<p>I tried to demploy a k8s environment for ver1.12_rc.1.
It includes one master and 2 nodes. All of them are CentOS Linux release 7.4.1708 (Core). The related info are follows:</p>

<pre><code>[root@bogon174 dashboard]# kubectl get pods -n kube-system
NAME                                     READY   STATUS    RESTARTS   AGE
heapster-684777c4cb-fm6kd                1/1     Running   0          32m
kubernetes-dashboard-77fd78f978-khc4f    1/1     Running   0          32m
metrics-server-v0.3.1-6879897646-c7rwz   2/2     Running   0          37m
monitoring-grafana-56b668bccf-29277      1/1     Running   0          32m
monitoring-influxdb-5c5bf4949d-l8ttc     1/1     Running   0          32m

[root@bogon174 dashboard]# kubectl get services -n kube-system
NAME                   TYPE        CLUSTER-IP        EXTERNAL-IP   PORT(S)         AGE
heapster               ClusterIP   169.169.120.140   &lt;none&gt;        80/TCP          33m
kubernetes-dashboard   NodePort    169.169.151.109   &lt;none&gt;        443:26007/TCP   33m
metrics-server         NodePort    169.169.218.252   &lt;none&gt;        443:10521/TCP   38m
monitoring-grafana     ClusterIP   169.169.170.53    &lt;none&gt;        80/TCP          33m
monitoring-influxdb    ClusterIP   169.169.248.0     &lt;none&gt;        8086/TCP        33m

[root@bogon174 dashboard]# kubectl get nodes
NAME             STATUS     ROLES    AGE   VERSION
192.168.20.171   Ready      &lt;none&gt;   10d   v1.12.0-rc.1
192.168.20.172   NotReady   &lt;none&gt;   10d   v1.12.0-rc.1
</code></pre>

<p><img src="https://i.stack.imgur.com/BVxPW.png" alt="enter image description here"></p>

<p>I researched previous questions, but I cannot to get the correct solution.</p>

eric_zhang
<p>For my friends on EKS make sure you have the username set (and not set to just the session name like I did):</p>
<pre><code>robert ❱ kubectl get configmaps -n kube-system aws-auth -o yaml | grep MyTeamRole$ -A 3
- rolearn: arn:aws:iam::123546789012:role/MyTeamRole
  username: {{SessionName}}
  groups:
    - system:masters
robert ❱ kubectl top node
error: You must be logged in to the server (Unauthorized)
robert ❱ 1 ❱ kubectl edit configmap -n kube-system aws-auth
configmap/aws-auth edited
robert ❱ kubectl get configmaps -n kube-system aws-auth -o yaml | grep MyTeamRole$ -A 3
    - rolearn: arn:aws:iam::123546789012:role/MyTeamRole
      username: literally_anything:{{SessionName}}
      groups:
        - system:masters
robert ❱ kubectl top node
NAME                                       CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%
ip-10-0-3-103.us-west-2.compute.internal   341m         17%    1738Mi          52%
...
robert ❱ kubectl logs -n kube-system -l app.kubernetes.io/instance=metrics-server
E0407 22:34:45.879156       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=801591513699736721, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:34:49.399854       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=801591513699736721, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:34:50.691133       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=3949940469908359789, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:34:51.827629       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=3949940469908359789, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:39:07.288163       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=3949940469908359789, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:39:08.755492       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=801591513699736721, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:39:09.801957       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=801591513699736721, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:40:32.405458       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=801591513699736721, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:43:09.791769       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=3949940469908359789, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
E0407 22:44:14.244221       1 authentication.go:63] &quot;Unable to authenticate the request&quot; err=&quot;verifying certificate SN=3949940469908359789, SKID=, AKID= failed: x509: certificate signed by unknown authority&quot;
robert ❱
</code></pre>
