配置使用4台主机实现12台主机的集群
一、说明因为电脑只能开四个虚拟机，于是使用4台虚拟机模拟12台主机。
如下图所示：
图解：
1、四台虚拟机均使用 CentOS 6.5 系统；
2、前端使用 keepalived给haproxy作高可用，keepalived为双主模型，前端两主机互为主从，两虚拟IP为：172.16.36.100、172.16.36.200；
3、前端haproxy给后端的web服务器作负载均衡；
4、前端DNS用于keepalived两虚拟IP作轮询解析域名，域名为：www.wubin.com；
5、事实上，web服务器分为三组，一组用于存储图片，第二组用于存储静态文本，第三组用于存储动态程序；此处只使用两台web服务器实现，使用基于端口的各虚拟主机模拟各web服务器；
6、于是web服务器1中有五个虚拟主机，webserver_img是用于存储图片的虚拟主机，webserver_txt是用于存储静态文件的虚拟主机，webserver_dynamic是用于存储动态程序的虚拟主机；web服务器2中有一个虚拟主机webserver_dynamic；各同类别的虚拟主机互相作负载均衡集群；
7、PHP使用fast-cgi方式安装，两web服务器各安装一个；
8、mysql数据作主从复制，使用mysql-proxy对mysql数据库作读写分离；
各软件版本：
1、keepalived：keepalived-1.2.7-3.el6.x86_64，yum 安装
2、haproxy： haproxy-1.4.24-2.el6.x86_64，yum安装
3、bind：bind-9.8.2-0.17.rc1.el6_4.6.x86_64，yum安装
4、nginx：nginx-1.4.7，编译安装
5、PHP：php-5.4.26，编译安装fast-cgi方式
6、mysql：mariadb-10.0.10-linux-x86_64，二进制版本
7、mysql-proxy：mysql-proxy-0.8.3-linux-glibc2.3-x86-64bit，编译安装
二、实现
1、操作前提条件：
1)、使用任务计划将各主机的时间同步至ntp服务器
# vim /etc/crontab
*/3 * * * * /usr/sbin/ntpdate 172.16.0.1 &> /dev/null
2)、各主机配置IP与主机名
前端一： ha1.wubin.com172.16.36.10
前端二： ha2.wubin.com172.16.36.20
web1服务器：web1.wubin.com172.16.36.30
web2服务器：web2.wubin.com172.16.36.40
3)、给各虚拟机安装软件
2、实现步骤
1)、配置web服务
配置web1服务器上的虚拟主机，配置/etc/nginx/nginx.conf文件，配置5台虚拟主机，对应图片中的名字为：webserver_img*2、webserver_txt*2、webserver_dynamic；
#usernobody;
worker_processes1;
#error_loglogs/error.log;
#error_loglogs/error.lognotice;
#error_loglogs/error.loginfo;
#pid logs/nginx.pid;
events {
worker_connections1024;
}
http {
include mime.types;
default_typeapplication/octet-stream;
#log_formatmain'$remote_addr - $remote_user [$time_local] "$request" '
log_formatmain'$http_x_forwarded_for - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_loglogs/access.logmain;
sendfile on;
#tcp_nopush on;
#keepalive_timeout0;
keepalive_timeout65;
gzipon;
server {
listen 10010;
server_nameimg1.wubin.com;
#charset koi8-r;
access_log/var/web/log/img1.wubin.com.access.logmain;
location / {
root /var/web/htdocs/img.wubin.com;
indexindex.html index.htm;
}
error_page404/404.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_indexindex.php;
# fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# denyall;
#}
}
server {
listen 10020;
server_nameimg2.wubin.com;
#charset koi8-r;
access_log/var/web/log/img2.wubin.com.access.logmain;
location / {
root /var/web/htdocs/img.wubin.com;
indexindex.html index.htm;
}
error_page404/404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/img.wubin.com;
}
location =/404.html {
root /var/web/htdocs/img.wubin.com;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# 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_indexindex.php;
# fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# denyall;
#}
}
server {
listen 10030;
server_nametxt1.wubin.com;
access_log/var/web/log/txt1.wubin.com.access.logmain;
location / {
root /var/web/htdocs/txt.wubin.com;
indexindex.html index.htm;
}
error_page404/404.html;
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/txt.wubin.com;
}
location =/404.html {
root /var/web/htdocs/txt.wubin.com;
}
}
server {
listen 10040;
server_nametxt2.wubin.com;
access_log/var/web/log/txt2.wubin.com.access.logmain;
location / {
root /var/web/htdocs/txt.wubin.com;
indexindex.html index.htm;
}
error_page404/404.html;
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/txt.wubin.com;
}
location =/404.html {
root /var/web/htdocs/txt.wubin.com;
}
}
server {
listen 10050;
server_namedynamic.wubin.com;
access_log/var/web/log/dynamic.wubin.com.access.logmain;
location / {
root /var/web/htdocs/dynamic.wubin.com;
indexindex.php index.html index.htm;
}
location ~ \.php$ {
root /var/web/htdocs/dynamic.wubin.com;
fastcgi_pass 127.0.0.1:9000;
fastcgi_indexindex.php;
fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;
include fastcgi_params;
}
error_page404/404.html;
error_page 500502503504/50x.html;
location =/50x.html {
root /var/web/htdocs/dynamic.wubin.com;
}
location =/404.html {
root /var/web/htdocs/dynamic.wubin.com;
}
}
}
配置web2服务器上的web服务，一台虚拟主机 webserver_dynamic；
#usernobody;
worker_processes1;
#error_loglogs/error.log;
#error_loglogs/error.lognotice;
#error_loglogs/error.loginfo;
#pid logs/nginx.pid;
events {
worker_connections1024;
}
http {
include mime.types;
default_typeapplication/octet-stream;
#log_formatmain'$remote_addr - $remote_user [$time_local] "$request" '
log_formatmain'$http_x_forwarded_for - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_loglogs/access.logmain;
sendfile on;
#tcp_nopush on;
#keepalive_timeout0;
keepalive_timeout65;
#gzipon;
server {
listen 80;
server_namelocalhost;
#charset koi8-r;
#access_loglogs/host.access.logmain;
location / {
root html;
indexindex.html index.htm;
}
#error_page404 /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_indexindex.php;
# fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# denyall;
#}
}
server {
listen 10050;
server_namedynamic.wubin.com;
access_log/var/web/log/dynamic.wubin.com.access.logmain;
location / {
root /var/web/htdocs/dynamic.wubin.com;
indexindex.php index.html index.htm;
}
location ~ \.php$ {
root /var/web/htdocs/dynamic.wubin.com;
fastcgi_pass 127.0.0.1:9000;
fastcgi_indexindex.php;
fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;
include fastcgi_params;
}
error_page404/404.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;
}
}
}
2)、配置PHP
使用基于 fast-cgi方式安装PHP，安装完成后，编辑/etc/nginx/fastcgi_params，将其内容更改为如下内容：
fastcgi_paramGATEWAY_INTERFACECGI/1.1;
fastcgi_paramSERVER_SOFTWARE nginx;
fastcgi_paramQUERY_STRING $query_string;
fastcgi_paramREQUEST_METHOD $request_method;
fastcgi_paramCONTENT_TYPE $content_type;
fastcgi_paramCONTENT_LENGTH $content_length;
fastcgi_paramSCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_paramSCRIPT_NAME $fastcgi_script_name;
fastcgi_paramREQUEST_URI $request_uri;
fastcgi_paramDOCUMENT_URI $document_uri;
fastcgi_paramDOCUMENT_ROOT $document_root;
fastcgi_paramSERVER_PROTOCOL $server_protocol;
fastcgi_paramREMOTE_ADDR $remote_addr;
fastcgi_paramREMOTE_PORT $remote_port;
fastcgi_paramSERVER_ADDR $server_addr;
fastcgi_paramSERVER_PORT $server_port;
fastcgi_paramSERVER_NAME $server_name;
而后重新载入nginx的配置文件：
# service nginx reload
3)、配置mysql主从；
主服务器配置，服务器IP为172.16.36.30：
# service mysqld stop
# vim /etc/my.cnf
log-bin=/mydata/binlog/master-bin //开启二进制日志
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) //创建复制帐号
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
从服务器配置，服务器IP为172.16.36.40：
# service mysqld stop
# vim /etc/my.cnf
#log-bin=/mydata/binlog/master-bin //关闭二进制日志
#binlog_format=mixed
server-id =11//设定 server-id
relay-log =/mydata/relaylogs/slave-bin//开启中继日志
# 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 //查看从服务器状态
Slave_IO_Running: No //表示IO线程没有启动
Slave_SQL_Running: No //表示SQL线程没有启动
mysql> start slave; //手动启动两个线程
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
4)、配置mysql-proxy
编译安装完成mysql-proxy后，为服务脚本提供配置文件/etc/sysconfig/mysql-proxy，内容如下所示：
# 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"
复制如下内容建立admin.lua文件，将其保存至/usr/local/mysql-proxy/share/doc/mysql-proxy/目录中。
--[[ $%BEGINLICENSE%$
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
02110-1301USA
$%ENDLICENSE%$ --]]
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(" 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
rows[#rows + 1] = {
i,
b.dst.name, -- configured backend address
states, -- the C-id is pushed down starting at 0
types, -- 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
启动服务
# service mysql-proxy start
查看mysql
# 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)]>
5)、配置haproxy，给后端web服务器实现负载均衡，前端两主机配置文件一样，配置文件为/etc/haproxy/haproxy.cfg；
#---------------------------------------------------------------------
# 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
#---------------------------------------------------------------------
frontendwebsrvs
bind *:80
acl url_img path_beg -i /img /imgs /image /images
acl url_img path_end -i .jpg .gif .png .jpeg
acl host_img hdr_beg(host)-i img. images.
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. images. 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 images, 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
6)、配置keepalived，给前端haproxy作高可用集群，配置文件为/etc/keepalived/keepalived.conf；两VIP可以实现当haproxy服务下线时VIP自动转移至另一主机；
主机：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
}
}
主机：172.16.36.20
! 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
}
}
7)、配置DNS服务器，172.16.36.20；
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";
配置文件/etc/named.rfc1912.zones
// 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";
};
配置文件/var/named/wubin.com.zone
$TTL 600
@ IN SOA dns.wubin.com dnsadmin.wubin.com (
2014030504
2H
4M
1D
2D )
@ IN NS dns.wubin.com.
@ IN MX10mail.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
测试：
# 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 May422:57:462014
;; MSG SIZErcvd:97
配置完成，打开一个windows xp系统，将DNS服务器的IP地址设成刚才配置的DNS服务器的IP地址；
打开浏览器安装程序，测试；
三、此集群不足之处
虽然各同类虚拟主机使用的是一个相同的目录实现的文件同步，但动静分离时，明显web文件需在所有虚拟主机目录存放一份；
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