部署 Dashboard

  • K8s 官方有一个项目叫 dashboard,通过这个项目更方便监控集群的状态

  • 官方地址: https://github.com/kubernetes/dashboard

  • 通常我们通过命令行 $ kubectl get po -n kube-system

  • 能够查看到集群所有的组件,但这样的方式比较不太直观

  • 要查看集群有哪些pod,用户,命名空间等,比较麻烦

  • 所以 K8s 提供了一个dashboard UI界面来供运维人员使用

  • $ wget -O kubernetes-dashboard.yaml https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml

    • 这是下载 kubernetes-dashboard.yaml 文件
  • 之后,对该文件稍作修改

    kind: Service
    apiVersion: v1
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      name: kubernetes-dashboard
      namespace: kubernetes-dashboard
    spec:
      ports:
        - port: 443
          targetPort: 8443
      selector:
        k8s-app: kubernetes-dashboard
    
    • 修改成 如下
    kind: Service
    apiVersion: v1
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      name: kubernetes-dashboard
      namespace: kubernetes-dashboard
    spec:
      type: NodePort # 加上这个
      ports:
        - port: 443
          targetPort: 8443
          nodePort: 31111 # 加上这个,自定义
      selector:
        k8s-app: kubernetes-dashboard
    
  • $ kubectl create -f kubernetes-dashboard.yaml 部署 dashboard

    namespace/kubernetes-dashboard created
    serviceaccount/kubernetes-dashboard created
    service/kubernetes-dashboard created
    secret/kubernetes-dashboard-certs created
    secret/kubernetes-dashboard-csrf created
    secret/kubernetes-dashboard-key-holder created
    configmap/kubernetes-dashboard-settings created
    role.rbac.authorization.k8s.io/kubernetes-dashboard created
    clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
    rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
    clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
    deployment.apps/kubernetes-dashboard created
    service/dashboard-metrics-scraper created
    deployment.apps/dashboard-metrics-scraper created
    
  • $ kubectl get svc -n kubernetes-dashboard 查看命名空间中的服务

    NAME                        TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)         AGE
    dashboard-metrics-scraper   ClusterIP   10.1.212.7     <none>        8000/TCP        27s
    kubernetes-dashboard        NodePort    10.1.117.149   <none>        443:31111/TCP   27s
    
    • 上面看到是 443对应的 31111 端口,所以需要用 https 来访问
    • 这里 work node 配置的 hosts 有 node1.k8s 和 node2.k8s 两台,外部mac也同样配置这样的hosts,随便选择一台
    • 在Mac浏览器(客户端) 上访问: https://node1.k8s:31111 它会跳转到登录页面,它会要求输入 Token
  • 获取 token: $ kubectl -n kube-system describe $(kubectl -n kube-system get secret -n kube-system -o name | grep namespace) | grep token
    Name:         namespace-controller-token-t2cl5
    Type:  kubernetes.io/service-account-token
    token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IkhrSTdHaTdfaFgxaERORGtTODdOOHpQdlRnejJRMjJ4MWRuX2pybEZLcTQifQ.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.dF9xW6gAtEUbgRxgzCBWPLZ8IzGgyBGH46yvW5csf5dfvPLqDFldjzELDvIbG-tzAV3g539e16X9nM3TpWgoDF17M-mOToodZgqoVg9UjGz-NhNNUUSVX_IO9oZPS1ptHN_nbHUUn8W4NuUnMVS_rGjBj4PpNQfitUdwIBXcAbziESx4f2ZUpoBjnNXggCfmpFVqSeo4pSGANPohjB9d_STFPgiU_EpTflxTjq6okpjh2DX1yc16LoZGrvj2CScbHvkw5XXkfhoquqQ0Zp24bG_4wYcTVUwl9rgHhfgnFNWPMZN0yqC1FDUqjshqoBO4A8bOFAK5xhAZegZY-KxaQQ
    
  • 将上述token粘贴进入,点击 登录 按钮,进入如下界面
  • 可以看到里面有一个 web 的 pod, 同时,我们用命令获取 $ kubectl get po 也是同步的结果
    NAME                   READY   STATUS    RESTARTS   AGE
    web-6db77f5fdb-65wfv   1/1     Running   0          157m
    
  • 其他命令也是一样, 这个dashboard界面现在已经搭建完成了
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