kubeadm升级k8s到v1.20.8
yum install -y kubeadm-1.20.8-0.x86_64 kubelet-1.20.8-0.x86_64 kubectl-1.20.8-0.x86_64
kubeadm upgrade apply v1.20.8
systemctl daemon-reload
yum install -y kubeadm-1.20.8-0.x86_64 kubelet-1.20.8-0.x86_64 kubectl-1.20.8-0.x86_64
kubeadm upgrade apply v1.20.8
systemctl daemon-reload