Master1 192.168.20.145Master2 192.168.20.146安装mysqlmysql安装脚本：#!/bin/bash

yum -y install cmake

tar zxvf  mysql-5.5.34.tar.gz

cd mysql-5.5.34

cmake -DCMAKE_INSTALL_PREFIX=/work/mysql5.5 -DMYSQL_UNIX_ADDR=/usr/local/mysql/mysql.sock  -DDEFAULT_CHARSET=utf8  -DDEFAULT_COLLATION=utf8_general_ci  -DWITH_MYISAM_STORAGE_ENGINE=1  -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_MEMORY_STORAGE_ENGINE=1 -DWITH_READLINE=1 -DENABLED_LOCAL_INFILE=1 -DMYSQL_DATADIR=/data/mysql/3306/data/  -DMYSQL_USER=mysql  -DMYSQL_TCP_PORT=3306

make && make install && echo  "install MYSQL ok"

chmod  +w /work/mysql5.5/

chown  -R mysql:mysql /work/mysql5.5/

mkdir -p /data/mysql/3306/data

chown  -R mysql:mysql /data/mysql/

/work/mysql5.5/scripts/mysql_install_db  --basedir=/work/mysql5.5/ --datadir=/data/mysql/3306/data/ --user=mysql

cp support-files/my-medium.cnf /etc/my.cnf

cp support-files/mysql.server /etc/init.d/mysql

chmod  +x /etc/init.d/mysql

sed -i '37a\basedir = /work/mysql5.5' /etc/my.cnf

sed -i '38a\datadir = /data/mysql/3306/data' /etc/my.cnf

sed -i '39a\log-error = /data/mysql/3306/mysql_error.log' /etc/my.cnf

sed -i '40a\pid-file = /data/mysql/3306/mysql.pid' /etc/my.cnf

chkconfig  --add mysql

chkconfig  mysql on

service mysql start锁库进行数据同步，配置主主复制Master 2

server-id= 1

log-bin=mysql-bin

log-slave-updates

Master 2

log-bin=mysql-bin

binlog_format=mixed

server-id= 2

relay-log=relay-bin

relay-log-index=relay-bin.index

log-slave-updates

首先配置主从同步，主：show master status\G;从：change master tomaster_host='192.168.20.146',master_user='slave001',master_password='tl@123 ',master_log_file='mysql-bin.000002',master_log_pos=107,MASTER_CONNECT_RETRY=10;start slaveshow slave status\G;两台主机互相为主wgettar zxvf keepalived-1.2.7.tar.gzcd keepalived-1.2.7./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-279.el6.x86_64make && make installcp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

chkconfig keepalived onmkdir /etc/keepalivedvim/etc/keepalived/keepalived.confglobal_defs {

notification_email {

mengtao10@163.com

}

#当主、备份设备发生改变时，通过邮件通知

notification_email_from lzyangel@126.com

smtp_server stmp.163.com

smtp_connect_timeout 30

router_id MySQL-ha

}

vrrp_instance VI_1{

# 在初始化状态下定义为主设备

state BACKUP

# 注意网卡接口

interface eth0

virtual_router_id 51

# 优先级，另一台改为90

priority 100

advert_int 1

# 不主动抢占资源

nopreempt

authentication {

# 认证方式，可以是PASS或AH两种认证方式

auth_type PASS

# 认证密码

auth_pass 1111

}

virtual_ipaddress {

# 虚拟IP地址，随着state的变化而增加删除

192.168.20.111

}

}

virtual_server 192.168.20.111 3306 {

# 每个2秒检查一次real_server状态

delay_loop 2

# LVS算法

lb_algo wrr

# LVS模式

lb_kind DR

# 会话保持时间

persistence_timeout 60

protocol TCP

real_server 192.168.20.146 3306 {

# 权重

weight 3

# 检测到服务down后执行的脚本

notify_down /etc/rc.d/keepalived.sh

TCP_CHECK {

# 连接超时时间

connect_timeout 10

# 重连次数

nb_get_retry 3

# 重连间隔时间

delay_before_retry 3

# 健康检查端口

connect_port 3306

}

}

}另外一台主机参考此配置在主的master1上编写检测服务down后所要执行的脚本vim /etc/rc.d/keepalived.sh#!/bin/bash

#环境变量

PATH=/bin:/usr/bin:/sbin:/usr/sbin:/work/mysql5.5/bin/; export PATH

sleep 5

#mysql_id(存活=1死掉=0)

mysql_id=ps -C mysqld --noheader | wc -l

#判断mysql_id如果死掉，则重启mysql一次，若仍然无法启动mysql，则杀掉keepalived进程实现VIP切换

if [ $mysql_id -eq 0 ]

then

service mysql restart

sleep 5

if [ $mysql_id -eq 0 ]

then

/etc/init.d/keepalived stop

fi

fi

Master 2 上的脚本：vim /etc/rc.d/keepalived.sh#!/bin/bash

/etc/init.d/keepalived  stop

分别在两台机器上启动keepalived 和 此脚本，那台mysql首先开启，那台就是当做master来使用可以看到虚拟ip已经绑定到优先级高的主机上了进行连接测试是没有问题，尝试修改mysql的配置，然后观察结束掉mysql进程，虚拟ip会直通切换到另外一台主机去