cleanup of reflector metric code (finish removing unused code)

cmd/kube-apiserver/app/BUILD

@@ -29,7 +29,6 @@ go_library(
         "//pkg/registry/rbac/rest:go_default_library",
         "//pkg/serviceaccount:go_default_library",
         "//pkg/util/flag:go_default_library",
-        "//pkg/util/reflector/prometheus:go_default_library",
         "//pkg/util/workqueue/prometheus:go_default_library",
         "//pkg/version:go_default_library",
         "//pkg/version/verflag:go_default_library",

cmd/kube-apiserver/app/server.go

@@ -78,7 +78,6 @@ import (
 	rbacrest "k8s.io/kubernetes/pkg/registry/rbac/rest"
 	"k8s.io/kubernetes/pkg/serviceaccount"
 	utilflag "k8s.io/kubernetes/pkg/util/flag"
-	_ "k8s.io/kubernetes/pkg/util/reflector/prometheus" // for reflector metric registration
 	_ "k8s.io/kubernetes/pkg/util/workqueue/prometheus" // for workqueue metric registration
 	"k8s.io/kubernetes/pkg/version"
 	"k8s.io/kubernetes/pkg/version/verflag"

pkg/util/BUILD

@@ -43,7 +43,6 @@ filegroup(
         "//pkg/util/pod:all-srcs",
         "//pkg/util/procfs:all-srcs",
         "//pkg/util/prometheusclientgo:all-srcs",
-        "//pkg/util/reflector/prometheus:all-srcs",
         "//pkg/util/removeall:all-srcs",
         "//pkg/util/resizefs:all-srcs",
         "//pkg/util/resourcecontainer:all-srcs",

pkg/util/prometheusclientgo/BUILD

@@ -8,7 +8,6 @@ go_library(
     deps = [
         "//pkg/client/metrics/prometheus:go_default_library",
         "//pkg/util/prometheusclientgo/leaderelection:go_default_library",
-        "//pkg/util/reflector/prometheus:go_default_library",
         "//pkg/util/workqueue/prometheus:go_default_library",
     ],
 )

pkg/util/prometheusclientgo/adapters.go

@@ -20,6 +20,5 @@ package prometheusclientgo
 import (
 	_ "k8s.io/kubernetes/pkg/client/metrics/prometheus"              // for client metric registration
 	_ "k8s.io/kubernetes/pkg/util/prometheusclientgo/leaderelection" // for leader election metric registration
-	_ "k8s.io/kubernetes/pkg/util/reflector/prometheus"              // for reflector metric registration
 	_ "k8s.io/kubernetes/pkg/util/workqueue/prometheus"              // for workqueue metric registration
 )

pkg/util/reflector/prometheus/BUILD

@@ -1,29 +0,0 @@
-package(default_visibility = ["//visibility:public"])
-
-load(
-    "@io_bazel_rules_go//go:def.bzl",
-    "go_library",
-)
-
-go_library(
-    name = "go_default_library",
-    srcs = ["prometheus.go"],
-    importpath = "k8s.io/kubernetes/pkg/util/reflector/prometheus",
-    deps = [
-        "//staging/src/k8s.io/client-go/tools/cache: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"],
-)

pkg/util/reflector/prometheus/prometheus.go

@@ -1,126 +0,0 @@
-/*
-Copyright 2016 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 prometheus sets the cache DefaultMetricsFactory to produce
-// prometheus metrics. To use this package, you just have to import it.
-package prometheus
-
-import (
-	"k8s.io/client-go/tools/cache"
-
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-const reflectorSubsystem = "reflector"
-
-var (
-	listsTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "lists_total",
-		Help:      "Total number of API lists done by the reflectors",
-	}, []string{"name"})
-
-	listsDuration = prometheus.NewSummaryVec(prometheus.SummaryOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "list_duration_seconds",
-		Help:      "How long an API list takes to return and decode for the reflectors",
-	}, []string{"name"})
-
-	itemsPerList = prometheus.NewSummaryVec(prometheus.SummaryOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "items_per_list",
-		Help:      "How many items an API list returns to the reflectors",
-	}, []string{"name"})
-
-	watchesTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "watches_total",
-		Help:      "Total number of API watches done by the reflectors",
-	}, []string{"name"})
-
-	shortWatchesTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "short_watches_total",
-		Help:      "Total number of short API watches done by the reflectors",
-	}, []string{"name"})
-
-	watchDuration = prometheus.NewSummaryVec(prometheus.SummaryOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "watch_duration_seconds",
-		Help:      "How long an API watch takes to return and decode for the reflectors",
-	}, []string{"name"})
-
-	itemsPerWatch = prometheus.NewSummaryVec(prometheus.SummaryOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "items_per_watch",
-		Help:      "How many items an API watch returns to the reflectors",
-	}, []string{"name"})
-
-	lastResourceVersion = prometheus.NewGaugeVec(prometheus.GaugeOpts{
-		Subsystem: reflectorSubsystem,
-		Name:      "last_resource_version",
-		Help:      "Last resource version seen for the reflectors",
-	}, []string{"name"})
-)
-
-func init() {
-	prometheus.MustRegister(listsTotal)
-	prometheus.MustRegister(listsDuration)
-	prometheus.MustRegister(itemsPerList)
-	prometheus.MustRegister(watchesTotal)
-	prometheus.MustRegister(shortWatchesTotal)
-	prometheus.MustRegister(watchDuration)
-	prometheus.MustRegister(itemsPerWatch)
-	prometheus.MustRegister(lastResourceVersion)
-}
-
-type prometheusMetricsProvider struct{}
-
-func (prometheusMetricsProvider) NewListsMetric(name string) cache.CounterMetric {
-	return listsTotal.WithLabelValues(name)
-}
-
-// use summary to get averages and percentiles
-func (prometheusMetricsProvider) NewListDurationMetric(name string) cache.SummaryMetric {
-	return listsDuration.WithLabelValues(name)
-}
-
-// use summary to get averages and percentiles
-func (prometheusMetricsProvider) NewItemsInListMetric(name string) cache.SummaryMetric {
-	return itemsPerList.WithLabelValues(name)
-}
-
-func (prometheusMetricsProvider) NewWatchesMetric(name string) cache.CounterMetric {
-	return watchesTotal.WithLabelValues(name)
-}
-
-func (prometheusMetricsProvider) NewShortWatchesMetric(name string) cache.CounterMetric {
-	return shortWatchesTotal.WithLabelValues(name)
-}
-
-// use summary to get averages and percentiles
-func (prometheusMetricsProvider) NewWatchDurationMetric(name string) cache.SummaryMetric {
-	return watchDuration.WithLabelValues(name)
-}
-
-// use summary to get averages and percentiles
-func (prometheusMetricsProvider) NewItemsInWatchMetric(name string) cache.SummaryMetric {
-	return itemsPerWatch.WithLabelValues(name)
-}
-
-func (prometheusMetricsProvider) NewLastResourceVersionMetric(name string) cache.GaugeMetric {
-	return lastResourceVersion.WithLabelValues(name)
-}