一起来学k8s 06.安装dashboard

Dashboard Install

Kubernetes Dashboard就是k8s集群的web界面，集合了所有命令行可以操作的所有命令。界面如下所示

环境

192.168.48.101 master01
192.168.48.201 node01
192.168.48.202 node02

dashboard 安装

k8s的dashboard安装可以说是非常简单，参考github的指导既可。项目地址如下

https://github.com/kubernetes/dashboard

官方安装命令

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml

但是这么安装存在几个问题：

1. 镜像国内无法直接访问，需要设置docker代理，才能下载镜像
2. dashboard的默认web证书是自动生成的，由于时间和名称存在问题，导致谷歌和ie浏览器无法打开登录界面，经过测试Firefox可以正常打开

镜像

dashboardv1.10.1镜像下载

链接：https://pan.baidu.com/s/1A4NI1guHwOFQv-n7F6ajYA 提取码：fvne

各节点无脑加载镜像

docker load -i dashboard.tar.gz

创建dashboard

[root@master01 ~]# kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml
secret/kubernetes-dashboard-certs created
serviceaccount/kubernetes-dashboard created
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
deployment.apps/kubernetes-dashboard created
service/kubernetes-dashboard created

[root@master01 ~]# kubectl get pod -n kube-system 
NAME                                    READY   STATUS    RESTARTS   AGE
coredns-fb8b8dccf-jfm2m                 1/1     Running   8          6d19h
coredns-fb8b8dccf-r8tqp                 1/1     Running   7          6d19h
etcd-master                             1/1     Running   5          6d19h
kube-apiserver-master01                   1/1     Running   5          6d19h
kube-controller-manager-master01          1/1     Running   4          6d19h
kube-flannel-ds-amd64-26xjf             1/1     Running   7          6d19h
kube-flannel-ds-amd64-82s7n             1/1     Running   3          6d19h
kube-flannel-ds-amd64-sd2j9             1/1     Running   3          6d19h
kube-proxy-792hk                        1/1     Running   5          6d19h
kube-proxy-88cgt                        1/1     Running   3          6d19h
kube-proxy-frgtq                        1/1     Running   2          6d19h
kube-scheduler-master01                   1/1     Running   4          6d19h
kubernetes-dashboard-5f7b999d65-rmxhw   1/1     Running   0          92s
[root@master ~]# 

kubernetes-dashboard service 在集群内部，无法再外部访问，为了方便访问，得暴露kubernetes-dashboard 443端口给NodePort

[root@master01 ~]# kubectl get svc -n kube-system 
NAME                   TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                  AGE
kube-dns               ClusterIP   10.96.0.10      <none>        53/UDP,53/TCP,9153/TCP   6d19h
kubernetes-dashboard   ClusterIP   10.109.71.206   <none>        443/TCP                  2m25s

[root@master01 ~]# kubectl edit svc kubernetes-dashboard  -n kube-system 

# 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:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"k8s-app":"kubernetes-dashboard"},"name":"kubernetes-dashboard","namespace":"kube-system"},"spec":{"ports":[{"port":443,"targetPort":8443}],"selector":{"k8s-app":"kubernetes-dashboard"}}}
  creationTimestamp: "2019-04-06T14:30:32Z"
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kube-system
  resourceVersion: "37052"
  selfLink: /api/v1/namespaces/kube-system/services/kubernetes-dashboard
  uid: 88d3c228-5878-11e9-8c85-000c296cdc6e
spec:
  clusterIP: 10.109.71.206
  ports:
  - port: 443
    protocol: TCP
    targetPort: 8443
  selector:
    k8s-app: kubernetes-dashboard
  sessionAffinity: None  
  type: NodePort
status:
  loadBalancer: {}
 
[root@master01 ~]# kubectl get svc -n kube-system 
NAME                   TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                  AGE
kube-dns               ClusterIP   10.96.0.10      <none>        53/UDP,53/TCP,9153/TCP   6d19h
kubernetes-dashboard   NodePort    10.109.71.206   <none>        443:30440/TCP            6m41s

通过谷歌浏览器访问，发现居然无法继续，如下图所示：