mysql支持远程访问

本地ip为192.0.4.138，远程访问是报错，如下：

ictester@ic-tester:~$ mysql --host 192.0.4.138 -u root -p12345
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 1130 (HY000): Host '192.0.4.133' is not allowed to connect to this MySQL server

需要开启远程权限，

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

上述错误是因为设置的密码太简单了，

mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_length=4;
Query OK, 0 rows affected (0.00 sec)

然后再执行：

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345';
Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

此时远端可以正常访问了

mysql --host 192.0.4.138 -u root -p12345
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.7.27 MySQL Community Server (GPL)

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