github.com/timstclair/heapster@v0.20.0-alpha1/metrics/processors/namespace_based_enricher.go (about)

     1  // Copyright 2015 Google Inc. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package processors
    16  
    17  import (
    18  	"net/url"
    19  	"time"
    20  
    21  	"github.com/golang/glog"
    22  
    23  	kube_config "k8s.io/heapster/common/kubernetes"
    24  	"k8s.io/heapster/metrics/core"
    25  	kube_api "k8s.io/kubernetes/pkg/api"
    26  	"k8s.io/kubernetes/pkg/client/cache"
    27  	kube_client "k8s.io/kubernetes/pkg/client/unversioned"
    28  	"k8s.io/kubernetes/pkg/fields"
    29  )
    30  
    31  type NamespaceBasedEnricher struct {
    32  	store     cache.Store
    33  	reflector *cache.Reflector
    34  }
    35  
    36  func (this *NamespaceBasedEnricher) Name() string {
    37  	return "namespace_based_enricher"
    38  }
    39  
    40  func (this *NamespaceBasedEnricher) Process(batch *core.DataBatch) (*core.DataBatch, error) {
    41  	for _, ms := range batch.MetricSets {
    42  		this.addNamespaceInfo(ms)
    43  	}
    44  	return batch, nil
    45  }
    46  
    47  // Adds UID to all namespaced elements.
    48  func (this *NamespaceBasedEnricher) addNamespaceInfo(metricSet *core.MetricSet) {
    49  	if metricSetType, found := metricSet.Labels[core.LabelMetricSetType.Key]; found &&
    50  		(metricSetType == core.MetricSetTypePodContainer ||
    51  			metricSetType == core.MetricSetTypePod ||
    52  			metricSetType == core.MetricSetTypeNamespace) {
    53  
    54  		if namespaceName, found := metricSet.Labels[core.LabelNamespaceName.Key]; found {
    55  			nsObj, exists, err := this.store.GetByKey(namespaceName)
    56  			if exists && err == nil {
    57  				namespace, ok := nsObj.(*kube_api.Namespace)
    58  				if ok {
    59  					metricSet.Labels[core.LabelPodNamespaceUID.Key] = string(namespace.UID)
    60  				} else {
    61  					glog.Errorf("Wrong namespace store content")
    62  				}
    63  			} else {
    64  				glog.Warningf("Failed to get namespace: exist: %s error: %v", exists, err)
    65  			}
    66  		}
    67  	}
    68  }
    69  
    70  func NewNamespaceBasedEnricher(url *url.URL) (*NamespaceBasedEnricher, error) {
    71  	kubeConfig, err := kube_config.GetKubeClientConfig(url)
    72  	if err != nil {
    73  		return nil, err
    74  	}
    75  	kubeClient := kube_client.NewOrDie(kubeConfig)
    76  
    77  	// watch nodes
    78  	lw := cache.NewListWatchFromClient(kubeClient, "namespaces", kube_api.NamespaceAll, fields.Everything())
    79  	store := cache.NewStore(cache.MetaNamespaceKeyFunc)
    80  	reflector := cache.NewReflector(lw, &kube_api.Namespace{}, store, time.Hour)
    81  	reflector.Run()
    82  
    83  	return &NamespaceBasedEnricher{
    84  		store:     store,
    85  		reflector: reflector,
    86  	}, nil
    87  }