github.com/timstclair/heapster@v0.20.0-alpha1/metrics/processors/pod_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  	"fmt"
    19  
    20  	"github.com/golang/glog"
    21  
    22  	"k8s.io/heapster/metrics/core"
    23  )
    24  
    25  var LabelsToPopulate = []core.LabelDescriptor{
    26  	core.LabelPodId,
    27  	core.LabelPodName,
    28  	core.LabelPodNamespace,
    29  	core.LabelNamespaceName,
    30  	core.LabelPodNamespaceUID,
    31  	core.LabelHostname,
    32  	core.LabelHostID,
    33  }
    34  
    35  type PodAggregator struct {
    36  }
    37  
    38  func (this *PodAggregator) Name() string {
    39  	return "pod_aggregator"
    40  }
    41  
    42  func (this *PodAggregator) Process(batch *core.DataBatch) (*core.DataBatch, error) {
    43  	result := core.DataBatch{
    44  		Timestamp:  batch.Timestamp,
    45  		MetricSets: make(map[string]*core.MetricSet),
    46  	}
    47  	for key, metricSet := range batch.MetricSets {
    48  		result.MetricSets[key] = metricSet
    49  		if metricSetType, found := metricSet.Labels[core.LabelMetricSetType.Key]; found && metricSetType == core.MetricSetTypePodContainer {
    50  			// Aggregating containers
    51  			podName, found := metricSet.Labels[core.LabelPodName.Key]
    52  			ns, found2 := metricSet.Labels[core.LabelNamespaceName.Key]
    53  			if found && found2 {
    54  				podKey := core.PodKey(ns, podName)
    55  				pod, found := result.MetricSets[podKey]
    56  				if !found {
    57  					pod, found = batch.MetricSets[podKey]
    58  					if !found {
    59  						glog.V(2).Infof("Pod not found adding %s", podKey)
    60  						pod = this.podMetricSet(metricSet.Labels)
    61  						result.MetricSets[podKey] = pod
    62  					}
    63  				}
    64  
    65  				for metricName, metricValue := range metricSet.MetricValues {
    66  					aggregatedValue, found := pod.MetricValues[metricName]
    67  					if found {
    68  						if aggregatedValue.ValueType != metricValue.ValueType {
    69  							glog.Errorf("PodAggregator: inconsistent type in %s", metricName)
    70  							continue
    71  						}
    72  
    73  						switch aggregatedValue.ValueType {
    74  						case core.ValueInt64:
    75  							aggregatedValue.IntValue += metricValue.IntValue
    76  						case core.ValueFloat:
    77  							aggregatedValue.FloatValue += metricValue.FloatValue
    78  						default:
    79  							return nil, fmt.Errorf("PodAggregator: type not supported in %s", metricName)
    80  						}
    81  					} else {
    82  						aggregatedValue = metricValue
    83  					}
    84  					pod.MetricValues[metricName] = aggregatedValue
    85  				}
    86  			} else {
    87  				glog.Errorf("No namespace and/or pod info in container %s: %v", key, metricSet.Labels)
    88  				continue
    89  			}
    90  		}
    91  	}
    92  
    93  	return &result, nil
    94  }
    95  
    96  func (this *PodAggregator) podMetricSet(labels map[string]string) *core.MetricSet {
    97  	newLabels := map[string]string{
    98  		core.LabelMetricSetType.Key: core.MetricSetTypePod,
    99  	}
   100  	for _, l := range LabelsToPopulate {
   101  		if val, ok := labels[l.Key]; ok {
   102  			newLabels[l.Key] = val
   103  		}
   104  	}
   105  	return &core.MetricSet{
   106  		MetricValues: make(map[string]core.MetricValue),
   107  		Labels:       newLabels,
   108  	}
   109  }