配置使用4臺主機實現12臺主機的集羣
1、說明
由於電腦只能開四個虛擬機，因而使用4臺虛擬機模擬12臺主機。
以下圖所示：
圖解：
一、四臺虛擬機均使用 CentOS 6.5 系統；
二、前端使用 keepalived給haproxy做高可用，keepalived爲雙主模型，前端兩主機互爲主從，兩虛擬IP爲：172.16.36.100、172.16.36.200；
三、前端haproxy給後端的web服務器做負載均衡；
四、前端DNS用於keepalived兩虛擬IP做輪詢解析域名，域名爲：www.wubin.com；
五、事實上，web服務器分爲三組，一組用於存儲圖片，第二組用於存儲靜態文本，第三組用於存儲動態程序；此處只使用兩臺web服務器實現，使用基於端口的各虛擬主機模擬各web服務器；
六、因而web服務器1中有五個虛擬主機，webserver_img是用於存儲圖片的虛擬主機，webserver_txt是用於存儲靜態文件的虛擬主機，webserver_dynamic是用於存儲動態程序的虛擬主機；web服務器2中有一個虛擬主機webserver_dynamic；各同類別的虛擬主機互相做負載均衡集羣；
七、PHP使用fast-cgi方式安裝，兩web服務器各安裝一個；
八、mysql數據做主從複製，使用mysql-proxy對mysql數據庫做讀寫分離；
各軟件版本：
一、keepalived：keepalived-1.2.7-3.el6.x86_64，yum 安裝
二、haproxy： haproxy-1.4.24-2.el6.x86_64，yum安裝
三、bind：bind-9.8.2-0.17.rc1.el6_4.6.x86_64，yum安裝
四、nginx：nginx-1.4.7，編譯安裝
五、PHP：php-5.4.26，編譯安裝fast-cgi方式
六、mysql：mariadb-10.0.10-linux-x86_64，二進制版本
七、mysql-proxy：mysql-proxy-0.8.3-linux-glibc2.3-x86-64bit，編譯安裝
2、實現
一、操做前提條件：
1)、使用任務計劃將各主機的時間同步至ntp服務器
# vim /etc/crontab
*/3 * * * * /usr/sbin/ntpdate 172.16.0.1 &> /dev/null
2)、各主機配置IP與主機名
前端一： ha1.wubin.com 172.16.36.10
前端二： ha2.wubin.com 172.16.36.20
web1服務器：
web1.wubin.com 172.16.36.30
web2服務器：web2.wubin.com 172.16.36.40javascript
3)、給各虛擬機安裝軟件
二、實現步驟
1)、配置web服務
配置web1服務器上的虛擬主機，
配置/etc/nginx/nginx.conf文件，配置5臺虛擬主機，對應圖片中的名字爲：
webserver_img*二、
webserver_txt
*2
、
webserver_dynamic
；
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
log_format main '$http_x_forwarded_for - $remote_user [$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;
server {
listen 10010;
server_name img1.wubin.com;
#charset koi8-r;
access_log /var/web/log/img1.wubin.com.access.log main;
location / {
root /var/web/htdocs/img.wubin.com;
index index.html index.htm;
}
error_page 404/404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/img.wubin.com;
}
location =/404.html {
root /var/web/htdocs/img.wubin.com;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
server {
listen 10020;
server_name img2.wubin.com;
#charset koi8-r;
access_log /var/web/log/img2.wubin.com.access.log main;
location / {
root /var/web/htdocs/img.wubin.com;
index index.html index.htm;
}
error_page 404/404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/img.wubin.com;
}
location =/404.html {
root /var/web/htdocs/img.wubin.com;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
server {
listen 10030;
server_name txt1.wubin.com;
access_log /var/web/log/txt1.wubin.com.access.log main;
location / {
root /var/web/htdocs/txt.wubin.com;
index index.html index.htm;
}
error_page 404/404.html;
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/txt.wubin.com;
}
location =/404.html {
root /var/web/htdocs/txt.wubin.com;
}
}
server {
listen 10040;
server_name txt2.wubin.com;
access_log /var/web/log/txt2.wubin.com.access.log main;
location / {
root /var/web/htdocs/txt.wubin.com;
index index.html index.htm;
}
error_page 404/404.html;
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/txt.wubin.com;
}
location =/404.html {
root /var/web/htdocs/txt.wubin.com;
}
}
server {
listen 10050;
server_name dynamic.wubin.com;
access_log /var/web/log/dynamic.wubin.com.access.log main;
location / {
root /var/web/htdocs/dynamic.wubin.com;
index index.php index.html index.htm;
}
location ~ \.php$ {
root /var/web/htdocs/dynamic.wubin.com;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
include fastcgi_params;
}
error_page 404/404.html;
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/dynamic.wubin.com;
}
location =/404.html {
root /var/web/htdocs/dynamic.wubin.com;
}
}
}
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
log_format main '$http_x_forwarded_for - $remote_user [$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;
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500502503504/50x.html;
location =/50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
server {
listen 10050;
server_name dynamic.wubin.com;
access_log /var/web/log/dynamic.wubin.com.access.log main;
location / {
root /var/web/htdocs/dynamic.wubin.com;
index index.php index.html index.htm;
}
location ~ \.php$ {
root /var/web/htdocs/dynamic.wubin.com;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
include fastcgi_params;
}
error_page 404/404.html;
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/dynamic.wubin.com;
}
location =/404.html {
root /var/web/htdocs/dynamic.wubin.com;
}
}
}
使用基於 fast-cgi方式安裝PHP，安裝完成後，
編輯/etc/nginx/fastcgi_params，將其內容更改成以下內容：
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
# service nginx reload
3)、配置mysql主從；
主服務器配置，服務器IP爲172.16.36.30：
# service mysqld stop
# vim /etc/my.cnf
log-bin=/mydata/binlog/master-bin //開啓二進制日誌
binlog_format=mixed
server-id =1
# service mysqld start
# mysql
mysql> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'repluser'@'172.16.%.%' IDENTIFIED BY 'replpass';
Query OK, 0 rows affected (0.00 sec) //建立複製賬號
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
# service mysqld stop
# vim /etc/my.cnf
#log-bin=/mydata/binlog/master-bin //關閉二進制日誌
#binlog_format=mixed
server-id =11//設定 server-id
relay-log =/mydata/relaylogs/slave-bin //開啓中繼日誌
# mkdir /mydata/relaylogs
# chown -R mysql.mysql /mydata/relaylogs
# service mysqld start
# mysql
mysql> show global variables like '%relay%';
relay_log |/mydata/relaylogs/slave-bin
mysql> change master to master_host='172.16.36.30',master_user='repluser',master_password='replpass';
Query OK, 0 rows affected (0.07 sec)
mysql> show slave status\G //查看從服務器狀態
Slave_IO_Running: No //表示IO線程沒有啓動
Slave_SQL_Running: No //表示SQL線程沒有啓動
mysql> start slave; //手動啓動兩個線程
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
編譯安裝完成mysql-proxy後，
爲服務腳本提供配置文件/etc/sysconfig/mysql-proxy，內容以下所示：
# Options for mysql-proxy
ADMIN_USER="admin"
ADMIN_PASSWORD="admin"
ADMIN_ADDRESS=""
ADMIN_LUA_SCRIPT="/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua"
PROXY_ADDRESS=""
PROXY_USER="mysql-proxy"
PROXY_OPTIONS="--daemon --log-level=info --log-use-syslog --plugins=proxy --plugins=admin --proxy-backend-addresses=172.16.36.30:3309 --proxy-read-only-backend-addresses=172.16.36.40:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua"
--[[ $%BEGINLICENSE%$
Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the
License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; ifnot, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
$%ENDLICENSE%$ --]]
function set_error(errmsg)
proxy.response = {
type = proxy.MYSQLD_PACKET_ERR,
errmsg = errmsg or"error"
}
end
function read_query(packet)
if packet:byte() ~= proxy.COM_QUERY then
set_error("[admin] we only handle text-based queries (COM_QUERY)")
return proxy.PROXY_SEND_RESULT
end
local query = packet:sub(2)
local rows = { }
local fields = { }
if query:lower() =="select * from backends"then
fields = {
{ name ="backend_ndx",
type = proxy.MYSQL_TYPE_LONG },
{ name ="address",
type = proxy.MYSQL_TYPE_STRING },
{ name ="state",
type = proxy.MYSQL_TYPE_STRING },
{ name ="type",
type = proxy.MYSQL_TYPE_STRING },
{ name ="uuid",
type = proxy.MYSQL_TYPE_STRING },
{ name ="connected_clients",
type = proxy.MYSQL_TYPE_LONG },
}
for i =1, #proxy.global.backends do
local states = {
"unknown",
"up",
"down"
}
local types = {
"unknown",
"rw",
"ro"
}
local b = proxy.global.backends[i]
rows[#rows + 1] = {
i,
b.dst.name, -- configured backend address
states[b.state +1], -- the C-id is pushed down starting at 0
types[b.type +1], -- the C-id is pushed down starting at 0
b.uuid, -- the MySQL Server's UUID if it is managed
b.connected_clients -- currently connected clients
}
end
elseif query:lower() == "select * from help" then
fields = {
{ name = "command",
type = proxy.MYSQL_TYPE_STRING },
{ name = "description",
type = proxy.MYSQL_TYPE_STRING },
}
rows[#rows + 1] = { "SELECT * FROM help", "shows this help" }
rows[#rows + 1] = { "SELECT * FROM backends", "lists the backends and their state" }
else
set_error("use 'SELECT * FROM help' to see the supported commands")
return proxy.PROXY_SEND_RESULT
end
proxy.response = {
type = proxy.MYSQLD_PACKET_OK,
resultset = {
fields = fields,
rows = rows
}
}
return proxy.PROXY_SEND_RESULT
end[root@web1 ~]# service mysql-proxy start
[root@web1 ~]# mysql -uadmin -padmin -h172.16.36.30 --port=4041
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version:5.0.99-agent-admin
Copyright (c) 2000, 2014, Oracle, SkySQL Ab and others.
Type 'help;'or'\h'for help. Type '\c' to clear the current input statement.
MySQL [(none)]> select * from backends;
+-------------+-------------------+---------+------+------+-------------------+
| backend_ndx | address | state | type | uuid | connected_clients |
+-------------+-------------------+---------+------+------+-------------------+
|1|172.16.36.30:3309| up | rw | NULL |1|
|2|172.16.36.40:3306| unknown | ro | NULL |0|
+-------------+-------------------+---------+------+------+-------------------+
2 rows in set (0.00 sec)
MySQL [(none)]>
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend websrvs
bind *:80
acl url_img path_beg -i /img /imgs /p_w_picpath /p_w_picpaths
acl url_img path_end -i .jpg .gif .png .jpeg
acl host_img hdr_beg(host) -i img. p_w_picpaths.
acl url_txt path_beg -i /css /javascript /js /stylesheets
acl url_txt path_end -i .css .js .html .htm .shtml .xml
acl host_static hdr_beg(host) -i img. video. download. ftp. imgs. p_w_picpaths. videos.
acl url_php path_end -i .php
use_backend imgserver if url_img or host_img
use_backend txtserver if url_txt
use_backend dynamicserver if url_php
default_backend dynamicserver
#---------------------------------------------------------------------
# static backend for serving up p_w_picpaths, stylesheets and such
#---------------------------------------------------------------------
backend imgserver
balance roundrobin
server img1.wubin.com 172.16.36.30:10010 check
server img2.wubin.com 172.16.36.30:10020 check
backend txtserver
balance roundrobin
server txt1.wubin.com 172.16.36.30:10030 check
server txt2.wubin.com 172.16.36.30:10040 check
backend dynamicserver
cookie node insert nocache
balance roundrobin
server dynamic1.wubin.com 172.16.36.30:10050 check rise 2 fall 5 cookie node1
server dynamic2.wubin.com 172.16.36.40:10050 check rise 2 fall 5 cookie node2
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
#backend dynamic
# balance roundrobin
# server node2.wubin.com 192.168.0.12:80 check maxconn 1000
listen statistics
bind *:8009
stats enable
stats auth admin:admin
stats uri /hastatus
stats admin if TRUE
stats hide-version
主機：172.16.36.10
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from admin@wubin.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 36
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 111136
}
virtual_ipaddress {
172.16.36.100
}
track_script {
chk_haproxy
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 136
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111136
}
virtual_ipaddress {
172.16.36.200
}
track_script {
chk_haproxy
}
}
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from admin@wubin.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 36
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 111136
}
virtual_ipaddress {
172.16.36.100
}
track_script {
chk_haproxy
}
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 136
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111136
}
virtual_ipaddress {
172.16.36.200
}
track_script {
chk_haproxy
}
}
配置文件/etc/named.conf：
//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/for example named configuration files.
//
options {
// listen-on port 53 { 127.0.0.1; };
// listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
// allow-query { localhost; };
// recursion yes;
// dnssec-enable yes;
// dnssec-validation yes;
// dnssec-lookaside auto;
/* Path to ISC DLV key */
// bindkeys-file "/etc/named.iscdlv.key";
// managed-keys-directory "/var/named/dynamic";
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
zone "." IN {
type hint;
file "named.ca";
};
include "/etc/named.rfc1912.zones";
#include "/etc/named.root.key";
// named.rfc1912.zones:
//
// Provided by Red Hat caching-nameserver package
//
// ISC BIND named zone configuration for zones recommended by
// RFC 1912 section 4.1: localhost TLDs and address zones
//and http://www.ietf.org/internet-drafts/draft-ietf-dnsop-default-local-zones-02.txt
// (c)2007 R W Franks
//
// See /usr/share/doc/bind*/sample/for example named configuration files.
//
zone "localhost.localdomain" IN {
type master;
file "named.localhost";
allow-update { none; };
};
zone "localhost" IN {
type master;
file "named.localhost";
allow-update { none; };
};
zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
type master;
file "named.loopback";
allow-update { none; };
};
zone "1.0.0.127.in-addr.arpa" IN {
type master;
file "named.loopback";
allow-update { none; };
};
zone "0.in-addr.arpa" IN {
type master;
file "named.empty";
allow-update { none; };
};
zone "wubin.com" IN {
type master;
file "wubin.com.zone";
};
$TTL 600
@ IN SOA dns.wubin.com dnsadmin.wubin.com (
2014030504
2H
4M
1D
2D )
@ IN NS dns.wubin.com.
@ IN MX 10 mail.wubin.com.
dns IN A 172.16.36.20
mail IN A 172.16.36.20
www IN A 172.16.36.100
www IN A 172.16.36.200
[root@ha2 ~]# dig -t A www.wubin.com @172.16.36.20
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.6<<>>-t A www.wubin.com @172.16.36.20
;; global options:+cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id:7045
;; flags: qr aa rd ra; QUERY:1, ANSWER:2, AUTHORITY:1, ADDITIONAL:1
;; QUESTION SECTION:
;www.wubin.com. IN A
;; ANSWER SECTION:
www.wubin.com. 600 IN A 172.16.36.200
www.wubin.com. 600 IN A 172.16.36.100
;; AUTHORITY SECTION:
wubin.com. 600 IN NS dns.wubin.com.
;; ADDITIONAL SECTION:
dns.wubin.com. 600 IN A 172.16.36.20
;; Query time:2 msec
;; SERVER:172.16.36.20#53(172.16.36.20)
;; WHEN: Sun May 422:57:462014
;; MSG SIZE rcvd:97
雖然各同類虛擬主機使用的是一個相同的目錄實現的文件同步，但動靜分離時，明顯web文件需在全部虛擬主機目錄存放一份；
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