通過keepalived搭建MySQL雙主模式的高可用叢集系統

Federico發表於2017-10-17

1. 配置MySQL雙主模式

1.修改my.cnf配置檔案

預設情況下,MySQL的配置檔案是/etc/my.cnf,在配置檔案的[mysqld]段新增如下內容:

server-id=1
log-bin=mysql-bin
relay-log=mysql-relay-bin
  • server-id:是節點標識,主從節點不能相同必須全域性唯一
  • log-bin:表示開啟MySQL日誌功能,"mysql-bin"表示日誌檔案的命名格式
  • relay-log:用來定義relay-log日誌檔案的命名格式
2.登入MySQL,授權伺服器replication許可權及配置從伺服器,注意因為是雙主模式所以所有操作都為雙向操作。

MySQL master授權replication

grant replication slave on *.* to 'Federico'@'192.168.1.2' identified by '123456';
show master status;

MySQL slave指定master伺服器,並檢視當前服務是否主從複製成功

stop slave;
change master to master_host='192.168.1.1',master_user='Federico',master_password='123456',master_port=3306,master_log_file='mysql-bin.000001',master_log_pos=336;
start slave;
show slave status\G

檢視以下兩項引數為yes,證明主從複製設定成功。

             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

注意:以上操作為雙向操作,及互為主從,達到雙主的效果。

3. 配置MySQL資料庫可以遠端登入,即我們的其他服務可以通過vip進行登入
grant all on *.* to'Federico'@'%' identified by '123456';

2.配置keepalived實現MySQL雙主高可用

修改keepalived配置檔案
#keepalived master配置檔案
! Configuration File for keepalived
global_defs {
   router_id HA_MySQL
}
vrrp_script check_mysql {
    script "pkill -0 -x mysqld"  
    interval 2  
    fall 2      
    raise 2   
}
vrrp_instance VI_1 {
    state MASTER
    nopreempt    
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.100   
    }
    track_script {
        check_mysql
    }
}


#keepalived backup配置檔案
! Configuration File for keepalived
global_defs {
   router_id HA_MySQL
}
vrrp_script check_mysql {
    script "pkill -0 -x mysqld"  
    interval 2  
    fall 2      
    raise 2   
}
vrrp_instance VI_1 {
    state BACKUP    
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.100   
    }
    track_script {
        check_mysql
    }
}

3.在MySQL客戶端通過vip登入,檢視是否登入成功

mysql -u Federico -h 192.168.1.100 -p

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