1. 安装zerotier

#curl -s https://install.zerotier.com | sudo bash

安装后，配置文件目录在：/var/lib/zerotier-one

1. 需要安装python, 2.7以上版本

2. 下载 letsencrypt   git clone https://github.com/letsencrypt/letsencrypt

1. 安装依赖包

[root@rpi3 ~]# yum -y install gc gcc gcc++ gcc-c++ wget make libxml2  libxml2-devel  openssl  openssl-devel  curl-devel  libjpeg-devel  libpng-devel freetype-devel bison autoconf openldap-devel pcre-devel zlib-devel