如何连接到远程服务器上的数据库

Question

I have a server, my-website.com, on a shared hodting plan. I created a database on the server. From the webadmin, the db details are :

From phpMyAdmin :

Server: localhost:3306

---

Database server
Server: Localhost via UNIX socket
Server type: Percona Server
Server version: 5.6.39-83.1 - Percona Server (GPL), Release 83.1, Revision da5a1c2923f
Protocol version: 10
User: user@localhost
Server charset: UTF-8 Unicode (utf8)

I try to connect to it via node :

const express = require('express')
const mysql = require('mysql')

const PORT = process.env.PORT || 5000

const app = express();
app.use(express.json());

const courses = [];

/** DB **/


app.get('/api/db_connect', function (req, res) {

    var myConStatus = "undef  conn";

    var con = mysql.createConnection({
        host: "191.181.181.81",  // FAKE
        Port: "3306",
        user: "user@localhost",
        database: "user_test_db",
        password: "password123"
    });

    con.connect(function (err) {
        myConStatus = "Connecting to db";
        if (err) {
            myConStatus = "ERR Conn";
            throw err;
        }

        myConStatus = "Success Connection";
    });

    var sql = "CREATE TABLE customers (name VARCHAR(255), address VARCHAR(255))";
    con.query(sql, function (err, result) {
        myConStatus = "Creating table";

        if (err) {
            myConStatus = "ERR DB TABLE CREATE";
            throw err;
        }
        myConStatus = "Table created";
    });

    res.send(myConStatus);

});

/** END DB **/

This is never successful and no table gets created.

What am I missing?

Answer 1

Not sure if I understand fully, but mySQL can be configured for connections from local processes or from remote. If you are trying to connect remotely to a server that is configured for local it will not connect.

You did not say if you got connections errors or not.

You can configure connections for standard TCP/IP or ssh TCP/IP as opposed to local socket/pipe - which maybe you have done.

See here https://www.percona.com/doc/percona-xtrabackup/LATEST/howtos/enabling_tcp.html and this quote

"Most of the Linux distributions do not enable by default to accept TCP/IP connections from outside in their MySQL or Percona Server packages"

If this is off the mark - just comment me and I will delete.