Mysql localhost!= 127.0.0.1？

Question

$ mysql -u root -h 127.0.0.1 -e 'show tables' created_from_host;
+-----------------------------+
| Tables_in_created_from_host |
+-----------------------------+
| test                        |
+-----------------------------+

$ mysql -u root -h localhost -e 'show tables' created_from_host;
ERROR 1049 (42000): Unknown database 'created_from_host'

$ cat /etc/hosts
127.0.0.1       localhost.localdomain localhost
127.0.0.1       localhost
::1     localhost6.localdomain6 localhost6

怎么会这样？主要问题 - 如何为所有主机上的所有数据库授予root权限？

UPD:

$ mysql -u root -h 127.0.0.1 -pzenoss -e "show grants";
+----------------------------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost                                                                                                              |
+----------------------------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*3715D7F2B0C1D26D72357829DF94B81731174B8C' WITH GRANT OPTION |
| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION                                                                           |
+----------------------------------------------------------------------------------------------------------------------------------------+
$ mysql -u root -h localhost -pzenoss -e "show grants";
+----------------------------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost                                                                                                              |
+----------------------------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*3715D7F2B0C1D26D72357829DF94B81731174B8C' WITH GRANT OPTION |
| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION                                                                           |
+----------------------------------------------------------------------------------------------------------------------------------------+

UPD2:

zends> SHOW GLOBAL VARIABLES LIKE 'skip_networking';
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| skip_networking | OFF   |
+-----------------+-------+
1 row in set (0.00 sec)

zends> SELECT user,host FROM mysql.user WHERE user='root'; 
+------+-----------------------+
| user | host                  |
+------+-----------------------+
| root | 127.0.0.1             |
| root | ::1                   |
| root | localhost             |
| root | localhost.localdomain |
+------+-----------------------+
4 rows in set (0.00 sec)

Answer 1

正如您在此处所看到的,如果在没有主机名或主机名的情况下使用,UNIX mysqld将使用套接字localhost.

所以它有所不同,在GRANT系统中,这种差异变得明显.

Answer 2

我知道这个步骤已经过时了,但很可能没有得到正确回答.

默认情况下,mysql执行名称解析,因此127.0.0.1和localhost将解析相同的名称.但是,您可以在my.cnf中关闭名称解析:

skip-name-resolve = 1

然后本地主机,127.0.0.1会不相同了.因此,您要么保留名称解析,要么限制自己仅在您的授权中使用localhost或仅限于127.0.0.1但是:如果您执行后者,则必须使用这些凭据访问我们的数据库.

Answer 3

通过127.0.0.1登录并执行以下语句:

SHOW GRANTS

你可能会看到类似的东西

GRANT ALL ... 'root'@'127.0.0.1'

我刚刚在本地安装时确认,似乎MySQL不会自动解析主机名.您可以添加另一个授权localhost或仅使用127.0.0.1