Kubernetes Dashboard服务器上的错误“未知”阻止了请求的成功

如何解决Kubernetes Dashboard服务器上的错误“未知”阻止了请求的成功

启动我的k8s集群后，我忠实地部署了以下WebUI仪表板 使用命令：

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.4/aio/deploy/recommended.yaml

当我尝试访问它时，出现以下错误：

Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper)

如果获得所有服务，我将得到：

k get services --all-namespaces
NAMESPACE              NAME                        TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)         AGE
default                kubernetes                  ClusterIP   10.96.0.1     <none>        443/TCP         8d
kube-system            kube-dns                    ClusterIP   10.96.0.10    <none>        53/UDP,53/TCP   8d
kubernetes-dashboard   dashboard-metrics-scraper   ClusterIP   10.96.0.65    <none>        8000/TCP        6m10s
kubernetes-dashboard   kubernetes-dashboard        ClusterIP   10.96.0.173   <none>        443/TCP         6m10s

有人可以照亮吗？我想念什么？

更多信息： 在仪表板yaml中，我发现了以下角色：

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
rules:
  - apiGroups: [""]
    resources: ["secrets"]
    resourceNames: ["kubernetes-dashboard-key-holder","kubernetes-dashboard-certs","kubernetes-dashboard-csrf"]
    verbs: ["get","update","delete"]
   
 map.
  - apiGroups: [""]
    resources: ["configmaps"]
    resourceNames: ["kubernetes-dashboard-settings"]
    verbs: ["get","update"]
    
  - apiGroups: [""]
    resources: ["services"]
    resourceNames: ["heapster","dashboard-metrics-scraper"]
    verbs: ["proxy"]
  - apiGroups: [""]
    resources: ["services/proxy"]
    resourceNames: ["heapster","http:heapster:","https:heapster:","dashboard-metrics-scraper","http:dashboard-metrics-scraper"]
    verbs: ["get"]

    ---
    
    kind: ClusterRole
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      name: kubernetes-dashboard
    rules:
      
      - apiGroups: ["metrics.k8s.io"]
        resources: ["pods","nodes"]
        verbs: ["get","list","watch"]
    
    ---
    
    apiVersion: rbac.authorization.k8s.io/v1
    kind: RoleBinding
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      name: kubernetes-dashboard
      namespace: kubernetes-dashboard
    roleRef:
      apiGroup: rbac.authorization.k8s.io
      kind: Role
      name: kubernetes-dashboard
    subjects:
      - kind: ServiceAccount
        name: kubernetes-dashboard
        namespace: kubernetes-dashboard
    
    ---
    
    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRoleBinding
    metadata:
      name: kubernetes-dashboard
    roleRef:
      apiGroup: rbac.authorization.k8s.io
      kind: ClusterRole
      name: kubernetes-dashboard
    subjects:
      - kind: ServiceAccount
        name: kubernetes-dashboard
        namespace: kubernetes-dashboard

看起来kubernetes-dashboard用户可以访问指标服务，但我可能错了

解决方法

看起来kubernetes-dashboard的serviceaccount无法访问所有kubernetes资源（特别是它无法访问度量服务器服务）。

要解决此问题，您应该为仪表板创建一个新的ServiceAccount并为其赋予更多权限。

这是我在另一篇类似的帖子中找到的（请小心，因为它将为仪表板赋予管理员特权，并且使用它的人将能够破坏/创建您的kubernetes集群上的新资源或现有资源 >）：

   apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
   name: kubernetes-dashboard
   labels:
       k8s-app: kubernetes-dashboard
roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: ClusterRole
   name: cluster-admin
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard
  namespace: kube-system

如果您没有群集管理的ServiceAccount，请在此模板之后创建一个：

apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin
  namespace: kube-system
  labels:
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile

Admin ClusterRole：

kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: admin
rules:
  - apiGroups: ["*"]
    resources: ["*"]
    verbs: ["*"]
    nonResourceURLs: ["*"]