vendor update for E2E framework

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

vendor/k8s.io/kubernetes/pkg/volume/util/metrics.go

@@ -0,0 +1,78 @@
+/*
+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 util
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+var storageOperationMetric = prometheus.NewHistogramVec(
+	prometheus.HistogramOpts{
+		Name:    "storage_operation_duration_seconds",
+		Help:    "Storage operation duration",
+		Buckets: []float64{.1, .25, .5, 1, 2.5, 5, 10, 15, 25, 50},
+	},
+	[]string{"volume_plugin", "operation_name"},
+)
+
+var storageOperationErrorMetric = prometheus.NewCounterVec(
+	prometheus.CounterOpts{
+		Name: "storage_operation_errors_total",
+		Help: "Storage operation errors",
+	},
+	[]string{"volume_plugin", "operation_name"},
+)
+
+func init() {
+	registerMetrics()
+}
+
+func registerMetrics() {
+	prometheus.MustRegister(storageOperationMetric)
+	prometheus.MustRegister(storageOperationErrorMetric)
+}
+
+// OperationCompleteHook returns a hook to call when an operation is completed
+func OperationCompleteHook(plugin, operationName string) func(*error) {
+	requestTime := time.Now()
+	opComplete := func(err *error) {
+		timeTaken := time.Since(requestTime).Seconds()
+		// Create metric with operation name and plugin name
+		if *err != nil {
+			storageOperationErrorMetric.WithLabelValues(plugin, operationName).Inc()
+		} else {
+			storageOperationMetric.WithLabelValues(plugin, operationName).Observe(timeTaken)
+		}
+	}
+	return opComplete
+}
+
+// GetFullQualifiedPluginNameForVolume returns full qualified plugin name for
+// given volume. For CSI plugin, it appends plugin driver name at the end of
+// plugin name, e.g. kubernetes.io/csi:csi-hostpath. It helps to distinguish
+// between metrics emitted for CSI volumes which may be handled by different
+// CSI plugin drivers.
+func GetFullQualifiedPluginNameForVolume(pluginName string, spec *volume.Spec) string {
+	if spec != nil && spec.PersistentVolume != nil && spec.PersistentVolume.Spec.CSI != nil {
+		return fmt.Sprintf("%s:%s", pluginName, spec.PersistentVolume.Spec.CSI.Driver)
+	}
+	return pluginName
+}