解决远程连接数据库：Host is not allowed to connect to this MySQL server

远程连接数据时，报以下提示：

Host 'web1' is not allowed to connect to this MySQL server

原因是数据库服务不允许远程登录，没有授权导致，解决方法如下：

登陆mysql数据库：

mysql –uroot –p123456

创建并授权一个专用的数据库wordpress用于存放blog数据：

create database wordpress;

show database like ‘wordpress’;

grant all on worpress.* to worpress@'localhost' identified by '123456';

注：当数据库和php服务不在同一台机器上，可执行如下命令授权

grant all on wordpress.* to wordpress@’192.168.0.%’ identified by ‘123456’;

刷新权限，使得创建的用户生效：

flush privileges;   

查看用户对应的权限：

select user,host from mysql.user where user='wordpress';  

[root@mysql ~]# mysql -uroot -p123456
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.5.32 MySQL Community Server (GPL)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> create database wordpress;
Query OK, 1 row affected (0.00 sec)
mysql> grant all on wordpress.* to wordpress@'192.168.0.%' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host from mysql.user where user='wordpress';
+-----------+-------------+
| user      | host        |
+-----------+-------------+
| wordpress | 192.168.0.% |
+-----------+-------------+
1 row in set (0.00 sec)

测试效果：