学习kubernetes——部署dashboard

　　一、安装dashboard

　　首先参考官方文档：https://kubernetes.io/docs/tasks/access-application-cluster/web-ui-dashboard/

　　官方的安装命令如下：

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml

　　当有多个节点时，安装到非主节点时，会出现一些问题。dashboard使用https去连接apiServer，由于证书问题会导致dial tcp 10.96.0.1:443: i/o timeout。

　　把recommended.yaml下载下来，修改一些配置：

　　

kind: Deployment
apiVersion: apps/v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
    spec:
　　　 # 增加nodeName，指定安装到主节点。kubernetes-node1为主节点名称
      nodeName: kubernetes-node1
      containers:
        - name: kubernetes-dashboard
          image: kubernetesui/dashboard:v2.0.0-beta8
          imagePullPolicy: Always
          ports:
            - containerPort: 8443
              protocol: TCP
          args:
            - --auto-generate-certificates
            - --namespace=kubernetes-dashboard
            # Uncomment the following line to manually specify Kubernetes API server Host
            # If not specified, Dashboard will attempt to auto discover the API server and connect
            # to it. Uncomment only if the default does not work.
            # - --apiserver-host=http://my-address:port

　　注释下面的一些配置

　　

      volumes:
        - name: kubernetes-dashboard-certs
          secret:
            secretName: kubernetes-dashboard-certs
        - name: tmp-volume
          emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      nodeSelector:
        "beta.kubernetes.io/os": linux
      # Comment the following tolerations if Dashboard must not be deployed on master
      #tolerations:
      #  - key: node-role.kubernetes.io/master
      #    effect: NoSchedule

　　

 serviceAccountName: kubernetes-dashboard
      nodeSelector:
        "beta.kubernetes.io/os": linux
      # Comment the following tolerations if Dashboard must not be deployed on master
      #tolerations:
      #  - key: node-role.kubernetes.io/master
      #    effect: NoSchedule
      volumes:

　　然后执行

　

kubectl apply -f recommended.yaml

　　会自动下载对应的镜像，如果镜像下载失败，可以去其他地方下载，然后打tag的方式，来安装

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　　执行 

　　kubectl get pods -n kubernetes-dashboard

　　下面的状态为Running表示安装成功了。

NAME                                         READY   STATUS        RESTARTS   AGE
dashboard-metrics-scraper-745bd6bb57-gf4vn   1/1     Running       0          15m
kubernetes-dashboard-7c8ff6ddc5-v8fck        1/1     Running       1          4h3m

二、创建账号

　　官方地址：https://github.com/kubernetes/dashboard/blob/master/docs/user/access-control/creating-sample-user.md

　　创建dashboard-adminuser.yaml，内容如下：

apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kubernetes-dashboard

　　创建dashboard-adminuser-role-binding.yaml，内容如下：

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kubernetes-dashboard

　　然后分别执行:

　　

kubectl apply -f dashboard-adminuser.yaml
kubectl apply -f dashboard-adminuser-role-binding.yaml

三、访问

　　创建token

　　

kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')

　　结果如下：

Name:         admin-user-token-v57nw
Namespace:    kubernetes-dashboard
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: admin-user
              kubernetes.io/service-account.uid: 0303243c-4040-4a58-8a47-849ee9ba79c1

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1066 bytes
namespace:  20 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.Z2JrQlitASVwWbc-s6deLRFVk5DWD3P_vjUFXsqVSY10pbjFLG4njoZwh8p3tLxnX_VBsr7_6bwxhWSYChp9hwxznemD5x5HLtjb16kI9Z7yFWLtohzkTwuFbqmQaMoget_nYcQBUC5fDmBHRfFvNKePh_vSSb2h_aYXa8GV5AcfPQpY7r461itme1EXHQJqv-SN-zUnguDguCTjD80pFZ_CmnSE1z9QdMHPB8hoB4V68gtswR1VLa6mSYdgPwCHauuOobojALSaMc3RH7MmFUumAgguhqAkX3Omqd3rJbYOMRuMjhANqd08piDC3aIabINX6gP5-Tuuw2svnV6NYQ

　　

　　由于证书问题，我们使用代理的方式来访问

　　在主节点执行：

　　

kubectl proxy  --address='0.0.0.0'

　　结果如下：

Starting to serve on [::]:8001

　　由于在虚拟机中，浏览器没法直接访问，添加端口映射：

　　

　　然后访问：http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/#/login

　　选择token，输入上面生成的token进行访问