rebase: add controller runtime dependency

this commits add the controller runtime
and its dependency to the vendor.

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

vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/metrics/metrics.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2018 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 (
+	"github.com/prometheus/client_golang/prometheus"
+	"sigs.k8s.io/controller-runtime/pkg/metrics"
+)
+
+var (
+	// ReconcileTotal is a prometheus counter metrics which holds the total
+	// number of reconciliations per controller. It has two labels. controller label refers
+	// to the controller name and result label refers to the reconcile result i.e
+	// success, error, requeue, requeue_after
+	ReconcileTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
+		Name: "controller_runtime_reconcile_total",
+		Help: "Total number of reconciliations per controller",
+	}, []string{"controller", "result"})
+
+	// ReconcileErrors is a prometheus counter metrics which holds the total
+	// number of errors from the Reconciler
+	ReconcileErrors = prometheus.NewCounterVec(prometheus.CounterOpts{
+		Name: "controller_runtime_reconcile_errors_total",
+		Help: "Total number of reconciliation errors per controller",
+	}, []string{"controller"})
+
+	// ReconcileTime is a prometheus metric which keeps track of the duration
+	// of reconciliations
+	ReconcileTime = prometheus.NewHistogramVec(prometheus.HistogramOpts{
+		Name: "controller_runtime_reconcile_time_seconds",
+		Help: "Length of time per reconciliation per controller",
+	}, []string{"controller"})
+)
+
+func init() {
+	metrics.Registry.MustRegister(
+		ReconcileTotal,
+		ReconcileErrors,
+		ReconcileTime,
+		// expose process metrics like CPU, Memory, file descriptor usage etc.
+		prometheus.NewProcessCollector(prometheus.ProcessCollectorOpts{}),
+		// expose Go runtime metrics like GC stats, memory stats etc.
+		prometheus.NewGoCollector(),
+	)
+}