mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| testdb |
+--------------------+
mysql> use testdb;
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| user |
+----------------+
mysql> select number,name from user;
+--------+------+
| number | name |
+--------+------+
| 1 | testid |
+--------+------+
---------------------
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，双主配置没有问题。
五、配置keepalived实现双机热备
1.master安装keepalived并配置：
# yum install -y keepalived
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
admin@test.com
}
notification_email_from admin@test.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
}
vrrp_instance VI_1 {
state BACKUP
interface eth0 #根据实际网络接口进行更改
virtual_router_id 51
priority 100 #优先级，master设置为100
advert_int 1
nopreempt #不主动抢占资源，只在master上设置
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.30
}
}
virtual_server 192.168.1.30 3306 {
delay_loop 2
#lb_algo rr
#lb_kind NAT
persistence_timeout 50
protocol TCP
real_server 192.168.1.10 3306 { #检测本地mysql
weight 3
notify_down /tmp/mysql.sh #当mysql服务down时，执行此脚本，杀死keepalived实现切换
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
backup安装keepalived并配置：
# yum install -y keepalived
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
admin@test.com
}
notification_email_from admin@test.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
}