21，22 上 flanned 部署
两个运算节点都需要安装
https://github.com/coreos/flannel/releases/flannel-v0.11.0-linux-amd64.tar.gz
mkdir /opt/flannel-v0.11.0
tar xf flannel-v0.11.0-linux-amd64.tar.gz -C /opt/flannel-v0.11.0/
ln -s /opt/flannel-v0.11.0/ /opt/flannel
flannel 默认使用etcd做一些存储配置的，需要client的pem证书，是etcd 的客户端
cd /opt/flannel
mkdir cert
cd cert/
scp hdss7-200:/opt/certs/ca.pem .
scp hdss7-200:/opt/certs/client.pem .
scp hdss7-200:/opt/certs/client-key.pem .
# flanne