keepalived实现mysql双主高可用
一、地址规划
VIP：10.10.0.228
MasterA IP:10.10.0.224
MasterB IP:10.10.0.226
二、mysql双热热备master-master
1、安装mysql(编译或yum安装)
2、配置MasterA,修改配置文件,添加以下内容
# vim /etc/my.cnf
log-bin=mysql-bin
log=/home/mysqld.log
server-id=1
binlog-do-db=data1
auto-increment-increment=2
auto-increment-offset=2
配置MasterB,修改配置文件,添加以下内容
# vim /etc/my.cnf
log-bin=mysql-bin
log=/home/mysqld.log
server-id=2
binlog-do-db=data1
auto-increment-increment=2
auto-increment-offset=2
3、授权用户
MasterA:
mysql> grant replication slave on *.* to [email protected] identified by '123456';
mysql> flush privileges;
MasterB:
mysql> grant replication slave on *.* to [email protected] identified by '123456';
mysql> flush privileges;
4、准备复制
MasterA:
mysql> show master status\G
MasterB:
mysql> show master status\G
5、配置同步
MasterA:
mysql> change master to master_host='10.10.0.226',master_user='user',
master_password='123456',master_log_file='mysql-bin.000010',master_log_pos=106;
MasterB:
mysql> change master to master_host='10.10.0.224',master_user='user',
master_password='123456',master_log_file='mysql-bin.000010',master_log_pos=106;
6、测试验证同步
MasterA:
Mysql>show slave status \G
Slave_IO_Running: Yes 这两个为yes表示正常
Slave_SQL_Running: Yes
Master B:
Mysql>show slave status \G
Slave_IO_Running: Yes 这两个为yes表示正常
Slave_SQL_Running: Yes
Master A:
创建数据库
mysql> create databases data1;
Master B:
mysql> show databases;
可以发现数据库data1
Master B:
在small数据库里创建一张表，T1：
mysql> create table t1 select * from mysql.user;
Master A：
查看data1下面有t1这个表格：
mysql> show tables;
三、配置keepalived实现高可用
MasterA:
# yum install keepalived -y
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_slave
}
vrrp_script check_mysqld {
script "/etc/keepalived/check_slave.sh 127.0.0.1"
interval 2
weight 21
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
check_mysqld
}
virtual_ipaddress {
10.10.0.228/12 dev eth0 label eth0:0
}
}
MasterB:
1、安装keepalived
# yum install keepalived -y
2、配置
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_slave
}
vrrp_script check_mysqld {
script "/etc/keepalived/check_slave.pl 127.0.0.1"
interval 2
weight 21
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 80
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
check_mysqld
}
virtual_ipaddress {
10.10.0.228/12 dev eth0 label eth0:0
}
}
3、在MasterA和MasterB创建监控脚本,监控mysql服务是否启动以及mysql同步是否正常
# vim /etc/keepalived/check_slave.sh
#!/bin/bash
Mysql=$(mysql -N -s -e "select 10")
if [ $? -ne 0 ] || [ "$Mysql" -ne "10" ]
then
service keepalived stop
exit 1
else
SlaveStatus=($(mysql -e "show slave status\G;"|grep "_Behind|_Running"|awk '{print $NF}'))
if [ "$SlaveStatus[0]" = "No" ] || [ "${SlaveStatus[1]}" = "No" ]
then
service keepalived stop
fi
fi
4、启动keepalived
# service keepalived start
可以参考
http://emg2012.blog.51cto.com/3705315/1616393