kubernetes 升级到1.18

18 client

yum install -y  \
kubeadm-1.18.0-0.x86_64 \
kubelet-1.18.0-0.x86_64 \
kubectl-1.18.0-0.x86_64

kubeadm upgrade plan

kubeadm upgrade apply v1.18.0

...
[upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.18.0". Enjoy!
[upgrade/kubelet] Now that your control plane is upgraded, please proceed with upgrading your kubelets if you haven't already done so.