我正在尝试将现有的Wordpress站点移动到两个不同的服务器上，一个使用Apache和主要源代码，另一个只在MYSQL上运行数据库。

wp配置：

define(\'DB_NAME\', \'wp-user\');
define(\'DB_USER\', \'wp-user\');
define(\'DB_PASSWORD\', \'password\');
define(\'DB_HOST\', \'xxx.xxx.xxx.xxx:3306\');
define(\'DB_CHARSET\', \'utf8\');
define(\'DB_COLLATE\', \'\');

我已经在这两台服务器上打开了端口3306，并创建了一个来自Apache服务器地址的新mysql用户。

CREATE USER \'wp-user\'@\'xxx.xxx.xxx.xxx\' IDENTIFIED BY \'password\';
GRANT ALL PRIVILEGES ON wp-db . * TO \'wp-user\'@\'xxx.xxx.xxx.xxx\';
FLUSH PRIVILEGES;

两台服务器运行的MYSQL版本相同。

我得到以下错误地址：

建立数据库连接时出错

编辑：

我的cnf：

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
port = 3306
# skip-external-locking
# skip-networking
# bind-address

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

sudo setenforce 0

sudo setenforce 1

sudo setsebool -P httpd_can_network_connect_db 1
sudo setsebool -P httpd_can_network_connect 1
    

sudo iptables -A INPUT -i eth0 -p tcp --destination-port 3306 -j ACCEPT
sudo firewall-cmd --zone=public --add-port=3306/tcp --permanent
sudo firewall-cmd --reload