关于nginx做负载均衡时backend server取real ip

首先：

做为loadblance的nginx要添加下面的配置：

proxy_set_header        Host $host;

proxy_set_header        X-Real-IP $remote_addr;

proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

X-Real-IP和X-Forwarded-For可以2选1，也可以都打开：

更多，查看 http://blog.chinaunix.net/u/32831/showart_1908231.html

然后：

1.如果backend是apache时：apache需要添加模块rpaf

可以用于apache 2.2

Compile and Install for 1.3:

apxs -i -a -c mod_rpaf.c 

Compile and Install for 2.0:

apxs -i -c -n mod_rpaf-2.0.so mod_rpaf-2.0.c

or simply try:

make

Configuration Directives:

RPAFenable On

# Enable reverse proxy add forward

RPAFproxy_ips 127.0.0.1 10.0.0.1

# which ips are forwarding requests to us

RPAFsethostname On

# let rpaf update vhost settings 

# allows to have the same hostnames as in the "real"

# configuration for the forwarding Apache

RPAFheader X-Forwarded-For

# Allows you to change which header mod_rpaf looks

# for when trying to find the ip the that is forwarding

# our requests

# if DSO load module first: LoadModule rpaf_module libexec/apache2/mod_rpaf-2.0.so RPAFenable On RPAFsethostname On RPAFproxy_ips 192.168.1.23 （nginx loadblance server） RPAFheader X-Forwarded-For

2.如果是nginx做为backend的话：

做为backend的nginx在编译时需要添加模块

--with-http_realip_module

并修改nginx.conf：

   192.168.2.1;（该ip为nginx loadblance ip）
     X-Real-IP;

context为: http, server, location

更多，查看：