k8s 安装 dashboard与卸载
查看版本命令：kubectl version #输出服务端和客户端的版本信息
或者docker images | grep kube
Releases · kubernetes/dashboard · GitHub 具体去这里查看对应的版本
# cd /opt
下载文件，注意版本号
# wget –tries=40 https://raw.githubusercontent.com/kubernetes/dashboard/v2.5.1/aio/deploy/recommended.yaml
将文件名recommended.yaml变更为kubernetes-dashboard-2.5.1.yaml
创建pod
# kubectl apply -f kubernetes-dashboard-2.5.1.yaml
查看创建成功，查看所有po
# kubectl get po --all-namespaces
查看现有的所有服务
# kubectl get svc --all-namespaces
删除现有的dashboard服务
# kubectl delete service kubernetes-dashboard --namespace=kubernetes-dashboard
# kubectl delete service dashboard-metrics-scraper --namespace=kubernetes-dashboard
删除现有的dashboard pod
# kubectl delete deployment kubernetes-dashboard --namespace=kubernetes-dashboard
# kubectl delete deployment dashboard-metrics-scraper --namespace=kubernetes-dashboard
因为Service是ClusterIP类型，为了方便使用，我们可通过kubectl --namespace=kubernetes-dashboard edit service kubernetes-dashboard修改成NodePort类型，如图所示。
kubernetes-dashboard一直ContainerCreating的解决方法
保存修改，此时已经为Service分配了端口32200，如图所示。
kubectl --namespace=kubernetes-dashboard get service kubernetes-dashboard
kubectl delete secret kubernetes-dashboard-certs -n kube-system
Kubernetes创建Dashboard超级管理员账户
vi admin-sa.yaml
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
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admin用户
# kubectl create -f admin-sa.yaml
clusterrolebinding.rbac.authorization.k8s.io/admin created
serviceaccount/admin created
查看admin用户
# kubectl get secret -n kube-system|grep admin
admin-token-npgtv kubernetes.io/service-account-token 3 82s
获取admin用户token
# kubectl describe secret -n kube-system admin-token-npgtv
kubernetes-dashboard一直ContainerCreating的解决方法
kubectl get pod -A
kubectl describe pod kubernetes-dashboard-6bd77794f-zkzh5 -n kubernetes-dashboard
原因：
node1之前反复添加过,添加之前需要清除下网络
在Node上执行如下操作：
重置kubernetes服务，重置网络。删除网络配置，link
systemctl stop kubelet
systemctl stop docker
rm -rf /var/lib/cni/
rm -rf /var/lib/kubelet/*
rm -rf /etc/cni/
ifconfig cni0 down
ifconfig flannel.1 down
ifconfig docker0 down
ip link delete cni0
ip link delete flannel.1
systemctl start docker
systemctl start kubelet
kubeadm reset
重新创建集群
kubernetes-dashboard正常运行了