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namespace_based_enricher.go
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namespace_based_enricher.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 processors
import (
"net/url"
"time"
"github.com/golang/glog"
kube_config "k8s.io/heapster/common/kubernetes"
"k8s.io/heapster/metrics/core"
kube_api "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/client/cache"
kube_client "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/fields"
)
type NamespaceBasedEnricher struct {
store cache.Store
reflector *cache.Reflector
}
func (this *NamespaceBasedEnricher) Name() string {
return "namespace_based_enricher"
}
func (this *NamespaceBasedEnricher) Process(batch *core.DataBatch) (*core.DataBatch, error) {
for _, ms := range batch.MetricSets {
this.addNamespaceInfo(ms)
}
return batch, nil
}
// Adds UID to all namespaced elements.
func (this *NamespaceBasedEnricher) addNamespaceInfo(metricSet *core.MetricSet) {
if metricSetType, found := metricSet.Labels[core.LabelMetricSetType.Key]; found &&
(metricSetType == core.MetricSetTypePodContainer ||
metricSetType == core.MetricSetTypePod ||
metricSetType == core.MetricSetTypeNamespace) {
if namespaceName, found := metricSet.Labels[core.LabelNamespaceName.Key]; found {
nsObj, exists, err := this.store.GetByKey(namespaceName)
if exists && err == nil {
namespace, ok := nsObj.(*kube_api.Namespace)
if ok {
metricSet.Labels[core.LabelPodNamespaceUID.Key] = string(namespace.UID)
} else {
glog.Errorf("Wrong namespace store content")
}
} else {
glog.Warningf("Failed to get namespace: exist: %s error: %v", exists, err)
}
}
}
}
func NewNamespaceBasedEnricher(url *url.URL) (*NamespaceBasedEnricher, error) {
kubeConfig, err := kube_config.GetKubeClientConfig(url)
if err != nil {
return nil, err
}
kubeClient := kube_client.NewOrDie(kubeConfig)
// watch nodes
lw := cache.NewListWatchFromClient(kubeClient, "namespaces", kube_api.NamespaceAll, fields.Everything())
store := cache.NewStore(cache.MetaNamespaceKeyFunc)
reflector := cache.NewReflector(lw, &kube_api.Namespace{}, store, time.Hour)
reflector.Run()
return &NamespaceBasedEnricher{
store: store,
reflector: reflector,
}, nil
}