Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/client/metrics/prometheus/prometheus.go

@@ -0,0 +1,71 @@
+/*
+Copyright 2016 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 prometheus creates and registers prometheus metrics with
+// rest clients. To use this package, you just have to import it.
+package prometheus
+
+import (
+	"net/url"
+	"time"
+
+	"k8s.io/client-go/tools/metrics"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var (
+	// requestLatency is a Prometheus Summary metric type partitioned by
+	// "verb" and "url" labels. It is used for the rest client latency metrics.
+	requestLatency = prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Name:    "rest_client_request_latency_seconds",
+			Help:    "Request latency in seconds. Broken down by verb and URL.",
+			Buckets: prometheus.ExponentialBuckets(0.001, 2, 10),
+		},
+		[]string{"verb", "url"},
+	)
+
+	requestResult = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "rest_client_requests_total",
+			Help: "Number of HTTP requests, partitioned by status code, method, and host.",
+		},
+		[]string{"code", "method", "host"},
+	)
+)
+
+func init() {
+	prometheus.MustRegister(requestLatency)
+	prometheus.MustRegister(requestResult)
+	metrics.Register(&latencyAdapter{requestLatency}, &resultAdapter{requestResult})
+}
+
+type latencyAdapter struct {
+	m *prometheus.HistogramVec
+}
+
+func (l *latencyAdapter) Observe(verb string, u url.URL, latency time.Duration) {
+	l.m.WithLabelValues(verb, u.String()).Observe(latency.Seconds())
+}
+
+type resultAdapter struct {
+	m *prometheus.CounterVec
+}
+
+func (r *resultAdapter) Increment(code, method, host string) {
+	r.m.WithLabelValues(code, method, host).Inc()
+}