rebase: update all k8s packages to 0.27.2

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

vendor/k8s.io/component-base/config/types.go

@@ -74,7 +74,7 @@ type LeaderElectionConfiguration struct {
 type DebuggingConfiguration struct {
 	// enableProfiling enables profiling via web interface host:port/debug/pprof/
 	EnableProfiling bool
-	// enableContentionProfiling enables lock contention profiling, if
+	// enableContentionProfiling enables block profiling, if
 	// enableProfiling is true.
 	EnableContentionProfiling bool
 }

vendor/k8s.io/component-base/config/v1alpha1/types.go

@@ -60,7 +60,7 @@ type LeaderElectionConfiguration struct {
 type DebuggingConfiguration struct {
 	// enableProfiling enables profiling via web interface host:port/debug/pprof/
 	EnableProfiling *bool `json:"enableProfiling,omitempty"`
-	// enableContentionProfiling enables lock contention profiling, if
+	// enableContentionProfiling enables block profiling, if
 	// enableProfiling is true.
 	EnableContentionProfiling *bool `json:"enableContentionProfiling,omitempty"`
 }

vendor/k8s.io/component-base/logs/api/v1/options.go

@@ -19,7 +19,9 @@ package v1
 import (
 	"flag"
 	"fmt"
+	"io"
 	"math"
+	"os"
 	"strings"
 	"time"
 
@@ -31,6 +33,7 @@ import (
 	"k8s.io/apimachinery/pkg/util/validation/field"
 	cliflag "k8s.io/component-base/cli/flag"
 	"k8s.io/component-base/featuregate"
+	"k8s.io/component-base/logs/internal/setverbositylevel"
 	"k8s.io/component-base/logs/klogflags"
 )
 
@@ -62,18 +65,41 @@ func NewLoggingConfiguration() *LoggingConfiguration {
 // The optional FeatureGate controls logging features. If nil, the default for
 // these features is used.
 func ValidateAndApply(c *LoggingConfiguration, featureGate featuregate.FeatureGate) error {
-	return ValidateAndApplyAsField(c, featureGate, nil)
+	return validateAndApply(c, nil, featureGate, nil)
+}
+
+// ValidateAndApplyWithOptions is a variant of ValidateAndApply which accepts
+// additional options beyond those that can be configured through the API. This
+// is meant for testing.
+func ValidateAndApplyWithOptions(c *LoggingConfiguration, options *LoggingOptions, featureGate featuregate.FeatureGate) error {
+	return validateAndApply(c, options, featureGate, nil)
+}
+
+// +k8s:deepcopy-gen=false
+
+// LoggingOptions can be used with ValidateAndApplyWithOptions to override
+// certain global defaults.
+type LoggingOptions struct {
+	// ErrorStream can be used to override the os.Stderr default.
+	ErrorStream io.Writer
+
+	// InfoStream can be used to override the os.Stdout default.
+	InfoStream io.Writer
 }
 
 // ValidateAndApplyAsField is a variant of ValidateAndApply that should be used
 // when the LoggingConfiguration is embedded in some larger configuration
 // structure.
 func ValidateAndApplyAsField(c *LoggingConfiguration, featureGate featuregate.FeatureGate, fldPath *field.Path) error {
+	return validateAndApply(c, nil, featureGate, fldPath)
+}
+
+func validateAndApply(c *LoggingConfiguration, options *LoggingOptions, featureGate featuregate.FeatureGate, fldPath *field.Path) error {
 	errs := Validate(c, featureGate, fldPath)
 	if len(errs) > 0 {
 		return errs.ToAggregate()
 	}
-	return apply(c, featureGate)
+	return apply(c, options, featureGate)
 }
 
 // Validate can be used to check for invalid settings without applying them.
@@ -156,7 +182,7 @@ func featureEnabled(featureGate featuregate.FeatureGate, feature featuregate.Fea
 	return enabled
 }
 
-func apply(c *LoggingConfiguration, featureGate featuregate.FeatureGate) error {
+func apply(c *LoggingConfiguration, options *LoggingOptions, featureGate featuregate.FeatureGate) error {
 	contextualLoggingEnabled := contextualLoggingDefault
 	if featureGate != nil {
 		contextualLoggingEnabled = featureGate.Enabled(ContextualLogging)
@@ -167,8 +193,19 @@ func apply(c *LoggingConfiguration, featureGate featuregate.FeatureGate) error {
 	if format.factory == nil {
 		klog.ClearLogger()
 	} else {
-		log, flush := format.factory.Create(*c)
-		klog.SetLoggerWithOptions(log, klog.ContextualLogger(contextualLoggingEnabled), klog.FlushLogger(flush))
+		if options == nil {
+			options = &LoggingOptions{
+				ErrorStream: os.Stderr,
+				InfoStream:  os.Stdout,
+			}
+		}
+		log, control := format.factory.Create(*c, *options)
+		if control.SetVerbosityLevel != nil {
+			setverbositylevel.Mutex.Lock()
+			defer setverbositylevel.Mutex.Unlock()
+			setverbositylevel.Callbacks = append(setverbositylevel.Callbacks, control.SetVerbosityLevel)
+		}
+		klog.SetLoggerWithOptions(log, klog.ContextualLogger(contextualLoggingEnabled), klog.FlushLogger(control.Flush))
 	}
 	if err := loggingFlags.Lookup("v").Value.Set(VerbosityLevelPflag(&c.Verbosity).String()); err != nil {
 		return fmt.Errorf("internal error while setting klog verbosity: %v", err)
@@ -183,6 +220,41 @@ func apply(c *LoggingConfiguration, featureGate featuregate.FeatureGate) error {
 
 // AddFlags adds command line flags for the configuration.
 func AddFlags(c *LoggingConfiguration, fs *pflag.FlagSet) {
+	addFlags(c, fs)
+}
+
+// AddGoFlags is a variant of AddFlags for a standard FlagSet.
+func AddGoFlags(c *LoggingConfiguration, fs *flag.FlagSet) {
+	addFlags(c, goFlagSet{FlagSet: fs})
+}
+
+// flagSet is the interface implemented by pflag.FlagSet, with
+// just those methods defined which are needed by addFlags.
+type flagSet interface {
+	BoolVar(p *bool, name string, value bool, usage string)
+	DurationVar(p *time.Duration, name string, value time.Duration, usage string)
+	StringVar(p *string, name string, value string, usage string)
+	Var(value pflag.Value, name string, usage string)
+	VarP(value pflag.Value, name, shorthand, usage string)
+}
+
+// goFlagSet implements flagSet for a stdlib flag.FlagSet.
+type goFlagSet struct {
+	*flag.FlagSet
+}
+
+func (fs goFlagSet) Var(value pflag.Value, name string, usage string) {
+	fs.FlagSet.Var(value, name, usage)
+}
+
+func (fs goFlagSet) VarP(value pflag.Value, name, shorthand, usage string) {
+	// Ignore shorthand, it's not needed and not supported.
+	fs.FlagSet.Var(value, name, usage)
+}
+
+// addFlags can be used with both flag.FlagSet and pflag.FlagSet. The internal
+// interface definition avoids duplicating this code.
+func addFlags(c *LoggingConfiguration, fs flagSet) {
 	formats := logRegistry.list()
 	fs.StringVar(&c.Format, "logging-format", c.Format, fmt.Sprintf("Sets the log format. Permitted formats: %s.", formats))
 	// No new log formats should be added after generation is of flag options

vendor/k8s.io/component-base/logs/api/v1/registry.go

@@ -39,14 +39,29 @@ type logFormat struct {
 	feature featuregate.Feature
 }
 
+// +k8s:deepcopy-gen=false
+
+// RuntimeControl provides operations that aren't available through the normal
+// Logger or LogSink API.
+type RuntimeControl struct {
+	// Flush ensures that all in-memory data is written.
+	// May be nil.
+	Flush func()
+
+	// SetVerbosityLevel changes the level for all Logger instances
+	// derived from the initial one. May be nil.
+	//
+	// The parameter is intentionally a plain uint32 instead of
+	// VerbosityLevel to enable implementations that don't need to import
+	// the API (helps avoid circular dependencies).
+	SetVerbosityLevel func(v uint32) error
+}
+
 // LogFormatFactory provides support for a certain additional,
 // non-default log format.
 type LogFormatFactory interface {
 	// Create returns a logger with the requested configuration.
-	// Returning a flush function for the logger is optional.
-	// If provided, the caller must ensure that it is called
-	// periodically (if desired) and at program exit.
-	Create(c LoggingConfiguration) (log logr.Logger, flush func())
+	Create(c LoggingConfiguration, o LoggingOptions) (logr.Logger, RuntimeControl)
 }
 
 // RegisterLogFormat registers support for a new logging format. This must be called

vendor/k8s.io/component-base/logs/internal/setverbositylevel/setverbositylevel.go

@@ -0,0 +1,34 @@
+/*
+Copyright 2022 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 setverbositylevel stores callbacks that will be invoked by logs.GlogLevel.
+//
+// This is a separate package to avoid a dependency from
+// k8s.io/component-base/logs (uses the callbacks) to
+// k8s.io/component-base/logs/api/v1 (adds them). Not all users of the logs
+// package also use the API.
+package setverbositylevel
+
+import (
+	"sync"
+)
+
+var (
+	// Mutex controls access to the callbacks.
+	Mutex sync.Mutex
+
+	Callbacks []func(v uint32) error
+)

vendor/k8s.io/component-base/logs/logs.go

@@ -23,10 +23,12 @@ import (
 	"flag"
 	"fmt"
 	"log"
+	"strconv"
 	"time"
 
 	"github.com/spf13/pflag"
 	logsapi "k8s.io/component-base/logs/api/v1"
+	"k8s.io/component-base/logs/internal/setverbositylevel"
 	"k8s.io/component-base/logs/klogflags"
 	"k8s.io/klog/v2"
 )
@@ -182,11 +184,26 @@ func NewLogger(prefix string) *log.Logger {
 	return log.New(KlogWriter{}, prefix, 0)
 }
 
-// GlogSetter is a setter to set glog level.
+// GlogSetter modifies the verbosity threshold for the entire program.
+// Some components have HTTP-based APIs for invoking this at runtime.
 func GlogSetter(val string) (string, error) {
+	v, err := strconv.ParseUint(val, 10, 32)
+	if err != nil {
+		return "", err
+	}
+
 	var level klog.Level
 	if err := level.Set(val); err != nil {
 		return "", fmt.Errorf("failed set klog.logging.verbosity %s: %v", val, err)
 	}
+
+	setverbositylevel.Mutex.Lock()
+	defer setverbositylevel.Mutex.Unlock()
+	for _, cb := range setverbositylevel.Callbacks {
+		if err := cb(uint32(v)); err != nil {
+			return "", err
+		}
+	}
+
 	return fmt.Sprintf("successfully set klog.logging.verbosity to %s", val), nil
 }

vendor/k8s.io/component-base/metrics/features/kube_features.go

@@ -29,7 +29,7 @@ const (
 
 func featureGates() map[featuregate.Feature]featuregate.FeatureSpec {
 	return map[featuregate.Feature]featuregate.FeatureSpec{
-		ComponentSLIs: {Default: false, PreRelease: featuregate.Alpha},
+		ComponentSLIs: {Default: true, PreRelease: featuregate.Beta},
 	}
 }
 

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

@@ -97,9 +97,8 @@ func (r *lazyMetric) lazyInit(self kubeCollector, fqName string) {
 //  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.
+// deprecation and will override show-hidden-metrics for the explicitly
+// disabled metric.
 func (r *lazyMetric) preprocessMetric(version semver.Version) {
 	disabledMetricsLock.RLock()
 	defer disabledMetricsLock.RUnlock()

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

@@ -67,6 +67,13 @@ func CustomCollectAndCompare(c metrics.StableCollector, expected io.Reader, metr
 	return GatherAndCompare(registry, expected, metricNames...)
 }
 
+// ScrapeAndCompare calls a remote exporter's endpoint which is expected to return some metrics in
+// plain text format. Then it compares it with the results that the `expected` would return.
+// If the `metricNames` is not empty it would filter the comparison only to the given metric names.
+func ScrapeAndCompare(url string, expected io.Reader, metricNames ...string) error {
+	return testutil.ScrapeAndCompare(url, expected, metricNames...)
+}
+
 // NewFakeKubeRegistry creates a fake `KubeRegistry` that takes the input version as `build in version`.
 // It should only be used in testing scenario especially for the deprecated metrics.
 // The input version format should be `major.minor.patch`, e.g. '1.18.0'.

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

@@ -60,8 +60,7 @@ func NewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues
 // NewLazyMetricWithTimestamp is a helper of NewMetricWithTimestamp.
 //
 // Warning: the Metric 'm' must be the one created by NewLazyConstMetric(),
-//
-//	otherwise, no stability guarantees would be offered.
+// otherwise, no stability guarantees would be offered.
 func NewLazyMetricWithTimestamp(t time.Time, m Metric) Metric {
 	if m == nil {
 		return nil