nginx 流量复制

    #原接口
	upstream api{
		server 127.0.0.1:8080;
	}
	#新接口
	upstream newapi{
		server 127.0.0.1:8081;
	}
	
	#原接口后端
	location /api{
		proxy_pass http://api;
		# 后端的Web服务器可以通过X-Forwarded-For获取用户真实IP
		proxy_set_header Host $host;
		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		#流量复制
		mirror /newapi; 
		#复制请求体
		mirror_request_body on; 
	
	}
	#复制流量打入新接口
	location /newapi{
                #设置 $url ==原url
		set $url $request_uri;
		#新接口地址改变的，需要转换url
		if ( $request_uri =  /api/interfaceName1 ){
			set $url "/api/newInterface1";
		}
		#新接口地址改变的，需要转换url
		if ( $request_uri = /api/interfaceName2 ){
			set $url "/api/newInteface2";
		}
                proxy_pass http://newapi$url;
		proxy_set_header X-Original-URI $request_uri;
                proxy_set_header Host $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        }