Getting Error SQLSTATE[HY000] [2002] Connection refused on NAS Synology

Question

I am making an under construction page which is hosted on my Synology NAS.

Visitors can subscribe with their email and get informed when the website will be available.

I have trouble with the database and PHP code that add the email to the database.

If the server name is localhost, I get the following error:

SQLSTATE[HY000] [2002] No such file or directory

When it is 127.0.0.1 or 127.0.0.1:3306, I get the error below:

SQLSTATE[HY000] [2002] Connection refused

I didn't find the solution yet on Stackoverflow.

Here the PHP code:

<?php

$servername = "localhost";
$username   = "id";
$password   = "password";
$dbname     = "dbname";

try {
    $conn = new PDO( "mysql:host=$servername;dbname=$dbname", $username, $password );
    $conn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
    $sql = "INSERT INTO email ( email ) VALUES ( '$email' )";

    $conn->exec( $sql );
    echo "New record created successfully";
}

catch( PDOException $e )
{
    echo $sql . "<br>" . $e->getMessage();
}
$conn = null;

Why am I getting this error?

score 5 · Answer 1 · edited Jan 19 '18 at 07:55

I had the same problem:

SQLSTATE[HY000] [2002] Connection refused

when attempting to connect to the MariaDB database running on my Synology NAS from php. Providing just username and password

$conn = new PDO( "mysql:host=$servername;dbname=$dbname", $username, $password );

didn't work, while specifying the port number, a solution found elsewhere, didn't work either:

$conn = new PDO( "mysql:host=$servername;port=3307;dbname=$dbname", $username, $password );

What does work (for me):

$conn = new PDO("mysql:host=$servername:3307;dbname=$database", $login, $password);

The port name is found when opening the MariaDB 10 properties window from the main menu on the Synology NAS. Apparently, the port=3307 specification does not have any effect, but does not give an error message either.

score 3 · Answer 2 · answered Jul 23 '17 at 08:58

3

I have the answer, the connection was refused because i installed mariaDB on my sinology witch change the default port for MySQL from 3306 to 3307.

answered Jul 23 '17 at 08:58

VâneVâne

141
2
2
5

score 2 · Answer 3 · answered May 27 '20 at 06:15

2

I had the same problem.

I ended up solving it by enabling TCP/IP connection with Port: 3307. You may do that by opening the MariaDB 10 options in the Synology Package Center.

Then instead of: mysqli_connect("127.0.0.1", "root", "", DB_NAME);

I appended a the port number to it as the 5th parameter: mysqli_connect("127.0.0.1", "root", "", DB_NAME, 3307);

answered May 27 '20 at 06:15

Strots

21
2

Thanks useful information. I saw your answer and solved same problem. – Minwoo Kim Jan 02 '21 at 09:59
Note the info about the TCP/IP. Solved my problem, and I haven't found that note anywhere else. – James Jun 06 '21 at 18:12

Ben · Answer 4 · 2021-03-19T08:32:55.053

Just had the same problem and here is how I fixed it. I'm running on DSM 6.2.2-24922 Synology diskstation, i installed webstation with Nginx, PHP 5.6, as well as MariaDB 10 (and phpmyadmin).

The fix I found was to first activate the pdo_mysql extension in the php configuration.

Then go in the Core tab and look for the pdo_mysql.default_socket.

Per default i had

/tmp/mysql.sock

in it but I changed it with

/run/mysqld/mysql10.sock

I found this in the mariadb10 properties. It misteriously worked for me so i hope it will help somebody else as well :)

score 1 · Answer 5 · answered Apr 30 '20 at 20:33

What fixed it for me.

Go to Synology Apps > MariaDB

Ensure 'Enable TCP/IP connection' is enabled above Port 3306.
Note down Domain Socket: /run/mysqld/mysqld10.sock

And as comment above.
In Web Station > PHP Settings > Edit > Core tab Search > socket

Enter domain socket example /run/mysqld/mysqld10.sock into default_sockets

score 0 · Answer 6 · edited Mar 30 '21 at 21:44

I didn't find a synthetic answer but managed to solve my issues with previous answers and other threads.

As a potential memo:

Synology (DSM >=7)
do enable the PHP extensions on: web station > PHP parameters
do enable TCP/IP on: Maria DB > enable
prefer ip address: 127.0.0.1 to localhost;

Here is a test Snippet,

<?PHP
  $dsn = "mysql:host=127.0.0.1:3307;dbname=XXX";
  $username = "XXX";
  $password = "XXXXX";


  try {
      $pdo = new PDO($dsn, $username, $password);
  } catch(PDOException $e) {
    die($e);
  }

  $stmt = $pdo->prepare("SELECT * FROM user WHERE XXX = 'XXX'");
  $stmt->execute();
  while($row = $stmt->fetch()) {
    print_r($row);
  }
 ?>

Getting Error SQLSTATE[HY000] [2002] Connection refused on NAS Synology

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