按照步驟失敗後就用kubeadm reset命令重置，後來就好了

安裝Kubernetes(k8s)保姆級教程---無坑版

重置Kubernetes

https://www.jianshu.com/p/31f7dda9ccf7

重置命令

sudo kubeadm reset

結果：

W0419 09:34:58.549504    4085 removeetcdmember.go:61] [reset] failed to remove etcd member: etcdserver: re-configuration failed due to not enough started members
.Please manually remove this etcd member using etcdctl
[reset] Stopping the kubelet service
[reset] Unmounting mounted directories in "/var/lib/kubelet"
[reset] Deleting contents of config directories: [/etc/kubernetes/manifests /etc/kubernetes/pki]
[reset] Deleting files: [/etc/kubernetes/admin.conf /etc/kubernetes/kubelet.conf /etc/kubernetes/bootstrap-kubelet.conf /etc/kubernetes/controller-manager.conf /etc/kubernetes/scheduler.conf]
[reset] Deleting contents of stateful directories: [/var/lib/etcd /var/lib/kubelet /var/lib/dockershim /var/run/kubernetes /var/lib/cni]

The reset process does not clean CNI configuration. To do so, you must remove /etc/cni/net.d

The reset process does not reset or clean up iptables rules or IPVS tables.
If you wish to reset iptables, you must do so manually by using the "iptables" command.

If your cluster was setup to utilize IPVS, run ipvsadm --clear (or similar)
to reset your system's IPVS tables.

The reset process does not clean your kubeconfig files and you must remove them manually.
Please, check the contents of the $HOME/.kube/config file.
 

手工清除：

刪除net.d

rm -rf /etc/cni/net.d

重置iptables

iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X
sysctl net.bridge.bridge-nf-call-iptables=1

手動執行以下命令來清除對應的殘餘網絡卡資訊：

sudo ip link del cni0
sudo ip link del flannel.1

刪除 $HOME/.kube/config

rm -rf $HOME/.kube/config