MySQL ERROR 1193 (HY000): Unknown system variable 'validate_password_policy'

原因

未开启密码校验插件。

查看设置

查看变量中是否有密码校验。

SHOW VARIABLES LIKE 'validate_password%';

查看插件中是否有校验类插件。

select plugin_name, plugin_status from information_schema.plugins where plugin_name like 'validate%';

返回空集合

mysql> SHOW VARIABLES LIKE 'validate_password%';
Empty set (0.00 sec)

mysql> select plugin_name, plugin_status from information_schema.plugins where plugin_name like 'validate%';
Empty set (0.00 sec)

解决方法

安装插件（在MySQL shell中）

install plugin validate_password soname 'validate_password.so';

查看是否安装成功。

mysql> select plugin_name, plugin_status from information_schema.plugins where plugin_name like 'validate%';
+-------------------+---------------+
| plugin_name       | plugin_status |
+-------------------+---------------+
| validate_password | ACTIVE        |
+-------------------+---------------+
1 row in set (0.01 sec)

查看相关变量。

mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+--------+
| Variable_name                        | Value  |
+--------------------------------------+--------+
| validate_password_check_user_name    | OFF    |
| validate_password_dictionary_file    |        |
| validate_password_length             | 8      |
| validate_password_mixed_case_count   | 1      |
| validate_password_number_count       | 1      |
| validate_password_policy             | MEDIUM |
| validate_password_special_char_count | 1      |
+--------------------------------------+--------+
7 rows in set (0.00 sec)