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HomeDatabaseMysql TutorialMySQL5.6配置同步复制的新方法以及常见问题的解决方法

MySQL5.6新增一种不用设置log_bin文件和log位置的方法,之前我们都需要查看master机器信息(show master status),然后在slave设

MySQL5.6新增一种不用设置log_bin文件和log位置的方法,之前我们都需要查看master机器信息(show master status),然后在slave设置

master_host='10.163.213.228',master_user='repl',master_password='sangfordb',master_log_file='mysql-bin.000015',master_log_pos=193952;

使用mysql5.6后可以不用这种方法配置了,只要设置my.cnf文件

log-bin=mysql-bin

binlog_format=row

log_slave_updates

gtid-mode=ON

enforce-gtid-consistency=ON

然后在slave中设置:

change master to

master_host='masterip',master_user='replicationuser',master_password='password',master_AUTO_POSITION=1;

其中masterip、replicationuser和password分别对应你master机的信息

常见问题:

1、show slave status中Slave_IO_State: Waiting to reconnect after a failed registration on master

解决方法:

在master上执行

grant replication slave on *.* to 'repl'@'%' identified by 'password';

FLUSH PRIVILEGES;

然后重新stop slave 和start slave就可以

2、show slave status中Slave_IO_Running: No

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.

解决办法:每个库的uuid应该是不一样的,修改auto.cnf文件(在mysql 的data目录下)的uuid:

[auto]

server-uuid=6dcee5be-8cdb-11e2-9408-90e2ba2e2ea6

按照这个16进制格式,随便改下,,重启mysql即可。

3、从库中slave_sql_running为NO

一般在 Last_SQL_Error:项中可以看到报错的语句

Slave_IO_Running:连接到主库,并读取主库的日志到本地,生成本地日志文件

Slave_SQL_Running:读取本地日志文件,并执行日志里的SQL命令。

这时,网上很多会教使用SET global sql_slave_skip_counter=n; 设置,但其实执行这个语句都会报错,因为启动了gtid-mode=ON

解决方法:跳过执行报错的语句

查看show slave status的最后两行:

Retrieved_Gtid_Set表示已经从master中拉取过来的事务;

Executed_Gtid_Set表示已经执行的事务

找到Executed_Gtid_Set中与Retrieved_Gtid_Set  ID一致的记录,如上图ca83d308-2ea5-11e4-b85f-00163e042f50:1-5,表示只执行到第五个事务,就是这个事务报错了,因此跳过这个事务即可。依次执行以下语句:

stop slave;

set gtid_next='ca83d308-2ea5-11e4-b85f-00163e042f50:6';

begin;commit;

set gtid_next="AUTOMATIC";

start slave;

然后再查看show slave status\G

如果看到以下状态即可以了

PS:启动主从备份时,一定要确保主从的数据一致,因为从库遇到任何报错,即使执行update语句时,主库中的一条记录在从库中找不到,都会报导致问题2的出现,从而停止执行slave更新

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Ubuntu 14.04下安装MySQL

《MySQL权威指南(原书第2版)》清晰中文扫描版 PDF

Ubuntu 14.04 LTS 安装 LNMP Nginx\PHP5 (PHP-FPM)\MySQL

Ubuntu 14.04下搭建MySQL主从服务器

Ubuntu 12.04 LTS 构建高可用分布式 MySQL 集群

Ubuntu 12.04下源代码安装MySQL5.6以及Python-MySQLdb

MySQL-5.5.38通用二进制安装

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