Keepalived+MariaDB10配置+双主+高可用数据库

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Keepalived+MariaDB10配置双主高可用数据库

OS	RS	子网掩码	路由网关
Centos6.6 MariaDB10 Keepalived	Eth0:192.168.26.210	255.255.252.0	192.168.25.3
	VIP:192.168.27.210	255.255.255.252
Centos6.6 MariaDB10 Keepalived	Eth0:192.168.26.211	255.255.252.0	192.168.25.3
	VIP:192.168.27.210	255.255.255.255
Win7(client)	IP:192.168.26.70	255.255.252.0	192.168.25.3

在两台服务器上分别安装MYSQL:
yum -y install MariaDB （这里略）
安装完后配置双主模型：
编辑配置文件26.210：vim /etc/my.cnf.d/server.cnf
在配置文件中加入以前几个参数设置：
log-bin=mysql-bin
server-id       = 210
relay-log       =relay-bin


编辑配置文件26.211：vim /etc/my.cnf.d/server.cnf
log-bin         =mysql-bin
server-id       = 211
relay-log       = relay-bin


分别启动两台服务器的MYSQL服务：service mysql start
服务器设置双主：
26.210:
mysql
grant replication slave ,replication client on *.* to 'jerry'@'192.168.%.%' identified by 'jerrypass';
change master to master_host='192.168.26.211',master_user='jerrymy',master_password='jerrypass',master_log_file='mysql-bin.000006',master_log_pos=558;
start slave;
show slave status\G;   #查看从状态IO和SQL 运行状态均为YES表示配置成功
26.211:
mysql
grant replication slave ,replication client on *.* to 'jerrymy'@'192.168.%.%' identified by 'jerrypass';
change master to master_host='192.168.26.210',master_user='jerry',master_password='jerrypass',master_log_file='mysql-bin.000007',master_log_pos=540;
start slave;
show slave status\G;    #查看从状态IO和SQL 运行状态均为YES表示配置成功

   

  

显示状态为成功，我们再创建数据库来测试，看看双主是否运行正常。

双主设置成功。
26.210：安装Keepalived

安装报错未安装gcc
yum -y install gcc

yum -y install openssl-devel

安装组件后编译成功：

编辑配置文件：vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived global_defs {
   router_id mysql-ha
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 20
    priority 100
    advert_int 1
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.27.210
    }
}
virtual_server 192.168.27.210 3306 {
    delay_loop 2
    lb_algo rr
    lb_kind DR
    persistence_timeout 60
    protocol TCP
    real_server 192.168.26.210  3306 {
        weight 1
        notify_down /etc/keepalived/mysql.sh
        TCP_CHECK {
connect_port 3306
connect_timeout 3
nb_get_retry 2
delay_before_retry 1
        }
    }

}
保存退出启动Keepalived服务。
service keepalived start

26.211：安装Keepalived。

编辑配置文件26.211： vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived global_defs {
   router_id mysql-ha
}
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 20
    priority 99
    advert_int 1
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.27.210
    }
}
virtual_server 192.168.27.210 3306 {
    delay_loop 2
    lb_algo rr
    lb_kind DR
    persistence_timeout 60
    protocol TCP
    real_server 192.168.26.211  3306 {
        weight 1
        notify_down /etc/keepalived/mysql.sh
        TCP_CHECK {
connect_port 3306
connect_timeout 3
nb_get_retry 2
delay_before_retry 1
        }
    }

}
保存退出启动26.211上的Keepalived
service keepalived start

测试VIP是否可用:ping 192.168.27.210 -t

回到26.210或211都可以 上，创建一个数据库访问测试用户账号密码。

grant all on *.* to 'jerrytest'@'192.168.%.%' identified by 'jerrypass';

下面通过 VIP访问数据库观察访问：

VIP在26.210这台服务器上，因此我们访问的26.210上的数据库。
下面停掉26.210上的MYSQL观察：
首先观察VIP网络出现波动后恢复。

数据库访问成功：

VIP已经转移动26.211服务器上了。

我们再恢复26.210上的MYSQL数据库服务观察。