在master0上生成kubeadm-config.yaml配置文件

[fanux]

apiVersion: kubeadm.k8s.io/v1beta1
kind: ClusterConfiguration
kubernetesVersion: v1.14.0
controlPlaneEndpoint: "apiserver.cluster.local:6443" # apiserver DNS name
apiServer:
        certSANs:
        - 127.0.0.1
        - apiserver.cluster.local
        - 172.20.241.205
        - 172.20.241.206
        - 172.20.241.207
        - 172.20.241.208
        - 10.103.97.1          # virturl ip
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
mode: "ipvs"
ipvs:
        excludeCIDRs: 
        - "10.103.97.1/32"

把所有master地址渲染进去，写到/root/kubeadm-config.yaml文件

[fanux]

如果文件已存在就不渲染，渲染使用 text/template 注意虚拟地址要和代码里写死的一致. 10.103.97.2