MySQL 5.7 更改数据目录 [英] MySQL 5.7 change datadir
问题描述
我使用 MySQL 5.7 和 CentOS 7.2.
I use MySQL 5.7 and CentOS 7.2.
一开始我在my.cnf中的datadir配置是/var/lib/mysql
At first, my datadir configuration in my.cnf is /var/lib/mysql
现在我想更改数据目录.
Now I want to change datadir.
我有两种方法:
首先，我将/var/lib/mysql 中的所有文件和目录复制到/home/data，然后运行chown -R mysql:mysql/home/data.但是当我运行 systemctl start mysqld 时，我收到错误消息:
First, I copy all files and directories in /var/lib/mysql to /home/data, and run chown -R mysql:mysql /home/data. But when I run systemctl start mysqld, I get error message:
2016-12-08T16:33:38.206780Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2016-12-08T16:33:38.206806Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2016-12-08T16:33:38.206817Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2016-12-08T16:33:38.807398Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2016-12-08T16:33:38.807421Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2016-12-08T16:33:38.807429Z 0 [ERROR] Failed to initialize plugins.
2016-12-08T16:33:38.807436Z 0 [ERROR] Aborting
其次，我将/var/lib/mysql 移动到/home 并在/var/lib 目录中运行 ln -s/home/mysql mysql.当我运行 systemctl start mysqld 时，我收到错误消息:
Second, I move /var/lib/mysql to /home and run ln -s /home/mysql mysql in /var/lib directory. When I run systemctl start mysqld, I get error message:
2016-12-08T16:48:28.958136Z 0 [ERROR] InnoDB: Operating system error number 13 in a file operation.
2016-12-08T16:48:28.958165Z 0 [ERROR] InnoDB: The error means mysqld does not have the access rights to the directory.
2016-12-08T16:48:28.958174Z 0 [ERROR] InnoDB: os_file_get_status() failed on './ibdata1'. Can't determine file permissions
2016-12-08T16:48:28.958184Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2016-12-08T16:48:29.558751Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2016-12-08T16:48:29.558792Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2016-12-08T16:48:29.558806Z 0 [ERROR] Failed to initialize plugins.
2016-12-08T16:48:29.558817Z 0 [ERROR] Aborting
我该如何处理?
推荐答案
这个问题是关于subdir权限的你应该编辑这个文件 /etc/apparmor.d/local/usr.sbin.mysqld<代码>/数据/r,/数据/** rwk，不要忘记，你应该在centos上找到相同的命令，就像这样
this problem is about subdir permission
and you should edit this file /etc/apparmor.d/local/usr.sbin.mysqld
/data/ r,
/data/** rwk,
do not forgot, and you should find same command at centos, like this
sudo service apparmor reload
关于 ubuntu sys 的这个问题，见链接
about this problem at ubuntu sys, and see link
快乐的一天，坏人
这篇关于MySQL 5.7 更改数据目录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
