title: kubectl top node `error: metrics not available yet` . Using metrics-server as Heapster Depricated
body: <p>Kubernetes not able to find metric-server api.I am using Kubernetes with Docker on Mac. I was trying to do HPA from <a href="https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough/" rel="nofollow noreferrer">following example</a>. However, when I execute command <code>kubectl get hpa</code>, My target still was unknown. Then I tried, <code>kubectl describe hpa</code>. Which gave me error like below:</p>
  <pre><code>  Name:                                                  php-apache
    Namespace:                                             default
    Labels:                                                &lt;none&gt;
    Annotations:                                           &lt;none&gt;
    CreationTimestamp:                                     Sun, 07 Oct 2018 12:36:31 -0700
    Reference:                                             Deployment/php-apache
    Metrics:                                               ( current / target )
      resource cpu on pods  (as a percentage of request):  &lt;unknown&gt; / 5%
    Min replicas:                                          1
    Max replicas:                                          10
    Conditions:
      Type           Status  Reason                   Message
      ----           ------  ------                   -------
      AbleToScale    True    SucceededGetScale        the HPA controller was able to get the target's current scale
      ScalingActive  False   FailedGetResourceMetric  the HPA was unable to compute the replica count: unable to get metrics for resource cpu: no metrics returned from resource metrics API
    Events:
      Type     Reason                        Age               From                       Message
      ----     ------                        ----              ----                       -------
      Warning  FailedComputeMetricsReplicas  1h (x34 over 5h)  horizontal-pod-autoscaler  failed to get cpu utilization: unable to get metrics for resource cpu: no metrics returned from resource metrics API
      Warning  FailedGetResourceMetric       1m (x42 over 5h)  horizontal-pod-autoscaler  unable to get metrics for resource cpu: no metrics returned from resource metrics API
  </code></pre>
  <p>I am using <a href="https://github.com/kubernetes-incubator/metrics-server" rel="nofollow noreferrer">metrics-server</a> as suggested in Kubernetes documentation. I also tried doing same just using Minikube. But that also didn't work.</p>
  <p>Running <code>kubectl get --raw /apis/metrics.k8s.io/v1beta1/nodes</code> outputs :</p>
  <pre><code>{
    &quot;kind&quot;: &quot;NodeMetricsList&quot;,
    &quot;apiVersion&quot;: &quot;metrics.k8s.io/v1beta1&quot;,
    &quot;metadata&quot;: {
      &quot;selfLink&quot;: &quot;/apis/metrics.k8s.io/v1beta1/nodes&quot;
    },
    &quot;items&quot;: []
  }
  </code></pre>