MySQL多源复制配置实施步骤

本文主要给大家介绍MySQL多源复制配置实施步骤，文章内容都是笔者用心摘选和编辑的，具有一定的针对性，对大家的参考意义还是比较大的，下面跟笔者一起了解下MySQL多源复制配置实施步骤吧。

多源复制的意义

1.可以在一个从库上对多个云服务器的数据库进行汇总，或者对一个数据库的分库分表进行汇总。

2.集约使用从库云服务器的硬件资源，毕竟弱一个数据库业务量较小确占用整个云服务器资源是不经济的。

3.更方便的对个业务库进行数据备份，优化数据库备份脚本编写逻辑

拓补图

实施步骤

1.备份主库上的数据，考虑到gtid的问题建议只采用mysqldump程序进行备份

centos:#mysqldump --login-path=3306 \ #mysql官方工具都支持login-path快速登录         --single-transaction \ #事务一致性备份，防止备份完整性被事务一致性破坏         --master-data=2 \ #在备份文件的头部加一句change master to pos的注释语句          -A >ip06p3306.sql #备份所有数据库

2.将导出的文件传输到从库的云服务器上

   centos_ip06:#scp ip06p3306.sql root@192.168.1.11:/root/   centos_ip31:#scp ip31p3306.sql root@192.168.1.11:/root/

3.将主库的备份文件导入到从库上

   centos:#mysql --login-path=3306 \             -f 
4.从两份备份文件的头部查看两个主库备份时执行到的GTID
   centos:#less ip06p3306.sql|grep PURGED #得到GTID_ip06   centos:#less ip31p3306.sql|grep PURGED #得到GTID_ip31
5.重新设置从库的GTID（在从库上执行）
   mysql>reset master；   mysql>set global gtid_purged='GTID_ip06,GTID_ip31';
6.将从库的指向各自的主库
      mysql>change master to \                 master_host='192.168.1.6',master_port=3306,\      master_user='repl',master_password='123456', \          master_auto_postion=1 \自动对齐GTID，从库宕机重启后，删除未执行relaylog，重新拉取        for channel 'master_3306';为这个主设定一个频道名，可设为易于辨认的名字
7.设置不方便同步的库：（如会导致复制出重复用户的mysql库）
但sys,performance,information为模式或者视图一样的存在，数据在读取时即时生成，不真正存储数据，可以不过滤
 mysql>stop slave sql_thread;#停止从库的重放进程，比停止整个从库要方便的多    mysql>change replication filter \    replicate_ignore_db=(mysql,db1);\#把复制的库放在括号里，并用,分隔    mysql>start slave sql_thread；
8.查看信息：
mysql> show slave status\G    *************************** 1. row ***************************    Slave_IO_State: Waiting for master to send event    Master_Host: 192.168.1.6    Master_User: repl    Master_Port: 3306    Connect_Retry: 60    Master_Log_File: mysql-bin.000016    Read_Master_Log_Pos: 194    Relay_Log_File: localhost-relay-bin-master_3306.000033    Relay_Log_Pos: 367    Relay_Master_Log_File: mysql-bin.000016    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: 194    Relay_Log_Space: 803    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: 13306    Master_UUID: 449fdd93-1b80-11e7-b054-000c29aa1d65    Master_Info_File: mysql.slave_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: 066c3194-2b4b-11e7-b67b-000c290b6ef0:1-2951823,                         449fdd93-1b80-11e7-b054-000c29aa1d65:1-140,                         efa1d12e-3c56-11e7-a99e-000c29ba498d:1-481    Auto_Position: 1    Replicate_Rewrite_DB:     Channel_Name: master_3306    Master_TLS_Version:       *************************** 2. row ***************************    Slave_IO_State: Waiting for master to send event    Master_Host: 192.168.1.31    Master_User: repl    Master_Port: 3306    Connect_Retry: 60    Master_Log_File: mysql-bin.000026    Read_Master_Log_Pos: 375018221    Relay_Log_File: localhost-relay-bin-master_zabbix.000032    Relay_Log_Pos: 375018394    Relay_Master_Log_File: mysql-bin.000026    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: 375018221    Relay_Log_Space: 375018619    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: 313306    Master_UUID: 066c3194-2b4b-11e7-b67b-000c290b6ef0    Master_Info_File: mysql.slave_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: 066c3194-2b4b-11e7-b67b-000c290b6ef0:2310554-2951823    Executed_Gtid_Set: 066c3194-2b4b-11e7-b67b-000c290b6ef0:1-2951823,              449fdd93-1b80-11e7-b054-000c29aa1d65:1-140,              efa1d12e-3c56-11e7-a99e-000c29ba498d:1-481    Auto_Position: 1    Replicate_Rewrite_DB:     Channel_Name: master_zabbix    Master_TLS_Version:           2 rows in set (0.01 sec)
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