ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

MySQL version: 5.7.9

For development, using a MySQL server with strong password policy is dosing some matter.
If you set a simply password for someone, you will got an error like this:

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

To change the default password plugin level, we can change the settings at runtime or in config file.

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 (0.01 sec)

The default level is MEDIUM, we can change it to LOW, which will only check the password's length(min: 8 chars).

mysql> SET GLOBAL validate_password_policy=LOW;
Query OK, 0 rows affected (0.00 sec)

Or we can set it in my.cnf file

[mysqld]
validate_password_policy=LOW

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