Master-Slave搭建步骤：
1、在两台主机分别安装MySQL数据库软件
2、在两台主机分别创建并初始化MySQL数据库实例
3、从主库dump数据(库)导入到备库
4、修改主从(Master-Slave)配置
5、主库grant、从库启动复制(start slave)
6、验证主备数据同步

--master:
grant replication slave,replication client on *.* to 'slave'@'192.168.100.81' identified by 'slave';

导出：
flush tables with read lock;

mysql> insert into tony(tid,tdept) values (20001,'ty');
ERROR 1223 (HY000): Can't execute the query because you have a conflicting read lock
mysqldump -uroot -p -E -R -A --databases tyms> /mysql/data/tyms_master.sql

slave导入:
mysql命令行
mysql>source /mysql/data/tyms_master.sql;

--master:
(root@localhost) [(none)]> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000014 | 594 | | ||
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

---slave:
change master to master_host='192.168.100.71', master_user='slave', master_password='slave', master_log_file='mysql-bin.000014', master_log_pos=594;
(root@localhost) [(none)]> change master to master_host='192.168.100.71', master_user='slave', master_password='slave', master_log_file='mysql-bin.000014', master_log_pos=594;
Query OK, 0 rows affected, 2 warnings (0.02 sec)

--master:
unlock tables;

---slave:
mysql> start slave;

[tyms]> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.100.71
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000014
Read_Master_Log_Pos: 3051261
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 3050950
Relay_Master_Log_File: mysql-bin.000014
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: 3051261
Relay_Log_Space: 3051123
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: 1000
Master_UUID: 845f69fa-c558-11e5-9462-000c297b003d
Master_Info_File: /mysql/data/mysqldata/mydata/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
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
1 row in set (0.00 sec)

[tyms]> show binlog events in '/mysql/data/mysqldata/mydata/mysql-bin.000014' from 3051261;

[(none)]> select version();
+------------+
| version() |
+------------+
| 5.6.28-log |
+------------+
1 row in set (0.00 sec)


可以看到：Slave_IO_Running | Slave_SQL_Running两个值都是YES，说明配置成功了。可以在主库里执行DML或者DDL验证下。



如果同步不成功：
1：停掉从库
mysql> slave stop
2：主库上找到日志和位置
mysql> show master status;
(root@localhost) [(none)]> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000014 | 594 | | ||
+------------------+----------+--------------+------------------+-------------------+
3：手动同步
mysql> change master to
> master_host='master_ip',
> master_user='gechong',
> master_password='gechong',
> master_port=3306,
> master_log_file='mysql-bin.000014',
> master_log_pos=594;
1 row in set (0.00 sec)
4：启动从库
mysql> slave start;
1 row in set (0.00 sec)

如果有异常需要可执行跳过：
>slave stop;
>SET GLOBAL sql_slave_skip_counter = 1;
>slave start;

Created by Tony.Tang[TangYun]2016.02
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