volume scheduling: move metrics to a separate package to avoid import cycle

pkg/controller/volume/scheduling/BUILD

@@ -4,7 +4,6 @@ go_library(
     name = "go_default_library",
     srcs = [
         "scheduler_assume_cache.go",
-        "scheduler_bind_cache_metrics.go",
         "scheduler_binder.go",
         "scheduler_binder_cache.go",
         "scheduler_binder_fake.go",
@@ -14,6 +13,7 @@ go_library(
     deps = [
         "//pkg/apis/core/v1/helper:go_default_library",
         "//pkg/controller/volume/persistentvolume/util:go_default_library",
+        "//pkg/controller/volume/scheduling/metrics:go_default_library",
         "//pkg/volume/util:go_default_library",
         "//staging/src/k8s.io/api/core/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/api/meta:go_default_library",
@@ -26,9 +26,6 @@ go_library(
         "//staging/src/k8s.io/client-go/kubernetes:go_default_library",
         "//staging/src/k8s.io/client-go/listers/storage/v1:go_default_library",
         "//staging/src/k8s.io/client-go/tools/cache: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",
     ],
 )
@@ -72,7 +69,10 @@ filegroup(
 
 filegroup(
     name = "all-srcs",
-    srcs = [":package-srcs"],
+    srcs = [
+        ":package-srcs",
+        "//pkg/controller/volume/scheduling/metrics:all-srcs",
+    ],
     tags = ["automanaged"],
     visibility = ["//visibility:public"],
 )

pkg/controller/volume/scheduling/metrics/BUILD

@@ -0,0 +1,27 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["metrics.go"],
+    importpath = "k8s.io/kubernetes/pkg/controller/volume/scheduling/metrics",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//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",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

pkg/controller/volume/scheduling/scheduler_bind_cache_metrics.go → pkg/controller/volume/scheduling/metrics/metrics.go

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package scheduling
+package metrics
 
 import (
 	"github.com/prometheus/client_golang/prometheus"

pkg/controller/volume/scheduling/scheduler_binder.go

@@ -33,6 +33,7 @@ import (
 	"k8s.io/klog"
 	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
 	pvutil "k8s.io/kubernetes/pkg/controller/volume/persistentvolume/util"
+	"k8s.io/kubernetes/pkg/controller/volume/scheduling/metrics"
 	volumeutil "k8s.io/kubernetes/pkg/volume/util"
 )
 
@@ -154,9 +155,9 @@ func (b *volumeBinder) FindPodVolumes(pod *v1.Pod, node *v1.Node) (unboundVolume
 	boundVolumesSatisfied = true
 	start := time.Now()
 	defer func() {
-		VolumeSchedulingStageLatency.WithLabelValues("predicate").Observe(time.Since(start).Seconds())
+		metrics.VolumeSchedulingStageLatency.WithLabelValues("predicate").Observe(time.Since(start).Seconds())
 		if err != nil {
-			VolumeSchedulingStageFailed.WithLabelValues("predicate").Inc()
+			metrics.VolumeSchedulingStageFailed.WithLabelValues("predicate").Inc()
 		}
 	}()
 
@@ -256,9 +257,9 @@ func (b *volumeBinder) AssumePodVolumes(assumedPod *v1.Pod, nodeName string) (al
 	klog.V(4).Infof("AssumePodVolumes for pod %q, node %q", podName, nodeName)
 	start := time.Now()
 	defer func() {
-		VolumeSchedulingStageLatency.WithLabelValues("assume").Observe(time.Since(start).Seconds())
+		metrics.VolumeSchedulingStageLatency.WithLabelValues("assume").Observe(time.Since(start).Seconds())
 		if err != nil {
-			VolumeSchedulingStageFailed.WithLabelValues("assume").Inc()
+			metrics.VolumeSchedulingStageFailed.WithLabelValues("assume").Inc()
 		}
 	}()
 
@@ -332,9 +333,9 @@ func (b *volumeBinder) BindPodVolumes(assumedPod *v1.Pod) (err error) {
 
 	start := time.Now()
 	defer func() {
-		VolumeSchedulingStageLatency.WithLabelValues("bind").Observe(time.Since(start).Seconds())
+		metrics.VolumeSchedulingStageLatency.WithLabelValues("bind").Observe(time.Since(start).Seconds())
 		if err != nil {
-			VolumeSchedulingStageFailed.WithLabelValues("bind").Inc()
+			metrics.VolumeSchedulingStageFailed.WithLabelValues("bind").Inc()
 		}
 	}()
 

pkg/controller/volume/scheduling/scheduler_binder_cache.go

@@ -19,7 +19,8 @@ package scheduling
 import (
 	"sync"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/kubernetes/pkg/controller/volume/scheduling/metrics"
 )
 
 // PodBindingCache stores PV binding decisions per pod per node.
@@ -93,7 +94,7 @@ func (c *podBindingCache) DeleteBindings(pod *v1.Pod) {
 
 	if _, ok := c.bindingDecisions[podName]; ok {
 		delete(c.bindingDecisions, podName)
-		VolumeBindingRequestSchedulerBinderCache.WithLabelValues("delete").Inc()
+		metrics.VolumeBindingRequestSchedulerBinderCache.WithLabelValues("delete").Inc()
 	}
 }
 
@@ -113,7 +114,7 @@ func (c *podBindingCache) UpdateBindings(pod *v1.Pod, node string, bindings []*b
 			bindings:      bindings,
 			provisionings: pvcs,
 		}
-		VolumeBindingRequestSchedulerBinderCache.WithLabelValues("add").Inc()
+		metrics.VolumeBindingRequestSchedulerBinderCache.WithLabelValues("add").Inc()
 	} else {
 		decision.bindings = bindings
 		decision.provisionings = pvcs

pkg/scheduler/metrics/BUILD

@@ -10,7 +10,7 @@ go_library(
     ],
     importpath = "k8s.io/kubernetes/pkg/scheduler/metrics",
     deps = [
-        "//pkg/controller/volume/scheduling:go_default_library",
+        "//pkg/controller/volume/scheduling/metrics: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",

pkg/scheduler/metrics/metrics.go

@@ -24,7 +24,7 @@ import (
 
 	"k8s.io/component-base/metrics"
 	"k8s.io/component-base/metrics/legacyregistry"
-	volumescheduling "k8s.io/kubernetes/pkg/controller/volume/scheduling"
+	volumeschedulingmetrics "k8s.io/kubernetes/pkg/controller/volume/scheduling/metrics"
 )
 
 const (
@@ -251,7 +251,7 @@ func Register() {
 		for _, metric := range metricsList {
 			legacyregistry.MustRegister(metric)
 		}
-		volumescheduling.RegisterVolumeSchedulingMetrics()
+		volumeschedulingmetrics.RegisterVolumeSchedulingMetrics()
 	})
 }