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HomeDatabaseMysql Tutorial[MySQL FAQ]系列 -- 启用GTID & binlog新安装完的MySQL提示无法

问:刚刚新安装的MySQL,提示下面信息,无法登入,怎么回事? [root@imysql mysql]# mysql mysqlERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) 答:数据库已经执行过 mysql_install_db 初始化了,按理说应该没问题。

问:刚刚新安装的MySQL,提示下面信息,无法登入,怎么回事?

[root@imysql mysql]# mysql mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

答:数据库已经执行过 mysql_install_db 初始化了,按理说应该没问题。经过排查,发现 $datadir 的 mysql 数据库目录的权限模式为:

drwx------ 2 mysql root        4096 Jan  9 20:22 mysql

看起来没有问题。检查错误日志,发现一行:

130109 21:04:23 [Warning] Bootstrap mode disables GTIDs. Bootstrap mode should only be used by mysql_install_db which initializes the MySQL data directory and creates system tables.
ERROR: 1785  Updates to non-transactional tables are forbidden when DISABLE_GTID_UNSAFE_STATEMENTS = 1.
130109 21:04:23 [ERROR] Aborting

同时,mysql库下的user表空间文件显示:

-rw-rw---- 1 mysql mysql 10684 Jan  9 20:22 user.frm
-rw-rw---- 1 mysql mysql     0 Jan  9 20:22 user.MYD
-rw-rw---- 1 mysql mysql  1024 Jan  9 20:22 user.MYI

可以看到,user表空间数据文件大小为0。
看起来应该是和启用GTID模式有一定关系了。仔细检查下,发现和GTID相关的选项有:

gtid_mode = ON
binlog_format = mixed
disable-gtid-unsafe-statements = 1
log-bin=binlog

这是因为在启用GTID模式下,如果对非事务表更新时,无法保证事务一致性,因此设置 disable-gtid-unsafe-statements = 1 确保主从数据一致性。

解决方案:
这时候可以将选项 disable-gtid-unsafe-statements 的值修改为 0。也可以同时关闭 GTID 、 binlog 选项,初始化完毕后再打开。

#gtid_mode = ON
#log-bin=binlog

disable-gtid-unsafe-statements = 0

技术相关: 

MySQL基础知识

MySQL FAQ

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