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。
【问题】
mysql执行授权设置密码报错：
mysql> grant all on jumpserver.* to 'jumpserver'@'%' identified by 'weakPassword'; ERROR 1819 (HY000): Your password does not satisfy the current policy requirements【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)
转载于:https://www.cnblogs.com/shawhe/p/11295007.html
