metrics
 
 import (
 	"fmt"
+	"strings"
 	"sync"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
+	"k8s.io/apimachinery/pkg/util/sets"
+)
+
+var (
+	labelValueAllowLists = map[string]*MetricLabelAllowList{}
+	allowListLock        sync.RWMutex
 )
 
 // KubeOpts is superset struct for prometheus.Opts. The prometheus Opts structure
@@ -31,15 +38,16 @@ import (
 // Name must be set to a non-empty string. DeprecatedVersion is defined only
 // if the metric for which this options applies is, in fact, deprecated.
 type KubeOpts struct {
-	Namespace         string
-	Subsystem         string
-	Name              string
-	Help              string
-	ConstLabels       map[string]string
-	DeprecatedVersion string
-	deprecateOnce     sync.Once
-	annotateOnce      sync.Once
-	StabilityLevel    StabilityLevel
+	Namespace            string
+	Subsystem            string
+	Name                 string
+	Help                 string
+	ConstLabels          map[string]string
+	DeprecatedVersion    string
+	deprecateOnce        sync.Once
+	annotateOnce         sync.Once
+	StabilityLevel       StabilityLevel
+	LabelValueAllowLists *MetricLabelAllowList
 }
 
 // BuildFQName joins the given three name components by "_". Empty name
@@ -140,16 +148,17 @@ func (o *GaugeOpts) toPromGaugeOpts() prometheus.GaugeOpts {
 // and can safely be left at their zero value, although it is strongly
 // encouraged to set a Help string.
 type HistogramOpts struct {
-	Namespace         string
-	Subsystem         string
-	Name              string
-	Help              string
-	ConstLabels       map[string]string
-	Buckets           []float64
-	DeprecatedVersion string
-	deprecateOnce     sync.Once
-	annotateOnce      sync.Once
-	StabilityLevel    StabilityLevel
+	Namespace            string
+	Subsystem            string
+	Name                 string
+	Help                 string
+	ConstLabels          map[string]string
+	Buckets              []float64
+	DeprecatedVersion    string
+	deprecateOnce        sync.Once
+	annotateOnce         sync.Once
+	StabilityLevel       StabilityLevel
+	LabelValueAllowLists *MetricLabelAllowList
 }
 
 // Modify help description on the metric description.
@@ -186,19 +195,20 @@ func (o *HistogramOpts) toPromHistogramOpts() prometheus.HistogramOpts {
 // a help string and to explicitly set the Objectives field to the desired value
 // as the default value will change in the upcoming v0.10 of the library.
 type SummaryOpts struct {
-	Namespace         string
-	Subsystem         string
-	Name              string
-	Help              string
-	ConstLabels       map[string]string
-	Objectives        map[float64]float64
-	MaxAge            time.Duration
-	AgeBuckets        uint32
-	BufCap            uint32
-	DeprecatedVersion string
-	deprecateOnce     sync.Once
-	annotateOnce      sync.Once
-	StabilityLevel    StabilityLevel
+	Namespace            string
+	Subsystem            string
+	Name                 string
+	Help                 string
+	ConstLabels          map[string]string
+	Objectives           map[float64]float64
+	MaxAge               time.Duration
+	AgeBuckets           uint32
+	BufCap               uint32
+	DeprecatedVersion    string
+	deprecateOnce        sync.Once
+	annotateOnce         sync.Once
+	StabilityLevel       StabilityLevel
+	LabelValueAllowLists *MetricLabelAllowList
 }
 
 // Modify help description on the metric description.
@@ -243,3 +253,49 @@ func (o *SummaryOpts) toPromSummaryOpts() prometheus.SummaryOpts {
 		BufCap:      o.BufCap,
 	}
 }
+
+type MetricLabelAllowList struct {
+	labelToAllowList map[string]sets.String
+}
+
+func (allowList *MetricLabelAllowList) ConstrainToAllowedList(labelNameList, labelValueList []string) {
+	for index, value := range labelValueList {
+		name := labelNameList[index]
+		if allowValues, ok := allowList.labelToAllowList[name]; ok {
+			if !allowValues.Has(value) {
+				labelValueList[index] = "unexpected"
+			}
+		}
+	}
+}
+
+func (allowList *MetricLabelAllowList) ConstrainLabelMap(labels map[string]string) {
+	for name, value := range labels {
+		if allowValues, ok := allowList.labelToAllowList[name]; ok {
+			if !allowValues.Has(value) {
+				labels[name] = "unexpected"
+			}
+		}
+	}
+}
+
+func SetLabelAllowListFromCLI(allowListMapping map[string]string) {
+	allowListLock.Lock()
+	defer allowListLock.Unlock()
+	for metricLabelName, labelValues := range allowListMapping {
+		metricName := strings.Split(metricLabelName, ",")[0]
+		labelName := strings.Split(metricLabelName, ",")[1]
+		valueSet := sets.NewString(strings.Split(labelValues, ",")...)
+
+		allowList, ok := labelValueAllowLists[metricName]
+		if ok {
+			allowList.labelToAllowList[labelName] = valueSet
+		} else {
+			labelToAllowList := make(map[string]sets.String)
+			labelToAllowList[labelName] = valueSet
+			labelValueAllowLists[metricName] = &MetricLabelAllowList{
+				labelToAllowList,
+			}
+		}
+	}
+}

vendor/k8s.io/component-base/metrics/processstarttime.go

@@ -17,11 +17,8 @@ limitations under the License.
 package metrics
 
 import (
-	"os"
 	"time"
 
-	"github.com/prometheus/procfs"
-
 	"k8s.io/klog/v2"
 )
 
@@ -44,24 +41,11 @@ func RegisterProcessStartTime(registrationFunc func(Registerable) error) error {
 		start = float64(time.Now().Unix())
 	}
 	// processStartTime is a lazy metric which only get initialized after registered.
-	// so we have to explicitly create it before setting the label value. Otherwise
-	// it is a noop.
-	if !processStartTime.IsCreated() {
-		processStartTime.initializeMetric()
+	// so we need to register the metric first and then set the value for it
+	if err = registrationFunc(processStartTime); err != nil {
+		return err
 	}
+
 	processStartTime.WithLabelValues().Set(start)
-	return registrationFunc(processStartTime)
-}
-
-func getProcessStart() (float64, error) {
-	pid := os.Getpid()
-	p, err := procfs.NewProc(pid)
-	if err != nil {
-		return 0, err
-	}
-
-	if stat, err := p.Stat(); err == nil {
-		return stat.StartTime()
-	}
-	return 0, err
+	return nil
 }

vendor/k8s.io/component-base/metrics/processstarttime_others.go

@@ -0,0 +1,38 @@
+// +build !windows
+
+/*
+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 (
+	"os"
+
+	"github.com/prometheus/procfs"
+)
+
+func getProcessStart() (float64, error) {
+	pid := os.Getpid()
+	p, err := procfs.NewProc(pid)
+	if err != nil {
+		return 0, err
+	}
+
+	if stat, err := p.Stat(); err == nil {
+		return stat.StartTime()
+	}
+	return 0, err
+}

vendor/k8s.io/component-base/metrics/processstarttime_windows.go

@@ -0,0 +1,33 @@
+// +build windows
+
+/*
+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 (
+	"golang.org/x/sys/windows"
+)
+
+func getProcessStart() (float64, error) {
+	processHandle := windows.CurrentProcess()
+
+	var creationTime, exitTime, kernelTime, userTime windows.Filetime
+	if err := windows.GetProcessTimes(processHandle, &creationTime, &exitTime, &kernelTime, &userTime); err != nil {
+		return 0, err
+	}
+	return float64(creationTime.Nanoseconds() / 1e9), nil
+}

vendor/k8s.io/component-base/metrics/registry.go

@@ -30,10 +30,12 @@ import (
 )
 
 var (
-	showHiddenOnce sync.Once
-	showHidden     atomic.Value
-	registries     []*kubeRegistry // stores all registries created by NewKubeRegistry()
-	registriesLock sync.RWMutex
+	showHiddenOnce      sync.Once
+	disabledMetricsLock sync.RWMutex
+	showHidden          atomic.Value
+	registries          []*kubeRegistry // stores all registries created by NewKubeRegistry()
+	registriesLock      sync.RWMutex
+	disabledMetrics     = map[string]struct{}{}
 )
 
 // shouldHide be used to check if a specific metric with deprecated version should be hidden
@@ -61,6 +63,12 @@ func ValidateShowHiddenMetricsVersion(v string) []error {
 	return nil
 }
 
+func SetDisabledMetric(name string) {
+	disabledMetricsLock.Lock()
+	defer disabledMetricsLock.Unlock()
+	disabledMetrics[name] = struct{}{}
+}
+
 // SetShowHidden will enable showing hidden metrics. This will no-opt
 // after the initial call
 func SetShowHidden() {

vendor/k8s.io/component-base/metrics/summary.go

@@ -17,6 +17,7 @@ limitations under the License.
 package metrics
 
 import (
+	"context"
 	"github.com/blang/semver"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -74,6 +75,11 @@ func (s *Summary) initializeDeprecatedMetric() {
 	s.initializeMetric()
 }
 
+// WithContext allows the normal Summary metric to pass in context. The context is no-op now.
+func (s *Summary) WithContext(ctx context.Context) ObserverMetric {
+	return s.ObserverMetric
+}
+
 // SummaryVec is the internal representation of our wrapping struct around prometheus
 // summaryVecs.
 //
@@ -93,12 +99,19 @@ type SummaryVec struct {
 func NewSummaryVec(opts *SummaryOpts, labels []string) *SummaryVec {
 	opts.StabilityLevel.setDefaults()
 
+	fqName := BuildFQName(opts.Namespace, opts.Subsystem, opts.Name)
+	allowListLock.RLock()
+	if allowList, ok := labelValueAllowLists[fqName]; ok {
+		opts.LabelValueAllowLists = allowList
+	}
+	allowListLock.RUnlock()
+
 	v := &SummaryVec{
 		SummaryOpts:    opts,
 		originalLabels: labels,
 		lazyMetric:     lazyMetric{},
 	}
-	v.lazyInit(v, BuildFQName(opts.Namespace, opts.Subsystem, opts.Name))
+	v.lazyInit(v, fqName)
 	return v
 }
 
@@ -133,6 +146,9 @@ func (v *SummaryVec) WithLabelValues(lvs ...string) ObserverMetric {
 	if !v.IsCreated() {
 		return noop
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainToAllowedList(v.originalLabels, lvs)
+	}
 	return v.SummaryVec.WithLabelValues(lvs...)
 }
 
@@ -144,6 +160,9 @@ func (v *SummaryVec) With(labels map[string]string) ObserverMetric {
 	if !v.IsCreated() {
 		return noop
 	}
+	if v.LabelValueAllowLists != nil {
+		v.LabelValueAllowLists.ConstrainLabelMap(labels)
+	}
 	return v.SummaryVec.With(labels)
 }
 
@@ -169,3 +188,27 @@ func (v *SummaryVec) Reset() {
 
 	v.SummaryVec.Reset()
 }
+
+// WithContext returns wrapped SummaryVec with context
+func (v *SummaryVec) WithContext(ctx context.Context) *SummaryVecWithContext {
+	return &SummaryVecWithContext{
+		ctx:        ctx,
+		SummaryVec: *v,
+	}
+}
+
+// SummaryVecWithContext is the wrapper of SummaryVec with context.
+type SummaryVecWithContext struct {
+	SummaryVec
+	ctx context.Context
+}
+
+// WithLabelValues is the wrapper of SummaryVec.WithLabelValues.
+func (vc *SummaryVecWithContext) WithLabelValues(lvs ...string) ObserverMetric {
+	return vc.SummaryVec.WithLabelValues(lvs...)
+}
+
+// With is the wrapper of SummaryVec.With.
+func (vc *SummaryVecWithContext) With(labels map[string]string) ObserverMetric {
+	return vc.SummaryVec.With(labels)
+}

vendor/k8s.io/component-base/metrics/testutil/metrics.go

@@ -281,21 +281,6 @@ func (hist *Histogram) Average() float64 {
 	return hist.GetSampleSum() / float64(hist.GetSampleCount())
 }
 
-// Clear clears all fields of the wrapped histogram
-func (hist *Histogram) Clear() {
-	if hist.SampleCount != nil {
-		*hist.SampleCount = 0
-	}
-	if hist.SampleSum != nil {
-		*hist.SampleSum = 0
-	}
-	for _, b := range hist.Bucket {
-		if b.CumulativeCount != nil {
-			*b.CumulativeCount = 0
-		}
-	}
-}
-
 // Validate makes sure the wrapped histogram has all necessary fields set and with valid values.
 func (hist *Histogram) Validate() error {
 	if hist.SampleCount == nil || hist.GetSampleCount() == 0 {
@@ -318,7 +303,7 @@ func (hist *Histogram) Validate() error {
 	return nil
 }
 
-// GetGaugeMetricValue extract metric value from GaugeMetric
+// GetGaugeMetricValue extracts metric value from GaugeMetric
 func GetGaugeMetricValue(m metrics.GaugeMetric) (float64, error) {
 	metricProto := &dto.Metric{}
 	if err := m.Write(metricProto); err != nil {
@@ -327,7 +312,7 @@ func GetGaugeMetricValue(m metrics.GaugeMetric) (float64, error) {
 	return metricProto.Gauge.GetValue(), nil
 }
 
-// GetCounterMetricValue extract metric value from CounterMetric
+// GetCounterMetricValue extracts metric value from CounterMetric
 func GetCounterMetricValue(m metrics.CounterMetric) (float64, error) {
 	metricProto := &dto.Metric{}
 	if err := m.(metrics.Metric).Write(metricProto); err != nil {
@@ -336,7 +321,7 @@ func GetCounterMetricValue(m metrics.CounterMetric) (float64, error) {
 	return metricProto.Counter.GetValue(), nil
 }
 
-// GetHistogramMetricValue extract sum of all samples from ObserverMetric
+// GetHistogramMetricValue extracts sum of all samples from ObserverMetric
 func GetHistogramMetricValue(m metrics.ObserverMetric) (float64, error) {
 	metricProto := &dto.Metric{}
 	if err := m.(metrics.Metric).Write(metricProto); err != nil {
@@ -345,6 +330,15 @@ func GetHistogramMetricValue(m metrics.ObserverMetric) (float64, error) {
 	return metricProto.Histogram.GetSampleSum(), nil
 }
 
+// GetHistogramMetricCount extracts count of all samples from ObserverMetric
+func GetHistogramMetricCount(m metrics.ObserverMetric) (uint64, error) {
+	metricProto := &dto.Metric{}
+	if err := m.(metrics.Metric).Write(metricProto); err != nil {
+		return 0, fmt.Errorf("error writing m: %v", err)
+	}
+	return metricProto.Histogram.GetSampleCount(), nil
+}
+
 // LabelsMatch returns true if metric has all expected labels otherwise false
 func LabelsMatch(metric *dto.Metric, labelFilter map[string]string) bool {
 	metricLabels := map[string]string{}