MySQL基于binlog的主从同步

Fish_11122024-02-23 11:43

主库配置

1.配置文件,在最后添加一行：server_id=1

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[root@openEuler-node1 my.cnf.d]# vim mysql-server.cnf 
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysql/mysqld.log
pid-file=/run/mysqld/mysqld.pid
server_id=1

2.重启服务

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[root@openEuler-node1 my.cnf.d]# systemctl restart mysqld

3.授权用户：

创建用户并赋予权限

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mysql> create user rep@'192.168.%.%' identified with mysql_native_password by '123456';
mysql> grant replication slave on *.* to rep@'192.168.%.%';

4.查看当前主数据库的状态信息

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mysql> show master status;
+---------------+----------+--------------+------------------+-------------------+
| File          | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000002 |     1230 |              |                  |                   |
+---------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

从库配置：

1.配置文件：在最后一行添加server_id=2

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[root@openEuler-node2 ~]# vim /etc/my.cnf.d/mysql-server.cnf 
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysql/mysqld.log
pid-file=/run/mysqld/mysqld.pid
server_id=2

2.重启服务

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[root@openEuler-node2 ~]# systemctl restart mysqld

3.进入mysql 根据主库填写

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mysql> change master to
    -> master_host='192.168.136.55',
    -> master_user='rep',
    -> master_password='123456',
    -> master_log_file='binlog.000002',
    -> master_log_pos=1230,

4.开启slave 并查看Slave_IO_Running和Slave_SQL_Running是否是yes

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mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> show slave status \G
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

注意如果不是yes 注意报错信息