kubernetes hpa cannot get cpu consumption
<p>I am trying to configure kubernetes horizontal pod autoscaling. The definition of my deployment is <a href="http://pastebin.com/bPG1hF2a" rel="nofollow">here</a>. </p>

<p>I start heapster deployment and heapster service like below:</p>

<pre><code># kubectl run heapster --namespace=kube-system --image=gcr.io/google_containers/heapster:v1.0.2 --command -- /heapster --source=kubernetes:http://192.168.122.159:8080?inClusterConfig=false --sink=log
# kubectl expose deployment heapster --port=80 --target-port=8082 --name=heapster --namespace=kube-system
</code></pre>

<p>The hpa is create like this:</p>

<pre><code># kubectl autoscale deployment nginx-rc --max=5 --cpu-percent=25
</code></pre>

<p>The heapster seems to run fine. Here are the <a href="http://pastebin.com/k2dzgnQJ" rel="nofollow">logs</a>.</p>

<p>After all this, the hpa is not receiving any data on CPU utilization. </p>

<pre><code># kubectl describe hpa
Name:               nginx-rc
Namespace:          default
Labels:             &lt;none&gt;
Annotations:            &lt;none&gt;
CreationTimestamp:      Sat, 04 Jun 2016 07:23:03 -0400
Reference:          Deployment/nginx-rc/scale
Target CPU utilization:     25%
Current CPU utilization:    &lt;unset&gt;
Min replicas:           1
Max replicas:           5
Events:
  FirstSeen LastSeen    Count   From                SubobjectPath   Type        Reason          Message
  --------- --------    -----   ----                -------------   --------    ------          -------
  9m        7s      22  {horizontal-pod-autoscaler }            Warning     FailedGetMetrics    failed to get CPU consumption and request: metrics obtained for 0/1 of pods
  9m        7s      22  {horizontal-pod-autoscaler }            Warning     FailedComputeReplicas   failed to get CPU utilization: failed to get CPU consumption and request: metrics obtained for 0/1 of pods
</code></pre>

<p>Controller manager logs have a recurring line:</p>

<pre><code>Jun 04 07:21:33 master kube-controller-manager[8202]: W0604 07:21:33.079677    8202 horizontal.go:108] Failed to reconcile nginx-rc: failed to compute desired number of replicas based on CPU utilization for Deployment/default/nginx-rc: failed to get CPU utilization: failed to get CPU consumption and request: metrics obtained for 0/1 of pods
</code></pre>

<p>Can someone point out the nature of the problem here?</p>