基于：
辅助者
基于云提供商的自动扩展功能，与etcd对等方创建环境文件。
用法：
$> ./bin/infra-helper --help
NAME:
infra-helper - manage etcd cluster based on AWS autoscaling groups
USAGE:
infra-helper [global options] command [command options] [arguments...]
VERSION:
0.1.1
COMMANDS:
sync-etcd-peers syncs "etcd" cluster (adds/removes members based on 'autoscale' information)
list-autoscale-members
hel
