github.com/galamsiva2020/kubernetes-heapster-monitoring@v0.0.0-20210823134957-3c1baa7c1e70/metrics/processors/namespace_aggregator.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  	"github.com/golang/glog"
    19  	"k8s.io/heapster/metrics/core"
    20  )
    21  
    22  type NamespaceAggregator struct {
    23  	MetricsToAggregate []string
    24  }
    25  
    26  func (this *NamespaceAggregator) Name() string {
    27  	return "namespace_aggregator"
    28  }
    29  
    30  func (this *NamespaceAggregator) Process(batch *core.DataBatch) (*core.DataBatch, error) {
    31  	namespaces := make(map[string]*core.MetricSet)
    32  	for key, metricSet := range batch.MetricSets {
    33  		if metricSetType, found := metricSet.Labels[core.LabelMetricSetType.Key]; !found || metricSetType != core.MetricSetTypePod {
    34  			continue
    35  		}
    36  
    37  		namespaceName, found := metricSet.Labels[core.LabelNamespaceName.Key]
    38  		if !found {
    39  			glog.Errorf("No namespace info in pod %s: %v", key, metricSet.Labels)
    40  			continue
    41  		}
    42  
    43  		namespaceKey := core.NamespaceKey(namespaceName)
    44  		namespace, found := namespaces[namespaceKey]
    45  		if !found {
    46  			if nsFromBatch, found := batch.MetricSets[namespaceKey]; found {
    47  				namespace = nsFromBatch
    48  			} else {
    49  				namespace = namespaceMetricSet(namespaceName, metricSet.Labels[core.LabelPodNamespaceUID.Key])
    50  				namespaces[namespaceKey] = namespace
    51  			}
    52  		}
    53  
    54  		if err := aggregate(metricSet, namespace, this.MetricsToAggregate); err != nil {
    55  			return nil, err
    56  		}
    57  
    58  	}
    59  	for key, val := range namespaces {
    60  		batch.MetricSets[key] = val
    61  	}
    62  	return batch, nil
    63  }
    64  
    65  func namespaceMetricSet(namespaceName, uid string) *core.MetricSet {
    66  	return &core.MetricSet{
    67  		MetricValues: make(map[string]core.MetricValue),
    68  		Labels: map[string]string{
    69  			core.LabelMetricSetType.Key:   core.MetricSetTypeNamespace,
    70  			core.LabelNamespaceName.Key:   namespaceName,
    71  			core.LabelPodNamespaceUID.Key: uid,
    72  		},
    73  	}
    74  }