主从同步是分布式mysql数据库相当重要的配置，现在我在虚拟机上完成主从配置，系统是CenterOS6.5，mysql版本是5.7.13
主服务器的ip是192.168.19.139 副服务器的ip是192.168.19.142
1.主服务器配置
(1)修改my.cnf(注意使用root)
1 vim /etc/my.cnf 2 3 4 sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 5 log-bin=mysqlbin-log 6 server_id=1 7 basedir=/home/mysql 8 user=mysql 9 datadir=/home/mysql/data 10 port=3306 11 innodb_flush_log_at_trx_commit=1 12 sync_binlog=1 13 log-slave-updates
(2)进入mysql安装目录下的bin，启动mysql
1 cd /home/mysql/bin 2 ./mysqld
(3)重开启mysql客户端，进入mysql安装目录下的bin，授权副服务器主从复制，用mysqld的好处是可以查看错误。
1 ./mysql -uroot -p 2 mysql> grant replication slave on *.* to test@192.168.19.142 identified by '123';
(4)显示主服务器状态
1 mysql> show master status; 2 +---------------------+----------+--------------+------------------+-------------------+ 3 | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | 4 +---------------------+----------+--------------+------------------+-------------------+ 5 | mysqlbin-log.000019 | 1290 | | | | 6 +---------------------+----------+--------------+------------------+-------------------+
2.副服务器配置
(1)修改my.cnf(注意使用root)
1 vim /etc/my.cnf 2 3 sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLE 4 user=mysql 5 server_id = 2 6 replicate-do-db = sbfxd 7 master-info-file = master.info 8 relay-log = relay-relay-bin 9 relay-log-index = relay-relay-bin.index 10 relay-log-info-file=relay-relay-log.info
(2)进入mysql安装目录下的bin，启动mysql
1 cd /home/mysql/bin 2 ./mysqld
(3)重开启mysql客户端，进入mysql安装目录下的bin，设置slave属性并开始服务
1 ./mysql -uroot -p 2 mysql> change master to master_host='192.168.19.139',master_port= 3306, master_log_file='mysqlbin-log.000019', master_log_pos= 1290, master_bind='', master_user='test',master_password='123'; 3 mysql> start slave;
(4)显示副服务器的状态
1 show slave status G; 2 3 Slave_IO_State: Waiting for master to send event 4 Master_Host: 192.168.19.139 5 Master_User: test 6 Master_Port: 3306 7 Connect_Retry: 60 8 Master_Log_File: mysqlbin-log.000019 9 Read_Master_Log_Pos: 1290 10 Relay_Log_File: relay-relay-bin.000002 11 Relay_Log_Pos: 323 12 Relay_Master_Log_File: mysqlbin-log.000019 13 Slave_IO_Running: Yes 14 Slave_SQL_Running: Yes 15 Replicate_Do_DB: sbfxd 16 Replicate_Ignore_DB: 17 Replicate_Do_Table: 18 Replicate_Ignore_Table: 19 Replicate_Wild_Do_Table: 20 Replicate_Wild_Ignore_Table: 21 Last_Errno: 0 22 Last_Error: 23 Skip_Counter: 0 24 Exec_Master_Log_Pos: 1290 25 Relay_Log_Space: 530 26 Until_Condition: None 27 Until_Log_File: 28 Until_Log_Pos: 0 29 Master_SSL_Allowed: No 30 Master_SSL_CA_File: 31 Master_SSL_CA_Path: 32 Master_SSL_Cert: 33 Master_SSL_Cipher: 34 Master_SSL_Key: 35 Seconds_Behind_Master: 0 36 Master_SSL_Verify_Server_Cert: No 37 Last_IO_Errno: 0 38 Last_IO_Error: 39 Last_SQL_Errno: 0 40 Last_SQL_Error: 41 Replicate_Ignore_Server_Ids: 42 Master_Server_Id: 1 43 Master_UUID: 05408021-5ab2-11e6-869b-000c293990c1 44 Master_Info_File: /home/mysql/data/master.info 45 SQL_Delay: 0 46 SQL_Remaining_Delay: NULL 47 Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates 48 Master_Retry_Count: 86400 49 Master_Bind: 50 Last_IO_Error_Timestamp: 51 Last_SQL_Error_Timestamp: 52 Master_SSL_Crl: 53 Master_SSL_Crlpath: 54 Retrieved_Gtid_Set: 55 Executed_Gtid_Set: 56 Auto_Position: 0 57 Replicate_Rewrite_DB: 58 Channel_Name: 59 Master_TLS_Version:
出现两个yes表示slave可以跑了
3.注意事项：
(1)楼主的虚拟机是通过克隆产生的，所以不需要对mysql进行备份，然后在副服务器上恢复，这步对于数据库极其重要，否则就会出现如下错误:
1 2016-08-17T03:11:27.579193Z 5 [ERROR] Slave SQL for channel '': Error executing row event: 'Table 'sbfxd.sbtable' doesn't exist', Error_code: 1146 2 2016-08-17T03:11:27.584268Z 5 [Warning] Slave: Table 'sbfxd.sbtable' doesn't exist Error_code: 1146
(2)如果将主服务器的属性配错了需要stop slave，然后设置好之后start slave