一、环境描述 主数据库服务器ip:192.168.0.2 从数据库服务器ip:192.168.0.3 主从服务器上的mysql已全新安装,但并为投入生产,所以无数据产生。 二、主从复制配置 1.主数据库服务器master配置 (1)为从服务器slave授权 mysql> grant replication slave on *.* to slave@192.168.0.3 identified by "123"; (2)查看master状态 mysql> show master status; +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000003 | 400 | | | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec) 记下file和position,一会配置slave会用到。(file为mysql日志的文件,position为日志的线索号,从服务器将从这么位置开始复制) 2.从数据库服务器slave配置 (1)修改slave的server id,避免和其他mysql数据库的重复 vi /etc/my.cnf server-id = 2 (2)执行sql语句的同步 mysql> change master to master_host=192.168.0.2, master_user=slave, master_password=123, master_log_file=mysql-bin.000003, master_log_pos=400; (3)启动slave的同步功能 mysql> start slave; (4)查看slave状态 mysql> show slave status G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.0.2 Master_User: slave Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000003 Read_Master_Log_Pos: 548 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 399 Relay_Master_Log_File: mysql-bin.000003 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 548 Relay_Log_Space: 554 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: 1 row in set (0.02 sec)
ERROR: No query specified 注:Slave_IO_Running: Yes Slave_SQL_Running: Yes当IO和SQL这两个进程都是Yes,master和slave就可以进行主从复制了。 三、验证测试 1.在master上创建一个测试表(root用户) mysql> use test mysql> create table tbs (id int); mysql> insert into tbs values(1); 2.在slave上查看是否复制成功(root用户) mysql> use test mysql> show tables;
mysql> select * from tbs; +------+ | id | +------+ | 1 | +------+ 1 row in set (0.00 sec) 显示复制成功!