migrate controller-manager metrics to stability framework

pkg/controller/volume/attachdetach/metrics/BUILD

@@ -12,6 +12,8 @@ go_library(
         "//pkg/volume/util:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/labels:go_default_library",
         "//staging/src/k8s.io/client-go/listers/core/v1:go_default_library",
+        "//staging/src/k8s.io/component-base/metrics:go_default_library",
+        "//staging/src/k8s.io/component-base/metrics/legacyregistry:go_default_library",
         "//vendor/github.com/prometheus/client_golang/prometheus:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
     ],

pkg/controller/volume/attachdetach/metrics/metrics.go

@@ -20,8 +20,11 @@ import (
 	"sync"
 
 	"github.com/prometheus/client_golang/prometheus"
+
 	"k8s.io/apimachinery/pkg/labels"
 	corelisters "k8s.io/client-go/listers/core/v1"
+	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/legacyregistry"
 	"k8s.io/klog"
 	"k8s.io/kubernetes/pkg/controller/volume/attachdetach/cache"
 	"k8s.io/kubernetes/pkg/controller/volume/attachdetach/util"
@@ -42,10 +45,12 @@ var (
 		"Number of volumes in A/D Controller",
 		[]string{"plugin_name", "state"}, nil)
 
-	forcedDetachMetricCounter = prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Name: "attachdetach_controller_forced_detaches",
-			Help: "Number of times the A/D Controller performed a forced detach"})
+	forcedDetachMetricCounter = metrics.NewCounter(
+		&metrics.CounterOpts{
+			Name:           "attachdetach_controller_forced_detaches",
+			Help:           "Number of times the A/D Controller performed a forced detach",
+			StabilityLevel: metrics.ALPHA,
+		})
 )
 var registerMetrics sync.Once
 
@@ -57,13 +62,13 @@ func Register(pvcLister corelisters.PersistentVolumeClaimLister,
 	dsw cache.DesiredStateOfWorld,
 	pluginMgr *volume.VolumePluginMgr) {
 	registerMetrics.Do(func() {
-		prometheus.MustRegister(newAttachDetachStateCollector(pvcLister,
+		legacyregistry.RawMustRegister(newAttachDetachStateCollector(pvcLister,
 			podLister,
 			pvLister,
 			asw,
 			dsw,
 			pluginMgr))
-		prometheus.MustRegister(forcedDetachMetricCounter)
+		legacyregistry.MustRegister(forcedDetachMetricCounter)
 	})
 }