update dependencies

Signed-off-by: hongming <talonwan@yunify.com>

vendor/k8s.io/apiserver/pkg/server/egressselector/metrics/metrics.go

@@ -0,0 +1,114 @@
+/*
+Copyright 2017 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/apimachinery/pkg/util/clock"
+	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/legacyregistry"
+)
+
+const (
+	namespace = "apiserver"
+	subsystem = "egress_dialer"
+
+	// ProtocolHTTPConnect means that the proxy protocol is http-connect.
+	ProtocolHTTPConnect = "http_connect"
+	// ProtocolGRPC means that the proxy protocol is the GRPC protocol.
+	ProtocolGRPC = "grpc"
+	// TransportTCP means that the transport is TCP.
+	TransportTCP = "tcp"
+	// TransportUDS means that the transport is UDS.
+	TransportUDS = "uds"
+	// StageConnect indicates that the dial failed at establishing connection to the proxy server.
+	StageConnect = "connect"
+	// StageProxy indicates that the dial failed at requesting the proxy server to proxy.
+	StageProxy = "proxy"
+)
+
+var (
+	// Use buckets ranging from 5 ms to 12.5 seconds.
+	latencyBuckets = []float64{0.005, 0.025, 0.1, 0.5, 2.5, 12.5}
+
+	// Metrics provides access to all dial metrics.
+	Metrics = newDialMetrics()
+)
+
+// DialMetrics instruments dials to proxy server with prometheus metrics.
+type DialMetrics struct {
+	clock     clock.Clock
+	latencies *metrics.HistogramVec
+	failures  *metrics.CounterVec
+}
+
+// newDialMetrics create a new DialMetrics, configured with default metric names.
+func newDialMetrics() *DialMetrics {
+	latencies := metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Namespace:      namespace,
+			Subsystem:      subsystem,
+			Name:           "dial_duration_seconds",
+			Help:           "Dial latency histogram in seconds, labeled by the protocol (http-connect or grpc), transport (tcp or uds)",
+			Buckets:        latencyBuckets,
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"protocol", "transport"},
+	)
+
+	failures := metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Namespace:      namespace,
+			Subsystem:      subsystem,
+			Name:           "dial_failure_count",
+			Help:           "Dial failure count, labeled by the protocol (http-connect or grpc), transport (tcp or uds), and stage (connect or proxy). The stage indicates at which stage the dial failed",
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"protocol", "transport", "stage"},
+	)
+
+	legacyregistry.MustRegister(latencies)
+	legacyregistry.MustRegister(failures)
+	return &DialMetrics{latencies: latencies, failures: failures, clock: clock.RealClock{}}
+}
+
+// Clock returns the clock.
+func (m *DialMetrics) Clock() clock.Clock {
+	return m.clock
+}
+
+// SetClock sets the clock.
+func (m *DialMetrics) SetClock(c clock.Clock) {
+	m.clock = c
+}
+
+// Reset resets the metrics.
+func (m *DialMetrics) Reset() {
+	m.latencies.Reset()
+	m.failures.Reset()
+}
+
+// ObserveDialLatency records the latency of a dial, labeled by protocol, transport.
+func (m *DialMetrics) ObserveDialLatency(elapsed time.Duration, protocol, transport string) {
+	m.latencies.WithLabelValues(protocol, transport).Observe(elapsed.Seconds())
+}
+
+// ObserveDialFailure records a failed dial, labeled by protocol, transport, and the stage the dial failed at.
+func (m *DialMetrics) ObserveDialFailure(protocol, transport, stage string) {
+	m.failures.WithLabelValues(protocol, transport, stage).Inc()
+}