下载k8s后的解压缩目录结构:kubernetes/cluster/addons/dashboard
使用的文件:
$ ls *.yaml dashboard-controller.yaml dashboard-rbac.yaml dashboard-service.yaml 新加了 dashboard-rbac.yaml 文件,定义 dashboard 使用的 RoleBinding。由于 kube-apiserver 启用了 RBAC 授权,而官方源码目录的 dashboard-controller.yaml 没有定义授权的 ServiceAccount,所以后续访问 kube-apiserver 的 API 时会被拒绝.
解决办法是:定义一个名为 dashboard 的 ServiceAccount,然后将它和 Cluster Role view 绑定。参考下面修改的文件。
dashboard-controller.yaml
apiVersion: extensions/v1beta1 kind: Deployment metadata: name: kubernetes-dashboard namespace: kube-system labels: k8s-app: kubernetes-dashboard kubernetes.io/cluster-service: "true" addonmanager.kubernetes.io/mode: Reconcile spec: selector: matchLabels: k8s-app: kubernetes-dashboard template: metadata: labels: k8s-app: kubernetes-dashboard annotations: scheduler.alpha.kubernetes.io/critical-pod: '' spec: serviceAccountName: dashboard containers: - name: kubernetes-dashboard image: cokabug/kubernetes-dashboard-amd64:v1.6.0 resources: limits: cpu: 100m memory: 50Mi requests: cpu: 100m memory: 50Mi ports: - containerPort: 9090 livenessProbe: httpGet: path: / port: 9090 initialDelaySeconds: 30 timeoutSeconds: 30 tolerations: - key: "CriticalAddonsOnly" operator: "Exists"dashboard-service.yaml
apiVersion: v1 kind: Service metadata: name: kubernetes-dashboard namespace: kube-system labels: k8s-app: kubernetes-dashboard kubernetes.io/cluster-service: "true" addonmanager.kubernetes.io/mode: Reconcile spec: type: NodePort selector: k8s-app: kubernetes-dashboard ports: - port: 80 targetPort: 9090dashboard-rbac.yaml
apiVersion: v1 kind: ServiceAccount metadata: name: dashboard namespace: kube-system --- kind: ClusterRoleBinding apiVersion: rbac.authorization.k8s.io/v1alpha1 metadata: name: dashboard subjects: - kind: ServiceAccount name: dashboard namespace: kube-system roleRef: kind: ClusterRole name: cluster-admin apiGroup: rbac.authorization.k8s.io查看分配的 NodePort
$ kubectl get services kubernetes-dashboard -n kube-system NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes-dashboard 10.254.224.130 <nodes> 80:30312/TCP 25s NodePort 30312映射到 dashboard pod 80端口;检查 controller
$ kubectl get deployment kubernetes-dashboard -n kube-system NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE kubernetes-dashboard 1 1 1 1 3m $ kubectl get pods -n kube-system | grep dashboard kubernetes-dashboard-1339745653-pmn6z 1/1 Running 0 4m启动代理
$ kubectl proxy --address='10.501.101.41' --port=8086 --accept-hosts='^*$' Starting to serve on 10.501.101.41:8086 需要指定 --accept-hosts 选项,否则浏览器访问 dashboard 页面时提示 “Unauthorized”;浏览器访问 URL:http://10.501.101.41:8086/ui 自动跳转到:http://10.501.101.41:8086/api/v1/proxy/namespaces/kube-system/services/kubernetes-dashboard/#/workload?namespace=default
获取集群服务地址列表
$ kubectl cluster-info Kubernetes master is running at https://10.501.101.41:6443 KubeDNS is running at https://10.501.101.41:6443/api/v1/proxy/namespaces/kube-system/services/kube-dns kubernetes-dashboard is running at https://10.501.101.41:6443/api/v1/proxy/namespaces/kube-system/services/kubernetes-dashboard由于 kube-apiserver 开启了 RBAC 授权,而浏览器访问 kube-apiserver 的时候使用的是匿名证书,所以访问安全端口会导致授权失败。这里需要使用非安全端口访问 kube-apiserver:
浏览器访问 URL:http://10.501.101.41:8080/api/v1/proxy/namespaces/kube-system/services/kubernetes-dashboard
由于缺少 Heapster 插件,当前 dashboard 不能展示 Pod、Nodes 的 CPU、内存等 metric 图形;
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