部署Linux服务群集
一、拓扑图
二、硬件环境
三台服务器 + windows客户端
|
主机名称 |
IP地址 |
服务 |
备注 |
|
|
Dns |
192.168.100.100 |
DNS、HeartBeat |
|
|
|
192.168.100.200 |
HeartBeat |
Dns服务的心跳地址 |
||
|
dns2 |
||||
|
192.168.100.101 |
Dns、HeartBeat |
|
||
|
n1 |
192.168.100.102 |
Nginx、LVS HeartBeat Mysql |
负载均衡、故障转移 |
|
|
192.168.100.10/150 |
LVS-NAT、LVS-DR |
|
||
|
n2 |
||||
|
192.168.106.103 |
Nginx、HeartBeat、mysql |
负载均衡、故障转移 |
||
|
Client |
|
|
|
四、部署步骤
1.Linux服务配置基础信息设置
修改主机名
[root@localhost ~]# vim /etc/hosts
127.0.0.1 localhost dns localhost4 localhost4.localdomain4
::1 localhost dns localhost6 localhost6.localdomain6
[root@localhost ~]# vim /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=dns
NTPSERVERARGS=iburst
[root@localhost ~]# reboot
依次修改主机名分别为
关闭防火墙
[root@dns ~]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
[root@dns ~]# iptables -F
[root@dns ~]# service iptables stop
[root@dns ~]# chkconfig –list iptables
iptables 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:关闭 6:关闭
[root@dns ~]# chkconfig –level 2345 iptables off
[root@dns ~]# chkconfig –list iptables
iptables 0:关闭 1:关闭 2:关闭 3:关闭 4:关闭 5:关闭 6:关闭
配置本地yum源
[root@dns ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root 18G 3.8G 13G 24% /
tmpfs 491M 76K 491M 1% /dev/shm
/dev/sda1 485M 35M 426M 8% /boot
/dev/sr0 4.2G 4.2G 0 100% /media/CentOS_6.5_Final
[root@dns ~]# cd /etc/yum.repos.d/
[root@dns yum.repos.d]# ll
[root@dns yum.repos.d]# mv CentOS-Base.repo CentOS-Base.repo.tmp
[root@dns yum.repos.d]# ll
总用量 16
-rw-r–r–. 1 root root 1926 11月 27 2013 CentOS-Base.repo.tmp
-rw-r–r–. 1 root root 638 11月 27 2013 CentOS-Debuginfo.repo
-rw-r–r–. 1 root root 640 11月 25 06:36 CentOS-Media.repo
-rw-r–r–. 1 root root 3664 11月 27 2013 CentOS-Vault.repo
[root@dns yum.repos.d]# vim CentOS-Media.repo
[root@dns yum.repos.d]# cd ~
2.安装DNS服务
[root@dns ~]# yum install -y bind bind-chroot
[root@dns ~]# vim /etc/named.conf
[root@dns ~]# vim /etc/named.rfc1912.zones
zone “bainan.cn” IN {
type master;
file “bn.cn”;
allow-update { none; };
};
zone “100.168.192.in-addr.arpa” IN {
type master;
file “100.empty”;
allow-update { none; };
};
[root@dns ~]# cd /var/named/
[root@dns named]# ll
[root@dns named]# cp named.localhost bn.cn
[root@dns named]# cp named.empty 100.empty
[root@dns named]# chgrp named *
[root@dns named]# ll
总用量 40
-rw-r—–. 1 root named 270 11月 26 03:26 100.empty
-rw-r—–. 1 root named 262 11月 26 03:25 bn.cn
drwxr-x—. 6 root named 4096 11月 25 06:37 chroot
drwxrwx—. 2 named named 4096 11月 25 06:43 data
drwxrwx—. 2 named named 4096 11月 26 03:27 dynamic
-rw-r—–. 1 root named 1892 2月 18 2008 named.ca
-rw-r—–. 1 root named 152 12月 15 2009 named.empty
-rw-r—–. 1 root named 152 6月 21 2007 named.localhost
-rw-r—–. 1 root named 168 12月 15 2009 named.loopback
drwxrwx—. 2 named named 4096 8月 27 2013 slaves
[root@dns named]# vim bn.cn
$TTL 3H
@ IN SOA @ dns.bainan.cn. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS dns.bainan.cn.
dns IN A 192.168.100.100
dns2 IN A 192.168.100.101
n1 IN A 192.168.100.102
n2 IN A 192.168.100.103
www IN A 192.168.100.200
[root@dns named]# vim 100.empty
$TTL 3H
@ IN SOA @ dns.bainan.cn. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS dns.bainan.cn.
100 IN PTR dns.bainan.cn.
101 IN PTR dns2.bainan.cn.
102 IN PTR n1.bainan.cn.
103 IN PTR n2.bainan.cn.
200 IN PTR www.bainan.cn.
[root@dns named]# service named start
启动 named： [确定]
[root@dns ~]# nslookup
> dns.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: dns.bainan.cn
Address: 192.168.100.100
> dns2.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: dns2.bainan.cn
Address: 192.168.100.101
> n1.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: n1.bainan.cn
Address: 192.168.100.102
> n2.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: n2.bainan.cn
Address: 192.168.100.103
将dns1的DNS配置文件复制到dns2上
[root@dns ~]# scp /etc/named.conf 192.168.100.101:/etc/named.conf
[root@dns ~]# scp /etc/named.rfc1912.zones 192.168.100.101:/etc/named.rfc1912.zones
[root@dns ~]# scp /var/named/bn.cn 192.168.100.101:/var/named/
[root@dns ~]# scp /var/named/100.empty 192.168.100.101:/var/named/
在dns2上启动DNS服务
[root@dns2 yum.repos.d]# cd ~
[root@dns2 ~]# service named start
Generating /etc/rndc.key: [确定]
启动 named： [确定]
[root@n2 ~]# nslookup
> dns.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: dns.bainan.cn
Address: 192.168.100.100
> dns2.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: dns2.bainan.cn
Address: 192.168.100.101
> n1.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: n1.bainan.cn
Address: 192.168.100.102
> n2.bainan.cn
Server: 192.168.100.100
Address: 192.168.100.100#53
Name: n2.bainan.cn
Address: 192.168.100.103
[root@dns ~]# chkconfig –list named
named 0:关闭 1:关闭 2:关闭 3:关闭 4:关闭 5:关闭 6:关闭
[root@dns ~]# chkconfig –level 2345 named on
[root@dns ~]# chkconfig –list named
named 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
在dns2上做相同的操作
3.HeartBeat 高可用集群
配置个服务器基本网络环境
[root@dns ~]# ifconfig
[root@dns2 ~]# ifconfig
安装HeartBeat及相关的组件包（本地yum源安装方法）
[root@dns ~]# cd /etc/yum.repos.d/
[root@dns yum.repos.d]# ll
[root@dns yum.repos.d]# rm -f CentOS-Base.repo
[root@dns yum.repos.d]# ll
[root@dns yum.repos.d]# vim CentOS-Media.repo
[c6-media]
name=CentOS-$releasever – Media
baseurl=file:///media/CentOS_6.5_Final/
file:///media/cdrom/
file:///media/cdrecorder/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
[root@dns yum.repos.d]# cd /tmp/
[root@dns tmp]# mkdir hb
[root@dns tmp]# cd hb/
将HeartBeat相关的组件包复制到/tmp/hb/下
[root@dns hb]# yum localinstall -y *.rpm
配置主服务器的HeartBeat
进入HeartBeat的配置文件模板目录，复制模板到配置文件目录中
[root@dns ~]# cd /usr/share/doc/heartbeat-3.0.4/
[root@dns heartbeat-3.0.4]# ls
apphbd.cf AUTHORS COPYING ha.cf README
authkeys ChangeLog COPYING.LGPL haresources
[root@dns heartbeat-3.0.4]# cp authkeys ha.cf haresources /etc/ha.d/
[root@dns heartbeat-3.0.4]# cd /etc/ha.d/
[root@dns ha.d]# ls
authkeys ha.cf harc haresources rc.d README.config resource.d shellfuncs
编辑认证文件authkeys，定义节点服务器间的认证方式
[root@dns ha.d]# vi authkeys
auth 3
1 crc
2 sha1 HI!
3 md5 Hello!
修改authkeys文件的权限
[root@dns ha.d]# ll authkeys
-rw-r–r–. 1 root root 641 11月 26 06:20 authkeys
[root@dns ha.d]# chmod 600 authkeys
[root@dns ha.d]# ll authkeys
-rw——-. 1 root root 641 11月 26 06:20 authkeys
编辑资源管理文件
[root@dns ha.d]# vi haresources
在末行插入
dns 192.168.100.200/24/eth1:0 named
//dns:主服务器名
//192.168.100.200：vip
//named 服务名称
编辑主配置文件：
[root@dns ha.d]# vi ha.cf
24 debugfile /var/log/ha-debug //定义调试信息文件路径
29 logfile /var/log/ha-log //定义日志文件
48 keepalive 3 //定义心跳检查的时间间隔单位s
56 deadtime 30 //定义死亡时间单位s
61 warntime 10 //定义警告时间为10s（10s没收到心跳就告警）
71 initdead 60 //定义初始化时间为60s
76 udpport 694 //定义udp监听端口为694
122 ucast eth0 192.168.100.101 //定义侦听心跳的接口和对端IP地址
157 auto_failback on //启用抢占模式
213 node dns //定义成员节点
214 node dns2
254 respawn hacluster /usr/lib64/heartbeat/ipfail //定义使用该脚本去侦听对方是否活着
配置从服务器的HeartBeat
通过scp将三个主要的配置文件传到dns2上
[root@dns ha.d]# scp authkeys haresources ha.cf 192.168.100.101:/etc/ha.d/
修改心跳设置
[root@dns2 ~]# cd /etc/ha.d/
You have new mail in /var/spool/mail/root
[root@dns2 ha.d]# vi ha.cf
122 ucast eth1 192.168.100.100
启动HeartBeat的服务，先主后从的启动
[root@dns ha.d]# service heartbeat start
[root@dns ha.d]# service httpd start
正在启动 httpd：
[root@dns ha.d]# service httpd status
httpd (pid 9978) 正在运行…
[root@dns ha.d]# ifconfig
在从服务器上启动HeartBeat服务
[root@dns2 ha.d]# service heartbeat start
Starting High-Availability services: INFO: Resource is stopped
Done.
[root@dns2 ~]# service httpd start
正在启动 httpd：
[root@dns2 ~]# ifconfig
[root@dns ~]# chkconfig –list heartbeat
heartbeat 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
dns2同理
[root@dns2 ~]# chkconfig –list heartbeat
heartbeat 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
访问测试
将上面的Apache替换成Nginx，在n1和n2中安装Nginx服务停掉dns和dns2中httpd服务
Nginx负载均衡
安装Nginx
创建nginx的yum源文件
[root@n1 ~]# vi /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/6/$basearch/
gpgcheck=0
enabled=1
[root@n1 ~]# yum makecache
[root@n1 yum.repos.d]# rpm -ivh nginx-1.10.1-1.el6.ngx.x86_64.rpm
[root@n1 yum.repos.d]# yum -l install nginx
[root@n1 yum.repos.d]# which nginx
/usr/sbin/nginx
[root@n1 yum.repos.d]# service nginx status
-b 已停
[root@n1 yum.repos.d]# service nginx start
正在启动 nginx： [确定]
安装支持的模块
[root@n1 ~]# yum install zlib
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
* c6-media:
Setting up Install Process
Package zlib-1.2.3-29.el6.x86_64 already installed and latest version
Nothing to do
[root@n1 ~]# yum install pcre
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
* c6-media:
Setting up Install Process
Package pcre-7.8-6.el6.x86_64 already installed and latest version
Nothing to do
[root@n1 ~]# yum install openssl
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
* c6-media:
Setting up Install Process
Package openssl-1.0.1e-15.el6.x86_64 already installed and latest version
Nothing to do
[root@n1 ~]# service httpd status
httpd 已停
[root@n1 ~]# chkconfig –list httpd
httpd 0:关闭 1:关闭 2:关闭 3:关闭 4:关闭 5:关闭 6:关闭
[root@n1 ~]# chkconfig –level 2345 nginx on
[root@n1 ~]# chkconfig –list nginx
nginx 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
[root@n1 ~]# vim /etc/nginx/nginx.conf
use epoll;
worker_connections 65535;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
server_tokens off;
server_names_hash_bucket_size 128;
log_format ups \’$remote_addr [$time_local] $request $status \’
\’u_content_t $upstream_http_content_type \’
\’u_addr $upstream_addr \’
\’u_status $upstream_status \’
\’u_rsp_ti $upstream_response_time \’
\’$http_user_agent\’ ;
upstream bainan.cn {
server n1.bainan.cn:80 weight=10 max_fails=3 fail_timeout=20s;
server n2.bainan.cn:80 weight=10 max_fails=3 fail_timeout=20s;
}
server{
listen 80;
server_name www.bainan.cn 192.168.100.200;
index index.htm index.html;
root /website/bainan.cn;
location / {
access_log /dev/shm/access.log ups;
proxy_pass http://bainan.cn;
proxy_redirect off;
proxy_set_header Host $remote_addr;
proxy_set_header remote_addr $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_body_buffer_size 128K;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 64k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}
}
[root@n1 ~]# nginx -s reload
在Client上创建测试站点
N1
N2
虚拟IP：192.168.100.200
(VIP)
LVS负载均衡（NAT）配置-wrr
[root@n1 桌面]# ifconfig eth1:0 192.168.100.200 netmask 255.255.255.0
[root@n1 桌面]# ifup eth1:0
eth1:0 Link encap:Ethernet HWaddr 00:0C:29:36:85:9E
inet addr:192.168.100.200 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[root@n2 桌面]# ifconfig eth1:1 192.168.100.110 netmask 255.255.255.0
[root@n2 桌面]# ifup eth0
eth1:1 Link encap:Ethernet HWaddr 00:0C:29:36:85:9E
inet addr:192.168.100.111 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
在Node1上安装ipvsadm及其组件
[root@n1 ~]# cd 桌面
[root@n1 桌面]# yum localinstall popt-static-1.13-7.el6.x86_64.rpm
[root@n1 桌面]# yum install -y libnl*
[root@n1 桌面]# yum install -y ipvsadm
查看和加载ipvsadm是否在内核模块中
[root@n1 桌面]# lsmod | grep ip_vs
[root@n1 桌面]# modprobe ip_vs
[root@n1 桌面]# lsmod | grep ip_vs
[root@n1 桌面]# ifconfig eth1:1 192.168.100.110 netmask 255.255.255.0
[root@n1 桌面]# ifconfig eth1:1
eth1:1 Link encap:Ethernet HWaddr 00:0C:29:08:C8:EE
inet addr:192.168.100.110 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[root@n1 桌面]# ipvsadm -C
[root@n1 桌面]# ipvsadm –set 30 5 60
[root@n1 桌面]# ipvsadm -A -t 192.168.100.200:80 -s wrr -p 20
[root@n1 桌面]# ipvsadm -L
[root@n1 桌面]# ipvsadm -a -t 192.168.100.200:80 -r 192.168.100.110:80 -g -w 1
[root@n1 桌面]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.100.200:80 wrr persistent 20
-> 192.168.100.110:80 Route 1 0 0
[root@n1 桌面]# ifconfig eth1:1 192.168.100.110 netmask 255.255.255.0
[root@n1 桌面]# ifconfig lo:0 192.168.100.200 netmask 255.255.255.255
[root@n1 桌面]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@n1 桌面]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@n1 桌面]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@n1 桌面]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
n2同理
LVS负载均衡（DR）配置加DNS
安装DNS服务、配置yum源步骤同上
[root@dns ~]# lsmod |grep ip_vs
[root@dns ~]# modprobe ip_vs
[root@dns ~]# lsmod |grep ip_vs
[root@dns ~]# yum install ipvsadm
[root@dns ~]# ipvsadm -S
[root@dns ~]# ipvsadm -L
[root@dns ~]# ifconfig
root@dns ~]# ifconfig eth1:1 192.168.100.10 netmask 255.255.255.0
[root@dns ~]# ifconfig
[root@dns ~]# ipvsadm -A -t 192.168.100.10:80 -s wlc
[root@dns ~]# ipvsadm -a -t 192.168.100.10:80 -r 192.168.100.102 -g -w 2
[root@dns ~]# ipvsadm -a -t 192.168.100.10:80 -r 192.168.100.103 -g -w 1
[root@dns ~]# ipvsadm -S
[root@dns ~]# ipvsadm -L
[root@dns ~]# service ipvsadm save
ipvsadm: Saving IPVS table to /etc/sysconfig/ipvsadm: [确定]
[root@dns ~]# cat /etc/sysconfig/ipvsadm
[root@dns ~]# service ipvsadm restart
ipvsadm: Clearing the current IPVS table: [确定]
ipvsadm: Unloading modules: [确定]
ipvsadm: Clearing the current IPVS table: [确定]
ipvsadm: Applying IPVS configuration: [确定]
[root@dns ~]# ipvsadm -L
转到n1上
[root@n1 ~]# ifconfig lo:0 192.168.100.10 netmask 255.255.255.255
[root@n1 ~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@n1 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@n1 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
[root@n1 ~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@n1 ~]# ifconfig
转到n1上
[root@n1 ~]# ifconfig lo:0 192.168.100.10 netmask 255.255.255.255
[root@n1 ~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@n1 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@n1 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
[root@n1 ~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@n1 ~]# ifconfig
转到n2上
[root@n2 ~]# ifconfig
[root@n2 ~]# ifconfig lo:0 192.168.100.10 netmask 255.255.255.255
[root@n2 ~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@n2 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@n2 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@n2 ~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@n2 ~]# service nginx stop
停止 nginx： [确定]
[root@n2 ~]# service httpd start
正在启动 httpd：httpd: Could not reliably determine the server\’s fully qualified domain name, using ::1 for ServerName
[确定]
Heartbeat双热备(安装Mysql)
在dns主机上
添加mysql的DNS正反向查找
[root@dns ~]# cd /var/named/
[root@dns named]# ll
在DNS服务中天sql正反向解析， 详细步骤参照前面DNS服务部署步骤哦
[root@dns named]# vim bn.cn
[root@dns named]# vim 100.empty
安装mysql服务
[root@dns ~]# rpm -ivh mysql-community-server-8.0.13-1.el6.x86_64.rpm
[root@dns ~]# mysql -n root
[root@dns ~]# service mysqld start
n1、n2 同理安装MySql’
[root@dns ~]# mysql -n root -h 192.168.100.102 -p
[root@dns ~]#
N2
[root@n2 ~]# mysqladmin -u root password ‘123456’
[root@n2 ~]# mysql -u root -p
输入密码
Mysql> shoy database;
Mysql> create database stus;
Mysql> use stus;
Mysql> create table students(id char(8) not null,name varchae(20) npt null,age int ,primary key(id));
Mysql> desc students;
Mysql> show tables;
Mysql> insert into students(id,name,age) values(‘20190301’,’llili’,20);
Mysql> select * from students;
Mysql> quit
[root@n2 ~]# mysql -u root -h 192.168.100.102 -p
[root@n2 ~]# mysql -u root -h 127.0.0.1 -p
# gedit /etc/my.cnf
7# bind-address=0.0.0.0
#service mysqld restart
[root@n2 ~]# mysql -u root -h 192.168.100.102 -p
[root@n2 ~]# mysql -u root -h 127.0.0.1 -p
>show database;
>use mysql;
>desc database;
>select host,user from user;
> update user set host=’%’ where host=’n2’;
>select host,user from user;
>quit
#mysql -u root -h 192.168.100.103 -p
#service mysqld restart
[root@n2 ~]# mysql -u root -h 192.168.100.102 -p
[root@n2 ~]# mysql -u root -h 127.0.0.1 -p
>use musql
>select host,user from user;
>flush privileges;
> update user set host=’n2’ where host=’%’;
>select host,user from user;
> update user set host=’%’ where host=’127.0.0.1’;
>select host,user from user;
>select host,user,password from user;
> update user set host=’127.0.0.1’ where host=’%’;
>select host,user,password from user;
> update user set host=’127.0.0.1’ where host=’root’;
>quit
N1同理
dns#mysql -n root -h 192.168.100.102 -p
dns#mysql -n root -h 192.168.100.101 -p
在n1和n2上添加Hertbeat服务，故障转移#
Heartbeat安装过程参照文档前面Heartbeat安装步骤
注意hare****文件155行添加
N1 192.168.100.2150/24/eth1:0 mysqld
N2 同理。