Kubernetes Dashboard的安装与配置

一 背景

通过kubeadm快速完成了kubernetes的安装，即可迅速地体验到kubernetes的强大功能。美中不足的是，只能通过命令来查看或操作，没有一个直观且简洁的Web UI来感受一下这种成功的喜悦。此外，国内的网络环境，也在某种程度上增加了一些门槛。面对如此种种，依然有办法体验kunernetes dashboard。

二 操作步骤

因为不清楚Pod会被调度到哪一个Node上，所以在每一个节点上执行以下脚本：

#!/bin/bash docker pull registry.cn-qingdao.aliyuncs.com/wangxiaoke/kubernetes-dashboard-amd64:v1.10.0 # docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.10.0 docker tag registry.cn-qingdao.aliyuncs.com/wangxiaoke/kubernetes-dashboard-amd64:v1.10.0 k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.0 docker image rm registry.cn-qingdao.aliyuncs.com/wangxiaoke/kubernetes-dashboard-amd64:v1.10.0

在Master节点上执行：

[root@k8s-m ~]# curl -O kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.0/src/deploy/recommended/kubernetes-dashboard.yaml [root@k8s-m ~]# kubectl apply -f kubernetes-dashboard.yaml

查看pod是否创建成功:

[root@k8s-m ~]# kubectl get pods --namespace=kube-system NAME READY STATUS RESTARTS AGE coredns-576cbf47c7-xg4xm 1/1 Running 1 72m coredns-576cbf47c7-xq9mc 1/1 Running 1 80m etcd-k8s-m 1/1 Running 2 79m kube-apiserver-k8s-m 1/1 Running 2 79m kube-controller-manager-k8s-m 1/1 Running 21 80m kube-flannel-ds-amd64-9fzm7 1/1 Running 1 72m kube-flannel-ds-amd64-nddqf 1/1 Running 2 72m kube-proxy-6js29 1/1 Running 2 80m kube-proxy-lp2v2 1/1 Running 2 72m kube-scheduler-k8s-m 1/1 Running 19 80m kubernetes-dashboard-77fd78f978-ngkvb 1/1 Running 1 25m

修改service配置，找到type，将ClusterIP改成NodePort：

[root@k8s-m ~]# kubectl edit service kubernetes-dashboard --namespace=kube-system

查看暴露端口:

[root@k8s-m ~]# kubectl get service --namespace=kube-system NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP 87m kubernetes-dashboard NodePort 10.101.204.129 <none> 443:31269/TCP 32m

创建kubernetes-dashboard用户:

kind: ClusterRoleBinding apiVersion: rbac.authorization.k8s.io/v1beta1 metadata: name: admin annotations: rbac.authorization.kubernetes.io/autoupdate: "true" roleRef: kind: ClusterRole name: cluster-admin apiGroup: rbac.authorization.k8s.io subjects: - kind: ServiceAccount name: admin namespace: kube-system --- apiVersion: v1 kind: ServiceAccount metadata: name: admin namespace: kube-system labels: kubernetes.io/cluster-service: "true" addonmanager.kubernetes.io/mode: Reconcile

创建用户:

[root@k8s-m ~]# kubectl create -f admin-token.yaml 

获取登录token:

[root@k8s-m ~]# kubectl get secret -n kube-system |grep admin|awk '{print $1}' admin-token-6tkxm [root@k8s-m ~]# kubectl describe secret admin-token-6tkxm -n kube-system|grep '^token'|awk '{print $2}' eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi10b2tlbi02dGt4bSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50Lm5hbWUiOiJhZG1pbiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6IjQ4MjcxNTE5LTFkODgtMTFlOS1iMGZkLTAwMTU1ZDc0ZWUyNyIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlLXN5c3RlbTphZG1pbiJ9.TpBGEd-7VXrYjN_5fi0sOXMqLIrhDkgqIVVTagO4wvKOQloCJkpfvnVgBJ0Oi52-UQNBKBVH8v1wRBltPHKrjMqVU9re6-y3nd4UbwWtIZzmfMJ_oRwo2ne_UdU_Ya2I5EOH3qh1cUIhdG3NpZYXwFICsNZURJWZM_U7OqJrZPuMXw4sfD6iGRWeMtOiAI8YN1LAfpj1RHaeOa66DK_LEsSLBsb2W6m7wrugk7SBCJSkMyec7ZVGLHo5Ha-X5wNO5qAAKzud0lz2KVcvwJW8lkcc9_lPxPIoDIpdCFEoG5xZHr0B2PkatCS8f31VQzP6LAmvkmHxbENb6V3Ov90RGw

将以上内容复制备用。

三 查看结果

3.1 打开浏览器输入访问地址:https://NodeIP:PORT>。此处输入Node-2的访问地址：，其他节点亦如此。如下图：

3.2 认证方式选择口令，输入刚才获取到的token，即可登陆成功。

3.3 登录成功后，如下图：

四 总结

4.1 这是一个简单而快乐的过程，只要动手去做，其实很简单的！

4.2 这次实验是部署在kubernetes v1.12.1的。

4.3 实验使用的浏览器是Firefox v64.0.2，其他浏览器可能不支持。