配置Nginx反向代理负载均衡服务器

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准备：
Proxy-Server:1.1.1.22（负载均衡服务器）
Nginx-Server23:1.1.1.23（web23）
Nginx-Server24:1.1.1.24（web24）
环境版本：

Linux Nginx-Proxy 2.6.32-358.el6.x86_64 #1 SMP Fri Feb 22 00:31:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
①：安装配置完成Nginx，具体可以参考：http://note.t4x.org/system/centos-nginx-spdy/
WEB服务器预配置：

[root@Nginx-Server23 ~]# echo "1.1.1.23-server23" > /usr/local/nginx/html/index.html
[root@Nging-Server24 ~]# echo "1.1.1.24-server24" > /usr/local/nginx/html/index.html

0 1	[root@Nginx-Server23 ~]# echo "1.1.1.23-server23" > /usr/local/nginx/html/index.html [root@Nging-Server24 ~]# echo "1.1.1.24-server24" > /usr/local/nginx/html/index.html

负载均衡服务器配置：

[root@Nginx-Proxy conf]# egrep -v "#|^$" /usr/local/nginx/conf/nginx.conf
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    upstream note.t4x.org {
    server  1.1.1.23:80  weight=20;    #weight值决定分配值，对此负载服务器大约访问两次1.1.1.23，访问一次1.1.1.24
    server  1.1.1.24:80  weight=10;
    }
    server {
        listen       80;
        server_name  note.t4x.org;
        location / {
            proxy_pass         http://note.t4x.org;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}

[root@Nginx-Proxy conf]# egrep -v "#|^$" /usr/local/nginx/conf/nginx.conf

worker_processes 1;

events {

worker_connections 1024;

}

http {

include mime.types;

default_type application/octet-stream;

sendfile on;

keepalive_timeout 65;

upstream note.t4x.org {

server 1.1.1.23:80 weight=20; #weight值决定分配值，对此负载服务器大约访问两次1.1.1.23，访问一次1.1.1.24

server 1.1.1.24:80 weight=10;

}

server {

listen 80;

server_name note.t4x.org;

location / {

proxy_pass http://note.t4x.org;

}

error_page 500 502 503 504 /50x.html;

location = /50x.html {

root html;

}

备注：server 1.1.1.23:80 weight=20; 等同于 server 1.1.1.23:80 weight=20 max_fails=1 fail_timeout=10s;
测试：

[root@Nginx-Proxy conf]# curl  1.1.1.22
1.1.1.23-server23
[root@Nginx-Proxy conf]# curl  1.1.1.22
1.1.1.23-server23
[root@Nginx-Proxy conf]# curl  1.1.1.22
1.1.1.24-server24
[root@Nginx-Proxy conf]# curl  1.1.1.22
1.1.1.23-server23
[root@Nginx-Proxy conf]# curl  1.1.1.22
1.1.1.23-server23
[root@Nginx-Proxy conf]# curl  1.1.1.22
1.1.1.24-server24