Question

我一直在尝试查找问题，但到目前为止在我的RHEL Server 7.5(Maipo)中未能发现。我的AWS上有一个远程数据库实例（RDS实例）。哪个在同一公共子网中。如果我在上述实例终端中运行mysql -h <remote-db-hostname> -u <username> -p，就可以访问并连接它。

此外，如果我尝试运行sudo telnet <remote-db-hostname> 3306，它将返回成功，并说：“ 已连接到xxxx.xxx。主机”。

已安装yum个软件包：

php-mysql.x86_64 （5.4.16-45.el7）
mariadb.x86_64 （1：5.5.56-2.el7）
mariadb-libs.x86_64 （1：5.5.56-2.el7）
httpd.x86_64 （2.4.6-80.el7_5.1）
httpd-tools.x86_64 （2.4.6-80.el7_5.1）

PHP连接无效

但是当我尝试通过简单的PHP代码进行连接时，它不起作用。它说： 数据库连接错误（2）：无法连接到MySQL。 要么 无法连接主机：无法连接到“ xxxx.eu-west-2.rds.amazonaws.com”（13）上的MySQL服务器

我试图同时使用主机名和端口，没有端口但没有成功。

测试连接文件：

$host = 'remote-db-hostname:3306';  // ofcourse using correct hostname
$user = 'xxxxx';
$pswd = 'xxxxx';

$link = mysql_connect($host, $user, $pswd);
if (!$link) {
    die('Could not connect host: ' . mysql_error());
}
mysql_select_db('my-db-name', $link) or die('could not connect to the specified database');

mysql_close($link);

这是我的/etc/my.cnf文件：

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd

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

#
# include all files from the config directory
#
!includedir /etc/my.cnf.d

注意：/etc/my.cnf.d中有两个文件； 1）client.cnf 2）mysql-clients.cnf

client.cnf

# These two groups are read by the client library
# Use it for options that affect all clients, but not the server

[client]

# This group is not read by mysql client library,
# If you use the same .cnf file for MySQL and MariaDB,
# use it for MariaDB-only client options
[client-mariadb]

mysql-clients.cnf

# These groups are read by MariaDB command-line tools
# Use it for options that affect only one utility
#
[mysql]
[mysql_upgrade]
[mysqladmin]
[mysqlbinlog]
[mysqlcheck]
[mysqldump]
[mysqlimport]
[mysqlshow]
[mysqlslap]

/ etc / selinux / config ：

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=enforcing
# SELINUXTYPE= can take one of three two values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected.
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

RHEL无法通过PHP代码连接MySQL数据库

0 个答案: