http://blog.csdn.net/kuluzs/article/details/51924374
【问题】
有时候,只是为了自己测试,不想密码设置得那么复杂,譬如只想设置root的密码为123456。
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123456');
但是会报错:
- mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123');
- ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
【原因】
原来MySQL5.6.6版本之后增加了密码强度验证插件validate_password,相关参数设置的较为严格。
使用了该插件会检查设置的密码是否符合当前设置的强度规则,若不满足则拒绝设置。影响的语句和函数有:create user,grant,set password,password(),old password。
【解决】
1) 查看mysql全局参数配置
该问题其实与mysql的validate_password_policy的值有关。
查看一下msyql密码相关的几个全局参数:
- mysql> select @@validate_password_policy;
- +----------------------------+
- | @@validate_password_policy |
- +----------------------------+
- | MEDIUM |
- +----------------------------+
- 1 row in set (0.00 sec)
- mysql> SHOW VARIABLES LIKE 'validate_password%';
- +--------------------------------------+--------+
- | Variable_name | Value |
- +--------------------------------------+--------+
- | 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 |
- +--------------------------------------+--------+
- 6 rows in set (0.08 sec)
2)参数解释
validate_password_dictionary_file
插件用于验证密码强度的字典文件路径。
validate_password_length
密码最小长度,参数默认为8,它有最小值的限制,最小值为:validate_password_number_count +
validate_password_special_char_count + (2 *
validate_password_mixed_case_count)
validate_password_mixed_case_count
密码至少要包含的小写字母个数和大写字母个数。
validate_password_number_count
密码至少要包含的数字个数。
validate_password_policy
密码强度检查等级,0/LOW、1/MEDIUM、2/STRONG。有以下取值:
Policy
Tests Performed
0
or LOW Length
1 or MEDIUM Length; numeric, lowercase/uppercase, and special characters
2 or STRONG Length; numeric, lowercase/uppercase, and special characters; dictionary file
默认是1,即MEDIUM,所以刚开始设置的密码必须符合长度,且必须含有数字,小写或大写字母,特殊字符。
validate_password_special_char_count
密码至少要包含的特殊字符数。
3)修改mysql参数配置
- mysql> set global validate_password_policy=0;
- Query OK, 0 rows affected (0.05 sec)
- mysql>
- mysql>
- mysql> set global validate_password_mixed_case_count=0;
- Query OK, 0 rows affected (0.00 sec)
- mysql> set global validate_password_number_count=3;
- Query OK, 0 rows affected (0.00 sec)
- mysql> set global validate_password_special_char_count=0;
- Query OK, 0 rows affected (0.00 sec)
- mysql> set global validate_password_length=3;
- Query OK, 0 rows affected (0.00 sec)
- mysql> SHOW VARIABLES LIKE 'validate_password%';
- +--------------------------------------+-------+
- | Variable_name | Value |
- +--------------------------------------+-------+
- | validate_password_dictionary_file | |
- | validate_password_length | 3 |
- | validate_password_mixed_case_count | 0 |
- | validate_password_number_count | 3 |
- | validate_password_policy | LOW |
- | validate_password_special_char_count | 0 |
- +--------------------------------------+-------+
- 6 rows in set (0.00 sec)
4)修改简单密码:
- mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123');
- Query OK, 0 rows affected, 1 warning (0.00 sec)