我的 Google Cloud 服务器 HDD 空间已用完。因此，我添加了另一个安装的 HDD，在其中复制了 MySQL 数据的内容 (/var/lib/mysql/*)。更新 my.cnf 后，当我尝试重新启动 MySQL 时，它失败并留下以下错误:
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.
我尝试过 chmod 777 并 chown mysql:mysql 到已安装的文件夹(/var/www/html/DB/)，但结果是相同的。使用chown后，我什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？
我在这里看到了类似的问题，但大多数接受的答案都是重新安装 MySQL。这对我来说不是解决方案。它只是绕过了问题。还有更好的答案吗？
最佳答案
您能否检查一下您是否已设置所有必须在 my.cnf 中更改目录路径的配置文件
还要确保您已更改 mysqld 的配置文件，这意味着您必须更新 AppArmor 配置文件，以便它将获得新目录。
检查此链接 https://blogs.oracle.com/jsmyth/entry/apparmor_and_mysql
我希望这能成功!
关于mysql - Ubuntu MySQL : Job failed to start，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34703570/