codeigniter 中的远程数据库连接

Question

I have 2 server A (Code) and B (Database). I need to access (connect) A to B. I am using mysql 5.6 phpmyadmin and php running in ubuntu 14.04. All I know is that i need to whitelist a user in phpmyadmin. Since I am new to this, can anyone guide me on this.. I have made changes in database.php in server A as follow

$active_group = 'default';
$active_record = TRUE;

$db['default']['hostname'] = 'IP of Server B';


$db['default']['username'] = 'abc';
$db['default']['password'] = '123';
$db['default']['database'] = 'db1';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE; 

After doing this change when i run the my server A the following error pops up

Unable to connect to your database server using the provided settings.

Filename: core/Loader.php

Line Number: 338

I have even edited /etc/mysql/my.cnf in server B by binding the server's IP.

bind_ip=[Server B IP]

Answer 1

I can not comment so I'll just add it here, first of all, make sure you can access your database server remotely. Under normal circumstances port 3306 will be blocked.

Answer 2

一旦所有适当的凭证在database.php中给出，我们需要注释掉bind-address=1270.0.1在/etc/mysql/my.cnf服务器B的文件停止MySQL的前，并重新启动一次完成编辑后.