add metrics to gc

pkg/controller/garbagecollector/rate_limiter_helper.go

@@ -0,0 +1,59 @@
+/*
+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 garbagecollector
+
+import (
+	"fmt"
+	"strings"
+	"sync"
+
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/client/typed/dynamic"
+	"k8s.io/kubernetes/pkg/util/metrics"
+)
+
+// RegisteredRateLimiter records the registered RateLimters to avoid
+// duplication.
+type RegisteredRateLimiter struct {
+	rateLimiters map[unversioned.GroupVersion]struct{}
+	lock         sync.RWMutex
+}
+
+// NewRegisteredRateLimiter returns a new RegisteredRateLimiater.
+func NewRegisteredRateLimiter() *RegisteredRateLimiter {
+	return &RegisteredRateLimiter{
+		rateLimiters: make(map[unversioned.GroupVersion]struct{}),
+	}
+}
+
+func (r *RegisteredRateLimiter) registerIfNotPresent(gv unversioned.GroupVersion, client *dynamic.Client, prefix string) {
+	r.lock.RLock()
+	_, ok := r.rateLimiters[gv]
+	r.lock.RUnlock()
+	if ok {
+		return
+	}
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	if _, ok := r.rateLimiters[gv]; !ok {
+		if rateLimiter := client.GetRateLimiter(); rateLimiter != nil {
+			group := strings.Replace(gv.Group, ".", ":", -1)
+			metrics.RegisterMetricAndTrackRateLimiterUsage(fmt.Sprintf("%s_%s_%s", prefix, group, gv.Version), rateLimiter)
+		}
+		r.rateLimiters[gv] = struct{}{}
+	}
+}