Mysql5.6主从复制-基于binlog
MySQL5.6开始主从复制有两种方式：基于日志（binlog）；基于GTID（全局事务标示符）。
此文章是基于日志方式的配置步骤
环境：
master数据库IP：192.168.247.128
slave数据库IP：192.168.247.130
mysql版本：5.6.14
1.修改master配置文件并重启服务：
[mysqld]
server-id=11
binlog-ignore-db=test #不记录binlog
replicate-ignore-db=test #不复制test库的binlog
log-bin=mysql-bin
binlog_cache_size = 1M
binlog_format=mixed
expire_logs_days=3
2.修改slave配置文件并重启服务：
[mysqld]
server-id=22
binlog-do-db = mydb
binlog-ignore-db=test #不记录binlog
replicate-ignore-db=test #不复制test库的binlog
log-bin=mysql-bin
binlog_cache_size = 1M
binlog_format=mixed
expire_logs_days=3
3.在master上建立用于复制的用户
mysql>grant replication slave, replication client on *.* to 'repl'@'192.168.247.130' identified by 'pwd';
4.备份master的数据
方法1：数据前先锁表，保证数据一致性
mysql> FLUSH TABLES WITH READ LOCK;
mysql> SHOW MASTER STATUS;
+—————–+————+—————-+——————–+
|File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+—————–+————+—————-+——————–+
|mysql-bin.000015 | 1273 | | |
+—————–+————+—————-+——————–+
记录文件名和pos号
开始备份数据库
# mysqldump -uroot -p mydb > /tmp/mydb.sql
备份完毕，现在可以解锁数据库表
MySQL> UNLOCK TABLES;
方法2：使用--lock-all-tables和--master-data参数结合，导出数据
# mysqldump -uroot -p --hex-blob --lock-all-tables -R --triggers --databases mydb --master-data=2 --default-character-set='utf8' --quick> /tmp/mydb.sql
5.拷贝备份文件到slave，并导入
#scp /tmp/mydb.sql
#mysql -uroot -p -B mydb </tmp/mydb.sql
6.在slave上同步binlog
mysql>
CHANGE MASTER TO MASTER_HOST='192.168.247.128',MASTER_USER='repl',MASTER_PASSWORD='pwd',MASTER_LOG_FILE='mysql-bin.000015',MASTER_LOG_POS=1273;
CHANGE MASTER TO MASTER_HOST='127.0.0.1',MASTER_USER='repl',MASTER_PASSWORD='P@$$w0rd',MASTER_PORT=5869,MASTER_LOG_FILE='mysql-bin.000001',MASTER_LOG_POS=349;
如果是方法2导出的数据，则通过以下语句查询binlog文件名和pos位置：
# grep -i "CHANGE MASTER TO" /tmp/mydb.sql
--CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000015', MASTER_LOG_POS=1273;
7.开启复制
mysql> START slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
8.查看slave状态
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: 192.168.247.128
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000015
Read_Master_Log_Pos: 1273
Relay_Log_File: DBtest1-relay-bin.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: mysql-bin.000015
Slave_IO_Running: No
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: 1273
Relay_Log_Space: 120
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: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 1593
Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID:
Master_Info_File: /var/lib/mysql/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: 131210 19:04:04
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)
可以看到io进程报错: master and slave have equal MySQL server UUIDs
因为我的虚拟机是在mysql安装好以后克隆的，所以在mysql的数据目录下的auto.cnf文件中的uuid一样，所以导致错误
解决方法：删除slave上的auto.cnf，重启mysql服务会自动生成新的auto.cnf,uuid也会变化。
重启后再次查看正常，插入数据正常。
