nginx+リバースプロキシでバーチャルホスト

example.com.conf

#
# A virtual host using WordPress
# /etc/nginx/conf.d/example.com.conf
#

server
{
    listen       8080;
    client_max_body_size 10m;
    server_name  .example.com;
    set $vhost_root "/home/example.com";
    root   $vhost_root;
    index  index.php index.html index.htm;

    location / {
	if (-f $request_filename)
	{
            expires 14d;
            break;
	}

        if (!-e $request_filename)
        {
            rewrite ^(.+)$  /index.php?q=$1 last;
        }
    }

    location ~ \.php$ {
        include        /etc/nginx/fastcgi_params;
        fastcgi_pass   unix:/tmp/php-fpm.sock;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $vhost_root/$fastcgi_script_name;
        fastcgi_pass_header "X-Accel-Redirect";
        fastcgi_pass_header "X-Accel-Buffering";
        fastcgi_pass_header "X-Accel-Charset";
        fastcgi_pass_header "X-Accel-Expires";
        fastcgi_pass_header "X-Accel-Limit-Rate";
    }

    location ~ /\.ht {
        deny all;
    }
}

nginx.conf

#######################################################################
#
# This is the main Nginx configuration file.  
#
# More information about the configuration options is available on 
#   * the English wiki - http://wiki.nginx.org/Main
#   * the Russian documentation - http://sysoev.ru/nginx/
#
#######################################################################

#----------------------------------------------------------------------
# Main Module - directives that cover basic functionality
#
#   http://wiki.nginx.org/NginxHttpMainModule
#
#----------------------------------------------------------------------

user              www;
worker_processes  2;

error_log  /var/log/nginx/error.log;
#error_log  /var/log/nginx/error.log  notice;
#error_log  /var/log/nginx/error.log  info;

pid        /var/run/nginx.pid;


#----------------------------------------------------------------------
# Events Module 
#
#   http://wiki.nginx.org/NginxHttpEventsModule
#
#----------------------------------------------------------------------

events {
    worker_connections  1024;
}


#----------------------------------------------------------------------
# HTTP Core Module
#
#   http://wiki.nginx.org/NginxHttpCoreModule 
#
#----------------------------------------------------------------------

http {
    server_tokens off;
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    access_log off;

    sendfile        on;
    keepalive_timeout  5;

    #gzip  on;
    gzip              on;
    gzip_http_version 1.0;
    gzip_vary         on;
    gzip_comp_level   6;
    gzip_types        text/xml text/css application/xhtml+xml application/xml application/rss+xml application/atom_xml application/x-javascript application/x-httpd-php;
    gzip_disable      "MSIE [1-6]\.";


    proxy_cache_path  /var/cache/nginx levels=1:2 keys_zone=czone:4m max_size=50m inactive=30d;
    proxy_temp_path   /var/tmp/nginx;
    proxy_cache_key   "$scheme://$host$request_uri";
    proxy_set_header  Host $host;
    proxy_set_header  X-Real-IP          $remote_addr;
    proxy_set_header  X-Forwarded-Host   $host;
    proxy_set_header  X-Forwarded-Server $host;
    proxy_set_header  X-Forwarded-For    $proxy_add_x_forwarded_for;

    #
    # The default server
    #

    upstream backend {
        server  127.0.0.1:8080;
    }

    server
    {
        listen 80 default_server;
        server_name _;

	client_max_body_size 10M;

        location /wp-admin { proxy_pass http://backend; }
        location ~ .*\.php { proxy_pass http://backend; }
        location / {
            if ($http_cookie ~* "wordpress_(?!test_cookie)") {
                set $do_not_cache 1;
            }
            proxy_no_cache     $do_not_cache;
            proxy_cache_bypass $do_not_cache;
            proxy_cache czone;
            proxy_cache_key "$scheme://$host$request_uri";
            proxy_cache_valid 0;
            proxy_pass http://backend;
        }
    }

    server {
        listen 8080 default_server;
        server_name  _;
        return 444;
    }

    # Load config files from the /etc/nginx/conf.d directory
    include /etc/nginx/conf.d/*.conf;

}

wp専用のバーチャルホスト。
example.com.confをコピーしてserver_nameと$vhost_rootを変更する。
あとはDNSを向けるだけ。