web集群nginx日志記錄訪問ip

centos7.5 前端使用負載均衡后，后端web日志沒有記錄來訪ip

問題：負載均衡記錄了來訪ip，web沒有記錄來訪ip

[root@lb01 conf.d]# tail -f /var/log/nginx/access.log
10.0.0.1 - - [06/May/2019:20:26:56 +0800] "GET / HTTP/1.1" 200 9 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36" "-"
[root@web01 conf.d]# tail -f /var/log/nginx/access.log
10.0.0.5 - - [06/May/2019:20:26:56 +0800] "GET / HTTP/1.1" 200 9 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36" "-"

原因：請求發送到負載之后，再由負載開一個端口發送請求給web，所以會在web中記錄負載的ip

解決方法：

[root@web01 conf.d]# vim ../nginx.conf
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';	#web的nginx日志上有這條
[root@lb01 conf.d]# vim web.lvhanzhi.com.conf 
server{
	listen 80;
	server_name web.lvhanzhi.com;
	location / {
		proxy_pass http://10.0.0.7:80;
		proxy_set_header Host $http_host;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;	#在負載均衡上寫上這個
		proxy_http_version 1.1;
	}
	location /favicon.ico{
		return 200;
		access_log off;
	}
}

查看結果:

[root@lb01 conf.d]# tail -f /var/log/nginx/access.log
10.0.0.1 - - [06/May/2019:20:53:19 +0800] "GET / HTTP/1.1" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36" "-"
[root@web01 conf.d]# tail -f /var/log/nginx/access.log
10.0.0.5 - - [06/May/2019:20:53:19 +0800] "GET / HTTP/1.1" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36" "10.0.0.1"
#可以看到web上面有訪問者的ip