Kubernetets 安装 Dashboard

Dashboard 安装与使用

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文章目录
Dashboard 安装与使用
一、What is Dashboard ？
二、Kubernetes Dashboard 安装
1、通过官方模板创建dashboard容器
2、查看创建的容器状态
3、修改dashboard的service端口暴露模式为NodePort
4、创建Service Account 及 ClusterRoleBinding

三、获取访问 Kubernetes Dashboard所需的 Token
1、token获取方式
2、kubeConfig生成方式

四、访问DashBoard UI
粘贴获取的token

一、What is Dashboard ？

Kubernetes Dashboard是Kubernetes集群的Web UI，用户可以通过Dashboard进行管理集群内所有资源对象，例如查看资源对象的运行情况，部署新的资源对象，伸缩Deployment中的Pod数量等等一系列操作。

二、Kubernetes Dashboard 安装 1、通过官方模板创建dashboard容器

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

2、查看创建的容器状态

$ kubectl get deployment -n kuberenetes-dashboard
$ kubectl get pods -n kuberenetes-dashboard

3、修改dashboard的service端口暴露模式为NodePort

$ kubectl edit service kubernetes-dashboard -n kubernetes-dashboard

[root@k8s-master dashboard]# kubectl edit service kubernetes-dashboard -n kubernetes-dashboard

# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: Service
metadata:
  annotations:
  # 添加暴露的端口
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"k8s-app":"kubernetes-dashboard"},"name":"kubernetes-dashboard","namespace":"kubernetes-dashboard"},"spec":{"ports":[{"nodePort":30009,"port":443,"targetPort":8443}],"selector":{"k8s-app":"kubernetes-dashboard"},"type":"NodePort"}}
  creationTimestamp: "2022-05-10T06:51:23Z"
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
  resourceVersion: "22566"
  uid: 592e0ac4-c79e-4afe-a340-58f6450173d9
spec:
  clusterIP: 10.1.214.46
  clusterIPs:
  - 10.1.214.46
  externalTrafficPolicy: Cluster
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  ports:
  # 添加暴露的端口
  - nodePort: 30009
    port: 443
    protocol: TCP
    targetPort: 8443
  selector:
    k8s-app: kubernetes-dashboard
  sessionAffinity: None
  # 修改模式
  type: NodePort
status:
  loadBalancer: {}

4、创建Service Account 及 ClusterRoleBinding

# 创建一个yaml文件管理目录
$ mkdir -p /root/k8s/dashboard && cd /root/k8s/dashboard 
# 编写auth.yaml文件
$ cat << EOF >> auth.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kubernetes-dashboard
---
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
 
 # 创建服务 
 $ kubectl apply -f auth.yaml

三、获取访问 Kubernetes Dashboard所需的 Token 1、token获取方式

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

2、kubeConfig生成方式

# 获取token文件名
$ TOKEN_FILE=$(kubectl -n kubernetes-dashboard get secret | awk '/admin-user/{print $1}')
# 获取token
$ DASH_TOCKEN=$(kubectl -n kubernetes-dashboard get secrets $TOKEN_FILE -n kubernetes-dashboard -o jsonpath={.data.token} |base64 -d)
# 设置 kubeconfig 文件中的一个集群条目
$ kubectl config set-cluster kubernetes --server=192.168.3.90:30009 --kubeconfig=/usr/local/src/dashbord-admin.conf
# 设置 kubeconfig 文件中的一个用户条目
$ kubectl config set-credentials kubernetes-dashboard --token=$DASH_TOCKEN --kubeconfig=/usr/local/src/dashbord-admin.conf
# 设置 kubeconfig 文件中的一个上下文条目
$ kubectl config set-context kubernetes-dashboard@kubernetes --cluster=kubernetes --user=kubernetes-dashboard --kubeconfig=/usr/local/src/dashbord-admin.conf
# 设置 kubeconfig 文件中的当前上下文
$ kubectl config use-context kubernetes-dashboard@kubernetes --kubeconfig=/usr/local/src/dashbord-admin.conf
# 生成的kubeConfig文件路径
/usr/local/src

四、访问DashBoard UI

# 防火墙放行端口
$ firewall-cmd --zone=public --add-port=30009/tcp --permanent
# 或者直接关闭防火墙(不建议)
$ systemctl stop firewalld.service

# 测试
# IP为自己服务器地址，端口为修改dashboard的service暴露的端口
$ curl http://192.168.3.90:30009
# 浏览器访问
http://192.168.3.90:30009

粘贴获取的token

参考文章：Kubernetes Dashboard 安装与使用-阿里云开发者社区 (aliyun.com)

Kubernetets 安装 Dashboard

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