CENTOS中如何利用Keepalived构建双主MySQL+双机热备

系统环境：CentOS 6.3 x64

MySQL版本：mysql-5.6.10

Keepalived版本：keepalived-1.2.7

MySQL-VIP：192.168.7.253

MySQL-master1：192.168.7.201

MySQL-master2：192.168.7.249

首先关闭iptables和SELINUX

# service iptables stop

# setenforce 0

# vi /etc/sysconfig/selinux

---------------

SELINUX=disabled

---------------

注: 若线上需要开启iptables,需加一条规则使keepalived的vrrp通行

# iptables -A INPUT -p vrrp -j ACCEPT

1.在MySQL-master1：192.168.7.201服务器上keepalived安装及配置

编译安装，实际以本机kernel版本为准

# wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz

# tar zxvf keepalived-1.2.7.tar.gz

# cd keepalived-1.2.7

# ./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-279.el6.x86_64

# make && make install

设置keepalived开机启动脚本

# cp /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 on

新建一个配置文件，默认keepalived启动会去/etc/keepalived目录下寻找配置文件

# mkdir /etc/keepalived

# vi /etc/keepalived/keepalived.conf

------------------

global_defs {

notification_email {

lzyangel@126.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.126.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

192.168.7.253

}

}

virtual_server 192.168.7.253 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 192.168.7.201 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

（编辑：佛山站长网）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!