假设已经搭建好了mysql并且存在正常状态的主主复制

1、安装keepalived并且根据业务的vip及主机网卡，ip配置好/etc/keepalived/keepalived.conf，具体操作已在代码框中实现

1、安装环境（谨慎，建议先编译，能通过就不要进行第一步了）yum -y install popt popt-devel popt-static openssl-devel kernel-devel【必要时卸载掉libnl 和 libnl-devel】2、编译安装#tar -zxvf keepalived-1.2.23.tar.gz#cd keepalived-1.2.23#./configure --prefix=/usr/local/keepalived编译结果如下则正确，不必每一项都比对Keepalived configuration------------------------Keepalived version       : 1.2.23Compiler                 : gccCompiler flags           : -g -O2Extra Lib                : -lssl -lcrypto -lcrypt Use IPVS Framework       : YesIPVS sync daemon support : YesIPVS use libnl           : Nofwmark socket support    : YesUse VRRP Framework       : YesUse VRRP VMAC            : YesUse VRRP authentication  : YesSNMP keepalived support  : NoSNMP checker support     : NoSNMP RFCv2 support       : NoSNMP RFCv3 support       : NoSHA1 support             : NoUse Debug flags          : NoMemory alloc check       : Nolibnl version            : NoneUse IPv4 devconf         : NoUse libiptc              : NoUse libipset             : No#make && make install3、配置环境#cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/#cp /usr/local/keepalived/sbin/keepalived /usr/sbin/#cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/#mkdir -p /etc/keepalived#cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/#chmod +x /etc/init.d/keepalived4、编辑配置文件#vim /etc/keepalived/keepalived.confglobal_defs {   router_id yy-interfacedb01        ###主机名，hostname}vrrp_instance VI_1 {    state MASTER       ###ha环境中扮演的角色    interface bond0        ###网卡    virtual_router_id 63   ###主机和备机相同的router_id,数字可随机    priority 100    ###争夺vip依靠的权限，两台keepalived服务同时存在的主机，权限值高的将会获取vip    advert_int 1    authentication {        auth_type PASS        auth_pass 1663    ###主从两台机子配置应该相同    }    virtual_ipaddress {        172.16.16.64/32   ###此处填写vip，掩码必须写32，原因我也不清楚    }}

2、主机上配置高可用环境（主从两台机子做相同配置）

1、编写监控脚本    #mkdir /home/mysql/watch#touch /home/mysql/watch/check_mysql_process.sh ### check_mysql_process.sh 内容如下 ####!/bin/sh#check mysql & switch hb HA process N/Arm -f /home/mysql/watch/mysql_process.exist ps -ef|grep mysql|grep datadir|grep 8808 |grep -v grep > /home/mysql/watch/mysql_process.existif [ -s /home/mysql/watch/mysql_process.exist ] ;thenecho  "OK"else/etc/init.d/keepalived stop#echo "hahaha" > /tmp/wocaoecho `date` >> /home/mysql/watch/result.txtfi### 其中需要注意的是数据库实例端口号 ###2、部署监控脚本，每10s中执行一次#chmod a+x /home/mysql/watch/check_mysql_process.sh#crontab -e### MySQL HA ###* * * * * /home/mysql/watch/check_mysql_process.sh  >/dev/null 2>&1* * * * * sleep 10;/home/mysql/watch/check_mysql_process.sh  >/dev/null 2>&1* * * * * sleep 20;/home/mysql/watch/check_mysql_process.sh  >/dev/null 2>&1* * * * * sleep 30;/home/mysql/watch/check_mysql_process.sh  >/dev/null 2>&1* * * * * sleep 40;/home/mysql/watch/check_mysql_process.sh  >/dev/null 2>&1* * * * * sleep 50;/home/mysql/watch/check_mysql_process.sh  >/dev/null 2>&1