▍1. conf20190710
基于OpenResty,使用lua脚本+redis,来扩展nginx功能,实现的灰度策略有:配置ip白名单、流量控制、过滤请求头header。(Based on OpenResty, the function of nginx is extended by using Lua script + redis. The gray level strategies are: configuring IP whitelist, traffic control, filtering request header)