rebase: update kubernetes dep to 1.24.0

As kubernetes 1.24.0 is released, updating
kubernetes dependencies to 1.24.0

updates: #3086

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/kubernetes/pkg/kubelet/server/metrics/metrics.go

@@ -0,0 +1,101 @@
+/*
+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 (
+	"sync"
+	"time"
+
+	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/legacyregistry"
+)
+
+const (
+	kubeletSubsystem = "kubelet"
+)
+
+var (
+	// HTTPRequests tracks the number of the http requests received since the server started.
+	HTTPRequests = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      kubeletSubsystem,
+			Name:           "http_requests_total",
+			Help:           "Number of the http requests received since the server started",
+			StabilityLevel: metrics.ALPHA,
+		},
+		// server_type aims to differentiate the readonly server and the readwrite server.
+		// long_running marks whether the request is long-running or not.
+		// Currently, long-running requests include exec/attach/portforward/debug.
+		[]string{"method", "path", "server_type", "long_running"},
+	)
+	// HTTPRequestsDuration tracks the duration in seconds to serve http requests.
+	HTTPRequestsDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem: kubeletSubsystem,
+			Name:      "http_requests_duration_seconds",
+			Help:      "Duration in seconds to serve http requests",
+			// Use DefBuckets for now, will customize the buckets if necessary.
+			Buckets:        metrics.DefBuckets,
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"method", "path", "server_type", "long_running"},
+	)
+	// HTTPInflightRequests tracks the number of the inflight http requests.
+	HTTPInflightRequests = metrics.NewGaugeVec(
+		&metrics.GaugeOpts{
+			Subsystem:      kubeletSubsystem,
+			Name:           "http_inflight_requests",
+			Help:           "Number of the inflight http requests",
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"method", "path", "server_type", "long_running"},
+	)
+	// VolumeStatCalDuration tracks the duration in seconds to calculate volume stats.
+	// this metric is mainly for comparison between fsquota monitoring and `du` for disk usage.
+	VolumeStatCalDuration = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem:      kubeletSubsystem,
+			Name:           "volume_metric_collection_duration_seconds",
+			Help:           "Duration in seconds to calculate volume stats",
+			Buckets:        metrics.DefBuckets,
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"metric_source"},
+	)
+)
+
+var registerMetrics sync.Once
+
+// Register all metrics.
+func Register() {
+	registerMetrics.Do(func() {
+		legacyregistry.MustRegister(HTTPRequests)
+		legacyregistry.MustRegister(HTTPRequestsDuration)
+		legacyregistry.MustRegister(HTTPInflightRequests)
+		legacyregistry.MustRegister(VolumeStatCalDuration)
+	})
+}
+
+// SinceInSeconds gets the time since the specified start in seconds.
+func SinceInSeconds(start time.Time) float64 {
+	return time.Since(start).Seconds()
+}
+
+// CollectVolumeStatCalDuration collects the duration in seconds to calculate volume stats.
+func CollectVolumeStatCalDuration(metricSource string, start time.Time) {
+	VolumeStatCalDuration.WithLabelValues(metricSource).Observe(SinceInSeconds(start))
+}