我的Google Cloud服务器硬盘空间不足。所以我添加了另一个已安装的HDD，我复制了MySQL数据的内容（/ var / lib / mysql / *）。在我尝试重新启动MySQL时更新my.cnf后，它失败了以下错误：
160110 14:10:40 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use$
160110 14:10:40 [Note] Plugin 'FEDERATED' is disabled.
^G/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
160110 14:10:40 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
160110 14:10:40 InnoDB: The InnoDB memory heap is disabled
160110 14:10:40 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160110 14:10:40 InnoDB: Compressed tables use zlib 1.2.8
160110 14:10:40 InnoDB: Using Linux native AIO
160110 14:10:40 InnoDB: Initializing buffer pool, size = 128.0M
160110 14:10:40 InnoDB: Completed initialization of buffer pool
160110 14:10:40 InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'open'.
InnoDB: Cannot continue operation.
160110 14:10:41 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use$
160110 14:10:41 [Note] Plugin 'FEDERATED' is disabled.
^G/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
160110 14:10:41 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
160110 14:10:41 InnoDB: The InnoDB memory heap is disabled
160110 14:10:41 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160110 14:10:41 InnoDB: Compressed tables use zlib 1.2.8
160110 14:10:41 InnoDB: Using Linux native AIO
160110 14:10:41 InnoDB: Initializing buffer pool, size = 128.0M
160110 14:10:41 InnoDB: Completed initialization of buffer pool
160110 14:10:41 InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'open'.
InnoDB: Cannot continue operation.
160110 14:10:42 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use$
160110 14:10:42 [Note] Plugin 'FEDERATED' is disabled.
^G/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
160110 14:10:42 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
160110 14:10:42 InnoDB: The InnoDB memory heap is disabled
160110 14:10:42 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160110 14:10:42 InnoDB: Compressed tables use zlib 1.2.8
160110 14:10:41 InnoDB: Using Linux native AIO
160110 14:10:41 InnoDB: Initializing buffer pool, size = 128.0M
160110 14:10:41 InnoDB: Completed initialization of buffer pool
160110 14:10:41 InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'open'.
InnoDB: Cannot continue operation.
160110 14:10:42 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use$
160110 14:10:42 [Note] Plugin 'FEDERATED' is disabled.
^G/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
160110 14:10:42 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
160110 14:10:42 InnoDB: The InnoDB memory heap is disabled
160110 14:10:42 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160110 14:10:42 InnoDB: Compressed tables use zlib 1.2.8
160110 14:10:42 InnoDB: Using Linux native AIO
160110 14:10:42 InnoDB: Initializing buffer pool, size = 128.0M
160110 14:10:42 InnoDB: Completed initialization of buffer pool
160110 14:10:42 InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'open'.
InnoDB: Cannot continue operation.
我已尝试chmod 777并将mysql：mysql chown到已挂载的文件夹（/ var / www / html / DB /），但结果相同。使用chown之后，我甚至可以看到所有者现在是mysql。那么为什么MySQL无法访问该文件夹呢？
我在这里看到过类似的问题，但大部分接受的答案都是重新安装MySQL。这对我来说不是解决方案。它只是绕过了这个问题。还有更好的答案吗？
答案 0 :(得分：0)
您是否可以检查是否已将所有配置文件设置为必须在my.cnf中更改目录路径
另外请确保您更改了mysqld的配置文件，这意味着您必须更新AppArmor配置文件，以便获取新目录。
点击此链接https://blogs.oracle.com/jsmyth/entry/apparmor_and_mysql
我希望这会有效!!