MySQL-VIP:192.168.1.200
MySQL-master1:192.168.1.201
MySQL-master2:192.168.1.202
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[root@master ~]
# yum install mysql-server mysql -y
[root@master ~]
# service mysqld start
[root@master ~]
# mysqladmin -u root password 123.com
[root@master ~]
# vi /etc/my.cnf #开启二进制日志,设置id
[mysqld]
server-
id
= 1
#backup这台设置2
log-bin = mysql-bin
binlog-ignore-db = mysql,information_schema
#忽略写入binlog日志的库
auto-increment-increment = 2
#字段变化增量值
auto-increment-offset = 1
#初始字段ID为1
slave-skip-errors = all
#忽略所有复制产生的错误
[root@master ~]
# service mysqld restart
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如果是Centos7,则卸载mariadb,安装mysql,参考文章:http://blog.51cto.com/sf1314/2073389
安装mysql,参考文章:
mysql5.6.37 http://blog.51cto.com/sf1314/2058754
# mysql -uroot -p'密码'
先查看下log bin日志和pos值位置
master配置如下:
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[root@ master ~]
# mysql -u root -p123.com
mysql> GRANT REPLICATION SLAVE ON *.* TO
'replication'
@
'192.168.0.%'
IDENTIFIED BY
'replication'
;
mysql> flush privileges;
mysql> change master to
-> master_host=
'192.168.0.203'
,
-> master_user=
'replication'
,
-> master_password=
'replication'
,
-> master_log_file=
'mysql-bin.000002'
,
-> master_log_pos=106;
#对端状态显示的值
mysql> start slave;
#启动同步
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backup配置如下:
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[root@backup ~]
# mysql -u root -p123.com
mysql> GRANT REPLICATION SLAVE ON *.* TO
'replication'
@
'192.168.0.%'
IDENTIFIED BY
'replication'
;
mysql> flush privileges;
mysql> change master to
-> master_host=
'192.168.0.202'
,
-> master_user=
'replication'
,
-> master_password=
'replication'
,
-> master_log_file=
'mysql-bin.000002'
,
-> master_log_pos=106;
mysql> start slave;
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#主主同步配置完毕,查看同步状态Slave_IO和Slave_SQL是YES说明主主同步成功。
在master插入数据测试下:
在backup查看是否同步成功:
可以看到已经成功同步过去,同样在backup插入到user表数据,一样同步过去,双主就做成功了。
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[root@master ~]
# wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
[root@master ~]
# tar -xf keepalived-1.2.7.tar.gz -C /usr/local/src/
[root@master ~]
# cd /usr/local/
[root@master ~]
# ln -sv /usr/local/src/keepalived-1.2.7/ keepalived #根据实际情况修改
[root@master ~]
# cd keepalived
[root@master ~]
#./configure --prefix=/usr/local/keepalived
make
&&
make
install
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#将keepalived配置成系统服务
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[root@master ~]
# cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/
chmod
+x
/etc/init
.d
/keepalived
[root@master ~]
# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
[root@master ~]
# chkconfig --add keepalived
[root@master ~]
# chkconfig keepalived on
[root@master ~]
# mkdir /etc/keepalived
[root@master ~]
# cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
[root@master ~]
# cp /usr/local/sbin/keepalived /usr/sbin/ #或者ln -s /usr/local/sbin/keepalived /usr/sbin/
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配置keepalived
我们自己在新建一个配置文件,默认情况下keepalived启动时会去/etc/keepalived目录下找配置文件
-
1234567891011121314151617181920212223242526272829303132333435363738394041424344
[root@master ~]
# vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
862572301@qq.com
}
notification_email_from 862572301@qq.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
#标识,双主相同
}
vrrp_instance VI_1 {
state BACKUP
#两台配置此处均是BACKUP
interface eth0
virtual_router_id 51
#主备相同
priority 100
#优先级,另一台backup改为90
advert_int 1
nopreempt
#不抢占,只在优先级高master的机器上设置即可,优先级低backup的机器不设置
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.200
}
}
virtual_server 192.168.1.200 3306 {
delay_loop 2
#每个2秒检查一次real_server状态
#lb_algo wrr #LVS算法,用不到,我们就关闭了
#lb_kind DR #LVS模式,如果不关闭,备用服务器不能通过VIP连接主MySQL
persistence_timeout 60
#会话保持时间,同一IP的连接60秒内被分配到同一台真实服务器
protocol TCP
real_server 192.168.1.201 3306 {
#检测本地mysql,backup也要写检测本地mysql
weight 3
notify_down
/usr/local/keepalived/mysql
.sh
#当mysq服down时,执行此脚本,杀死keepalived实现切换
TCP_CHECK {
connect_timeout 10
#连接超时时间
nb_get_retry 3
#重连次数
delay_before_retry 3
#重连间隔时间
connect_port 3306
#健康检查端口
}
}
}
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编写检测服务down后所要执行的脚本
[root@master ~]
# vi /usr/local/keepalived/mysql.sh
#!/bin/bash
pkill keepalived
[root@master ~]
# chmod +x /usr/local/keepalived/mysql.sh
[root@master ~]
# /etc/init.d/keepalived start
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[root@master ~]
# /usr/local/keepalived/sbin/keepalived –D 或者/etc/init.d/keepalived start
[root@master ~]
# ps -aux | grep keepalived
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附:keepalived-1.2.7 keepalived实现服务高可用 http://down.51cto.com/data/2440924
本文转自 Mr_sheng 51CTO博客,原文链接:http://blog.51cto.com/sf1314/2073383