升级:
查看kubeadm支持版本
yum list --showduplicates kubeadm --disableexcludes=kubernetes
安装新的kubeadm
yum install -y kubeadm-1.19.3 kubelet-1.19.3 --disableexcludes=kubernetes
检测
kubeadm upgrade plan
查看镜像
kubeadm config images list
拉取镜像
kubeadm config images pull #最好提前拉取
升级
kubeadm upgrade apply v1.19.3
重启kubelet
systemctl daemon-reload
systemctl restart kubelet
kubectl get nodes
kubectl get pod --all-namespaces -o wide
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