MySQL+keepalived的高可用自动切换实现教程

Keepalived安装配置：

[root@localhost ~]# wget

tar zxf keepalived-1.2.13.tar.gz

cdkeepalived-1.2.13

yum install gcc gcc-c++

yum install kernel-devel -y

[root@localhost keepalived-1.2.13]# ./configure --with-kernel-dir=/usr/src/kernels/2.6.32-696.20.1.el6.x86_64/

&&make && make install

[root@localhost keepalived-1.2.13]# DIR=/usr/local/

[root@localhost keepalived-1.2.13]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

[root@localhost keepalived-1.2.13]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ && mkdir -p /etc/keepalived

[root@localhost keepalived-1.2.13]# cp /usr/local/sbin/keepalived /usr/sbin/

修改Master服务器上keepalived.conf配置如下，vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

[e-mail]

}

notification_email_from [e-mail]

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_DEVEL

}

#VIP1

vrrp_instance VI_1 {

state MASTER

interface eth0

lvs_sync_daemon_inteface eth0

virtual_router_id 151

priority 100

advert_int 5

#nopreempt

authentication {

auth_type PASS

auth_pass 2222

}

virtual_ipaddress {

192.168.227.100

}

}

virtual_server 192.168.227.100 3306 {

delay_loop 6

lb_algo wrr

lb_kind DR

persistence_timeout 60

protocol TCP

real_server 192.168.227.138 3306 {

weight 100

notify_down /data/sh/msyql.sh

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 3306

}

}

}

[root@localhost keepalived]# /etc/init.d/keepalived restart

停止 keepalived： [失败]

正在启动 keepalived： [确定]

[root@localhost keepalived]# /etc/init.d/keepalived restart

停止 keepalived： [确定]

正在启动 keepalived： [确定]

[root@localhost keepalived]# ps -ef |grep keep

root 46101 30792 0 07:57 pts/0 00:00:00 vi keepalived.conf

root 46140 1 0 07:59 00:00:00 keepalived -D

root 46142 46140 0 07:59 00:00:00 keepalived -D

root 46143 46140 0 07:59 00:00:00 keepalived -D

root 46148 30792 0 07:59 pts/0 00:00:00 grep keep

[root@localhost keepalived]# tail -fn100 /var/log/messages

[root@localhost keepalived]# cd

[root@localhost ~]# modprobe ip_vs

[root@localhost ~]# lsmod |grep ip_vs

ip_vs 125694 1

libcrc32c 1246 1 ip_vs

ipv6 334932 294 ip_vs,ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6

[root@localhost ~]# /etc/init.d/keepalived restart

停止 keepalived： [确定]

正在启动 keepalived： [确定]

[root@localhost ~]# tail -fn 10 /var/log/messages

Mysql 从服务器配置keepalived.conf跟master 一样，只需要把Realserver IP修改成

real_server 192.168227.139;优先级从100改为90即可

在master、slave数据库上创建/data/sh/mysql.sh脚本，内容为：

pkill keepalived

然后分别重启两台数据库上keepalive服务即可，最后测试停止master mysql 服务，是否会自动切换

到backup上