vendor updates

vendor/k8s.io/kubernetes/pkg/controller/nodelifecycle/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 nodelifecycle
+
+import (
+	"sync"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const (
+	nodeControllerSubsystem = "node_collector"
+	zoneHealthStatisticKey  = "zone_health"
+	zoneSizeKey             = "zone_size"
+	zoneNoUnhealthyNodesKey = "unhealthy_nodes_in_zone"
+	evictionsNumberKey      = "evictions_number"
+)
+
+var (
+	zoneHealth = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Subsystem: nodeControllerSubsystem,
+			Name:      zoneHealthStatisticKey,
+			Help:      "Gauge measuring percentage of healthy nodes per zone.",
+		},
+		[]string{"zone"},
+	)
+	zoneSize = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Subsystem: nodeControllerSubsystem,
+			Name:      zoneSizeKey,
+			Help:      "Gauge measuring number of registered Nodes per zones.",
+		},
+		[]string{"zone"},
+	)
+	unhealthyNodes = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Subsystem: nodeControllerSubsystem,
+			Name:      zoneNoUnhealthyNodesKey,
+			Help:      "Gauge measuring number of not Ready Nodes per zones.",
+		},
+		[]string{"zone"},
+	)
+	evictionsNumber = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Subsystem: nodeControllerSubsystem,
+			Name:      evictionsNumberKey,
+			Help:      "Number of Node evictions that happened since current instance of NodeController started.",
+		},
+		[]string{"zone"},
+	)
+)
+
+var registerMetrics sync.Once
+
+// Register the metrics that are to be monitored.
+func Register() {
+	registerMetrics.Do(func() {
+		prometheus.MustRegister(zoneHealth)
+		prometheus.MustRegister(zoneSize)
+		prometheus.MustRegister(unhealthyNodes)
+		prometheus.MustRegister(evictionsNumber)
+	})
+}