kubeadmi 的 Kubernetes 集群中安装 Flannel
kubeadm For information on deploying flannel manually, using the Kubernetes installer toolkit kubeadm, see Installing Kubernetes on Linux with kubeadm.
NOTE: If kubeadm is used, then pass --pod-network-cidr=10.244.0.0/16 to kubeadm init to ensure that the podCIDR is set.
参考
https://github.com/flannel-io/flannel/blob/master/Documentation/kubernetes.md