问题：
The connection to the server localhost:8080 was refused - did you specify the right host or port?
切换到root用户（如果密码不对自行百度）
su root
再执行一遍
sudo kubeadm reset
sudo kubeadm init
export KUBECONFIG=/etc/kubernetes/admin.conf
sudo kubectl apply -f canal.yaml
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
网络配置随意
sudo kubectl apply -f canal.yaml
