github.com/jonaz/heapster@v1.3.0-beta.0.0.20170208112634-cd3c15ca3d29/metrics/processors/node_autoscaling_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  	kube_config "k8s.io/heapster/common/kubernetes"
    19  	"k8s.io/heapster/metrics/core"
    20  	"k8s.io/heapster/metrics/util"
    21  	kube_api "k8s.io/kubernetes/pkg/api"
    22  	"k8s.io/kubernetes/pkg/client/cache"
    23  	kube_client "k8s.io/kubernetes/pkg/client/unversioned"
    24  	"net/url"
    25  )
    26  
    27  type NodeAutoscalingEnricher struct {
    28  	nodeLister *cache.StoreToNodeLister
    29  	reflector  *cache.Reflector
    30  }
    31  
    32  func (this *NodeAutoscalingEnricher) Name() string {
    33  	return "node_autoscaling_enricher"
    34  }
    35  
    36  func (this *NodeAutoscalingEnricher) Process(batch *core.DataBatch) (*core.DataBatch, error) {
    37  	nodes, err := this.nodeLister.List()
    38  	if err != nil {
    39  		return nil, err
    40  	}
    41  	for _, node := range nodes.Items {
    42  		if metricSet, found := batch.MetricSets[core.NodeKey(node.Name)]; found {
    43  			metricSet.Labels[core.LabelLabels.Key] = util.LabelsToString(node.Labels)
    44  			capacityCpu, _ := node.Status.Capacity[kube_api.ResourceCPU]
    45  			capacityMem, _ := node.Status.Capacity[kube_api.ResourceMemory]
    46  			allocatableCpu, _ := node.Status.Allocatable[kube_api.ResourceCPU]
    47  			allocatableMem, _ := node.Status.Allocatable[kube_api.ResourceMemory]
    48  
    49  			cpuRequested := getInt(metricSet, &core.MetricCpuRequest)
    50  			cpuUsed := getInt(metricSet, &core.MetricCpuUsageRate)
    51  			memRequested := getInt(metricSet, &core.MetricMemoryRequest)
    52  			memUsed := getInt(metricSet, &core.MetricMemoryUsage)
    53  
    54  			if allocatableCpu.MilliValue() != 0 {
    55  				setFloat(metricSet, &core.MetricNodeCpuUtilization, float32(cpuUsed)/float32(allocatableCpu.MilliValue()))
    56  				setFloat(metricSet, &core.MetricNodeCpuReservation, float32(cpuRequested)/float32(allocatableCpu.MilliValue()))
    57  			}
    58  			setFloat(metricSet, &core.MetricNodeCpuCapacity, float32(capacityCpu.MilliValue()))
    59  			setFloat(metricSet, &core.MetricNodeCpuAllocatable, float32(allocatableCpu.MilliValue()))
    60  
    61  			if allocatableMem.Value() != 0 {
    62  				setFloat(metricSet, &core.MetricNodeMemoryUtilization, float32(memUsed)/float32(allocatableMem.Value()))
    63  				setFloat(metricSet, &core.MetricNodeMemoryReservation, float32(memRequested)/float32(allocatableMem.Value()))
    64  			}
    65  			setFloat(metricSet, &core.MetricNodeMemoryCapacity, float32(capacityMem.Value()))
    66  			setFloat(metricSet, &core.MetricNodeMemoryAllocatable, float32(allocatableMem.Value()))
    67  		}
    68  	}
    69  	return batch, nil
    70  }
    71  
    72  func getInt(metricSet *core.MetricSet, metric *core.Metric) int64 {
    73  	if value, found := metricSet.MetricValues[metric.MetricDescriptor.Name]; found {
    74  		return value.IntValue
    75  	}
    76  	return 0
    77  }
    78  
    79  func setFloat(metricSet *core.MetricSet, metric *core.Metric, value float32) {
    80  	metricSet.MetricValues[metric.MetricDescriptor.Name] = core.MetricValue{
    81  		MetricType: core.MetricGauge,
    82  		ValueType:  core.ValueFloat,
    83  		FloatValue: value,
    84  	}
    85  }
    86  
    87  func NewNodeAutoscalingEnricher(url *url.URL) (*NodeAutoscalingEnricher, error) {
    88  	kubeConfig, err := kube_config.GetKubeClientConfig(url)
    89  	if err != nil {
    90  		return nil, err
    91  	}
    92  	kubeClient := kube_client.NewOrDie(kubeConfig)
    93  
    94  	// watch nodes
    95  	nodeLister, reflector, _ := util.GetNodeLister(kubeClient)
    96  
    97  	return &NodeAutoscalingEnricher{
    98  		nodeLister: nodeLister,
    99  		reflector:  reflector,
   100  	}, nil
   101  }