nginx转发获取真实客户端IP地址

两台server： 注意这里没有防火墙规则，防火墙和selinux 都是关闭状态！！


1. 192.168.10.118 做转发；
2. 192.168.10.145 是web server；



安装nginx，注意编译安装或yum安装都要加载模块 ：--with-http_realip_module ，完整的例子：


./configure --prefix=/usr --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx/nginx.pid  --lock-path=/var/lock/nginx.lock --user=nginx --group=nginx --with-http_ssl_module --with-http_flv_module --with-http_stub_status_module --with-http_gzip_static_module --http-client-body-temp-path=/var/tmp/nginx/client/ --http-proxy-temp-path=/var/tmp/nginx/proxy/ --http-fastcgi-temp-path=/var/tmp/nginx/fcgi/ --http-uwsgi-temp-path=/var/tmp/nginx/uwsgi --http-scgi-temp-path=/var/tmp/nginx/scgi --with-pcre --with-file-aio --with-http_image_filter_module --with-stream --with-http_realip_module



make -j$physical && make install


mkdir -p /var/tmp/nginx/client
mkdir -p /etc/nginx/vhosts
\cp -rf ../nginx /etc/init.d/nginx
chmod +x /etc/init.d/nginx
chkconfig --add nginx
chkconfig nginx on
/etc/init.d/nginx start
netstat -antlp |grep nginx


---------------------------------------------------


完整的目录文件结构：


[root@haproxycentos1 nginx_zf]# ls
conf  nginx  nginx.sh  work 


conf里是配置文件示例，不是必须的；nginx是启动脚本； nginx.sh 是安装脚本，运行脚本必须； work是存放依赖包的目录-也不是必须，没有的话，会去网上下载；



完整的安装脚本：


[root@haproxycentos1 nginx_zf]# cat nginx.sh 
#!/bin/sh
clear      


physical=`cat /proc/cpuinfo |grep "processor" | wc -l`
platform=`uname -i`


#nginx 编译图像处理模块及PHP需要
yum install -y gd-devel libxml2 libxml2-devel curl-devel gcc gcc-c++ make
yum -y install pam-devel openssl-devel make
groupadd -r -g 110 nginx   #添加一个nginx组为系统组
useradd -r -u 110 -g 110 nginx  #添加一个用户为系统用户  专门管理nginx


cd work
if [ ! -f pcre-8.37.tar.gz ];then
echo -e "pcre-8.37.tar.gz  [\031[32;1mnot found!\033[0m]"
exit 1
fi
tar -zxvf pcre-8.37.tar.gz
cd pcre-8.*
./configure
make -j$physical && make install
cd ..
rm -rf pcre-8.37




if [ $platform = "x86_64" ]; then
 cp /usr/local/lib/libpcre.so.1 /lib64
else
 cp /usr/local/lib/libpcre.so.1 /lib
fi






#iconv 安装
#wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz
if [ ! -f pcre-8.37.tar.gz ];then
if ! wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz;then
      echo -e "libiconv-1.14.tar.gz [\031[32;1m download fail!\033[0m]"
      exit 1
  fi
fi
tar zxvf libiconv-1.14.tar.gz
cd libiconv-1.14
./configure --prefix=/usr/local/libiconv
make -j$physical && make install
cd ..
rm -rf libiconv-1.14


if [ ! -f nginx-1.11.7.tar.gz ];then
      if ! wget http://nginx.org/download/nginx-1.11.7.tar.gz -O nginx-1.11.7.tar.gz;then
      echo -e "nginx-1.11.7.tar.gz [\031[32;1m download fail!\033[0m]"
      exit 1
  fi
fi
#编译nginx
tar zxvf nginx-1.11.7.tar.gz; 
cd nginx-1.*
./configure --prefix=/usr --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx/nginx.pid  --lock-path=/var/lock/nginx.lock --user=nginx --group=nginx --with-http_ssl_module --with-http_flv_module --with-http_stub_status_module --with-http_gzip_static_module --http-client-body-temp-path=/var/tmp/nginx/client/ --http-proxy-temp-path=/var/tmp/nginx/proxy/ --http-fastcgi-temp-path=/var/tmp/nginx/fcgi/ --http-uwsgi-temp-path=/var/tmp/nginx/uwsgi --http-scgi-temp-path=/var/tmp/nginx/scgi --with-pcre --with-file-aio --with-http_image_filter_module --with-stream --with-http_realip_module


make -j$physical && make install
cd ..
rm -rf nginx-1.11.7


mkdir -p /var/tmp/nginx/client
mkdir -p /etc/nginx/vhosts
\cp -rf ../nginx /etc/init.d/nginx
chmod +x /etc/init.d/nginx
chkconfig --add nginx
chkconfig nginx on
/etc/init.d/nginx start
netstat -antlp |grep nginx


iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT 
service iptables save
service iptables restart






nginx的启动脚本：


[root@haproxycentos1 nginx_zf]# cat nginx
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon
#
# chkconfig:   - 85 15 
# description:  Nginx is an HTTP(S) server, HTTP(S) reverse \
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /etc/nginx/nginx.conf
# config:      /etc/sysconfig/nginx
# pidfile:     /var/run/nginx.pid
 
# Source function library.
. /etc/rc.d/init.d/functions
 
# Source networking configuration.
. /etc/sysconfig/network
 
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
 
nginx="/usr/sbin/nginx"
prog=$(basename $nginx)
 
NGINX_CONF_FILE="/etc/nginx/nginx.conf"
 
[ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx
 
lockfile=/var/lock/subsys/nginx
 
make_dirs() {
   # make required directories
   user=`nginx -V 2>&1 | grep "configure arguments:" | sed 's/[^*]*--user=\([^ ]*\).*/\1/g' -`
   options=`$nginx -V 2>&1 | grep 'configure arguments:'`
   for opt in $options; do
       if [ `echo $opt | grep '.*-temp-path'` ]; then
           value=http://my.oschina.net/kcw/blog/`echo $opt | cut -d "=" -f 2`
           if [ ! -d "$value" ]; then
               # echo "creating" $value
               mkdir -p $value && chown -R $user $value
           fi
       fi
   done
}
 
start() {
    [ -x $nginx ] || exit 5
    [ -f $NGINX_CONF_FILE ] || exit 6
    make_dirs
    echo -n $"Starting $prog: "
    daemon $nginx -c $NGINX_CONF_FILE
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}
 
stop() {
    echo -n $"Stopping $prog: "
    killproc $prog -QUIT
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}
 
restart() {
    configtest || return $?
    stop
    sleep 1
    start
}
 
reload() {
    configtest || return $?
    echo -n $"Reloading $prog: "
    killproc $nginx -HUP
    RETVAL=$?
    echo
}
 
force_reload() {
    restart
}
 
configtest() {
  $nginx -t -c $NGINX_CONF_FILE
}
 
rh_status() {
    status $prog
}
 
rh_status_q() {
    rh_status >/dev/null 2>&1
}
 
case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart|configtest)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
            ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"

        exit 2