http {
include mime.types;
default_type application/octet-stream;

#log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
#                  '$status $body_bytes_sent "$http_referer" '
#                  '"$http_user_agent" "$http_x_forwarded_for"';

#access_log  logs/access.log  main;

sendfile        on;
#tcp_nopush     on;

#keepalive_timeout  0;
keepalive_timeout  65;

#gzip  on;
upstream web{
    server 192.168.14.20:80 weight=1;
    server 192.168.14.30:80 weight=1;
}

server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;

    #access_log  logs/host.access.log  main;

    location / {
        root   html;
        index  index.html index.htm;
        proxy_pass http://web;
    }
    #error_page  404              /404.html;

主要是upstream模塊和proxy反向代理
upstream web{
server 192.168.14.20:80 weight=1;
server 192.168.14.30:80 weight=1;
}
proxy_pass http://web;