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CentOS6.5，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)
vim /etc/my.cnf
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
log-bin=mysqlbin-log
server_id=1
basedir=/home/mysql
user=mysql
datadir=/home/mysql/data
port=3306
innodb_flush_log_at_trx_commit=1
sync_binlog=1
log-slave-updates
(2)进入mysql安装目录下的bin，启动mysql
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。
./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
mysql> show master status;
+---------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------------+----------+--------------+------------------+-------------------+
| mysqlbin-log.000019 | 1290 | | | |
+---------------------+----------+--------------+------------------+-------------------+
2.副服务器配置
(1)修改my.cnf(注意使用root)
vim /etc/my.cnf
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLE
user=mysql
server_id = 2
replicate-do-db = sbfxd
master-info-file = master.info
relay-log = relay-relay-bin
relay-log-index = relay-relay-bin.index
relay-log-info-file=relay-relay-log.info
(2)进入mysql安装目录下的bin，启动mysql
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
./mysql -uroot -p
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';
mysql> start slave;
(4)显示副服务器的状态
show slave status \G;
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.19.139
Master_User: test
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysqlbin-log.000019
Read_Master_Log_Pos: 1290
Relay_Log_File: relay-relay-bin.000002
Relay_Log_Pos: 323
Relay_Master_Log_File: mysqlbin-log.000019
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: sbfxd
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: 1290
Relay_Log_Space: 530
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:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 05408021-5ab2-11e6-869b-000c293990c1
Master_Info_File: /home/mysql/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
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: