您必须将MySQL密码策略更改为LOW。

以root用户登录

mysql -u root -p

改变政策

SET GLOBAL validate_password_policy=LOW;

or

SET GLOBAL validate_password_policy=0;

exit

exit

重启MySQL服务

sudo service mysql restart

请将MySQL密码策略修改为Low = 0 / Medium = 1 / High = 2。

SET GLOBAL validate_password_policy=0;
SET GLOBAL validate_password_policy=1;    
SET GLOBAL validate_password_policy=2;

如果你想设置一个空白密码。然后在MySQL客户端运行以下查询:

SET GLOBAL validate_password.check_user_name = No;
SET GLOBAL validate_password.dictionary_file = '';
SET GLOBAL validate_password.length = 0;
SET GLOBAL validate_password.mixed_case_count = 0;
SET GLOBAL validate_password.number_count = 0;
SET GLOBAL validate_password.policy = LOW;
SET GLOBAL validate_password.special_char_count = 0;

输出应该是这样的:

    SHOW VARIABLES LIKE 'validate_password%';

+--------------------------------------+-------+
| Variable_name                        | Value |
+--------------------------------------+-------+
| validate_password.check_user_name    | ON    |
| validate_password.dictionary_file    |       |
| validate_password.length             | 0     |
| validate_password.mixed_case_count   | 0     |
| validate_password.number_count       | 0     |
| validate_password.policy             | LOW   |
| validate_password.special_char_count | 0     |
+--------------------------------------+-------+

然后，您可以使用以下查询更新您的空白密码:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '';

在我的例子中，当有一个错误的引用时，错误就出现了:

GRANT所有database_name。* ' user1 ' @'8.10.12.2';(用户名周围的单引号错误)

vs

GRANT所有database_name。* 'user1'@'8.10.12.2';(正确)

如果mysql托管在aws上，只需卸载插件。从根用户火下面

UNINSTALL PLUGIN validate_password;

对我来说，在ubuntu新安装的mysqld上不起作用，必须添加这个:到/etc/mysql/mysql.conf.d/mysqld.cnf，否则服务器不会启动(猜测插件没有在正确的时间加载，当我只是添加它而没有plugin-load-add指令时)

plugin-load-add=validate_password.so
validate_password_policy=LOW
validate_password_length=8
validate_password_mixed_case_count=0
validate_password_number_count=0
validate_password_special_char_count=0

对于Laravel用户在MySQL 8.0中遇到此问题。x,添加

'modes'=> [
             'ONLY_FULL_GROUP_BY',
             'STRICT_TRANS_TABLES',
             'NO_ZERO_IN_DATE',
             'NO_ZERO_DATE',
             'ERROR_FOR_DIVISION_BY_ZERO',
             'NO_ENGINE_SUBSTITUTION',
            ],

到你的database.php文件如下所示:

// database.php

    'connections' => [

        'mysql' => [
            'driver'      => 'mysql',
            'host'        => env( 'DB_HOST', '127.0.0.1' ),
            'port'        => env( 'DB_PORT', '3306' ),
            'database'    => env( 'DB_DATABASE', 'forge' ),
            'username'    => env( 'DB_USERNAME', 'forge' ),
            'password'    => env( 'DB_PASSWORD', '' ),
            'unix_socket' => env( 'DB_SOCKET', '' ),
            'charset'     => 'utf8mb4',
            'collation'   => 'utf8mb4_unicode_ci',
            'prefix'      => '',
            'strict'      => true,
            'engine'      => null,
            'modes'       => [
                'ONLY_FULL_GROUP_BY',
                'STRICT_TRANS_TABLES',
                'NO_ZERO_IN_DATE',
                'NO_ZERO_DATE',
                'ERROR_FOR_DIVISION_BY_ZERO',
                'NO_ENGINE_SUBSTITUTION',
            ],
        ],
    ],

它帮我解决了问题。