k8s版本升级

#master：
 yum install kubeadm-1.16.1 kubectl-1.16.1 -y
kubeadm upgrade plan
kubeadm upgrade apply v1.16.1
yum install kubelet-1.16.1 -y 
systemctl daemon-reload 
systemctl restart kubelet.service

#node：
yum install kubelet-1.16.1 -y 
systemctl daemon-reload 
systemctl restart kubelet.service