How to configure Nginx as load balancing that are running apache(port 80) on same host(host1).
Proxy is between nginx:80 and apache:8000.
Load balance is between host-1 and host2/3 with same weight.
Overview is as follows;

<Internet>-----< host-1> -------<proxy>--------<load barance>
>>>>>>>>>Nginx:80<--->Apace:8000 <--->host-2 :weight 5 :80;,host-3 :weight 5 :80;


Need a little more description for http://wiki.nginx.org/LikeApache
Explaining of configure on Virtual Host in Apache could be helpful.

with regards;

Filially, I found a solution.

Incomplete installation proceeded by yum caused problem of missing few modules.
Follow the instruction directed on Nginx Web page(said, compile-time options) resulted as good.

http://wiki.nginx.org/Install
Building Nginx From Source

Everybody, please be sure to follow the instruction.


Shiro