主库配置
1.配置文件,在最后添加一行:server_id=1
[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
[root@openEuler-node1 my.cnf.d]# systemctl restart mysqld
3.授权用户:
创建用户并赋予权限
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
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
[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
[root@openEuler-node2 ~]# systemctl restart mysqld
3.进入mysql 根据主库填写
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
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