MySQL Connection on Node.JS - mysql

I have a problem when I try to connect to a MySQL database hosted by OVH on NodeJS server. Here is the code :
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'my_ip',
port : '3306',
user : 'my_user',
password : 'my_pass',
connectTimeout : 10000
});
connection.connect(function(err) {
if (err) {
console.error('error connecting: ' + err.stack);
return;
}
console.log('connected');
});
But I get :
error connecting: Error: connect ETIMEDOUT
Everytime, not matter what I do, like changing the timeout, remove the port or anything else. Any idea ? I'm running this on ArchLinux x86_64


I finally found the answer : OVH doesn't allow customers to use their MySQL Database out of their services which means that if you want to run code using MySQL OVH database, you have to run the code into a OVH server.


This looks like a timeout error.
Please try taking the port number out of the quote marks. Hopefully this will fix the issue!
var connection = mysql.createConnection({
host : 'my_ip',
port : 3306,
user : 'my_user',
password : 'my_pass',
connectTimeout : 10000
});

Related

MySQL connection node

I'm running my node app on a linux vps where I have installed apache2 and phpmyadmin. I have my mysql database on the server there which I can connect to user the mysql -uusername -ppassword command, but when running my node app with this code:
const mysql = require('mysql');
const connection = mysql.createConnection({
host : '127.0.0.1',
user : 'root',
password : '*******',
database : 'db_name',
});
connection.connect(function(e) {
if(e) {
console.log('Database didn\'t connect');
} else {
console.log('Database connected successfully');
}
});
It says "database didn't connect". the user, password and db fields are all correct for sure.
When console.log(e) I'm getting:
I'm getting:
error code: 'ER_NOT_SUPPORTED_AUTH_MODE'
errorno: 1251
sqlMessage: 'Client does not support authentication protocol requested by server; consider upgrading MySQL client'.
anybody knows why ?

You can change the connection to use the unix socket or check the mysqld is binding on 0.0.0.0 or on the ip of the ethernet card of the server it's running on.
According to the mysqld version you're using, the option can be "skip-networking" or "bind-address".

mariadb for node.js ER_ACCESS_DENIED_ERROR Access denied for user

I am using the following code to establish connection to a MariaDB 10 server:
var mysql = require('mysql');
var con = mysql.createConnection({
host: "local_ip",
user: "username",
password: "my_password",
port: 3307,
database: "name_of_db",
});
con.connect(function(err) {
if (err) {
return console.error('error: ' + err.message);
}
The SQL-Server is running on a machine within a local network.
The SQL-User is granted connections from all hosts (%).
I am able to establish a connection with a SQL GUI tool, with exact the same user.
Seems to me like a bug inside the mysql node package, anybody encountered such a problem?

Error Connecting MySQL Database with Node.js in Angular Universal. TypeError: Cannot read property 'on' of undefined

I would like to connect to MySQL database through Node.js in my Angular Universal project.
Connection code is simple:
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'localhost',
user : 'root',
password : 'root',
database : 'dbname',
port: '8889'
});
connection.connect(function(err) {
if (err) {
console.log("Error connecting to DB: " + err);
throw err;
}
});
First I am getting the following error:
TypeError: Cannot read property 'on' of undefined
at Protocol._enqueue (/Applications/MAMP/htdocs/Angular2/myproject/node_modules/mysql/lib/protocol/Protocol.js:152:5)
...
Then after several seconds there is the following error:
Error connecting to DB: Error: Connection lost: The server closed the connection.
Advice me please what should be done in this case to fix the issue.
Thanks a lot.

If I change the version for zone.js in package.json to 0.7.4, everything works without problems.

Connect to AWS MySQL database via Node JS

I have an instance on AWS and MySQL database working on it.
I was able to connect to the instance via workbench on my local machine.
However, I am not able to connect to the database via the node js code.
Below is the snippet :
var express = require("express");
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'ec2-52-33-41-xxx.us-west-2.compute.amazonaws.com',
port : 3306,
user : 'ec2-user',
password : 'root',
database : 'FAMILY_GIVING_TREE'
});
var app = express();
connection.connect(function(err){
if(!err) {
console.log("Database is connected ... ");
} else {
console.log("Error connecting database ... ");
}
});
THE ERROR is :
{ [Error: connect ECONNREFUSED 52.33.xx.84:3306]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '52.33.41.84',
port: 3306,
fatal: true }
The node js code is w=not written over the AWS instance, I am writing it on my machine and yes the port 3306 is enabled in security groups.
I get the database connection issue.
Any idea where am I going wrong?
Thanks in advance.

There is a syntax error in your node.js code. Replace port : 3306, with below you are missing the ''
port : '3306',

First, you must do the settings, that make Mysql accessible remotely.
https://mariolurig.com/coding/connect-remotely-mysql-database-amazon-ec2-server/
Second, in my case, I had to use my ec2 public IP address instead of public DNS.
So:
var connection = mysql.createConnection({
host : '52.33.41.xx',
port : '3306',
user : 'remote',
password : 'password',
database : 'FAMILY_GIVING_TREE'
});
Third, keep in mind that 'remote' is the user you grant all privilege on your DB for localhost and '%' (from all IP ).
GoodLuck

Can't connect to localhost database from node.js server

Been having a lot of trouble trying to connect to to my localhost database. I've tried using the mysql and mysql-simple node modules but in both cases I just can't get it to connect.
Here's what I used with the 'mysql' module:
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'localhost',
port : '8000',
user : 'uber',
password : 'pass',
});
connection.connect(function(err) {
if (err) throw err;
console.log('Connection Successful');
});
connection.query('USE someDB', function(err) {
if (err) throw err;
console.log('Query Successful');
});
And here' what I used with the 'mysql-simple' module:
var database = require('mysql-simple');
database.init('uber', 'pass', 'mysql', 'localhost', 8000);
database.querySingle('SELECT Host FROM user', function(err, results) {
if (err) {
console.log('error fetching some active users: ' + err);
return;
}
log('Query Successful');
for (var i = 0; i < results.length; i++)
console.log('got active user ' + results[i]);
}
In both cases, when I run my node.js server, it never logs that its connected. I've tried replacing localhost with '127.0.01' and creating a new user to make sure the password is correct, but to no avail. Why isn't it connecting?
Thanks

It's most likely that networking is turned off, that means that mysql server communicates with clients via UNIX sockets and not via TCP/IP. You can check that out running mysql client and run "status" command. If you see port number there, then your mysql server communicates via TCP/IP, or else you'll see something like "socket pathname…", get the pathname and give it to node.js connection parameters, e.g.
...
socketPath: '/opt/lampp/var/...',
...
Check that out in https://github.com/felixge/node-mysql page (search for "socketPathname")
Hope, that's your problem.

You should use mysql_config to show the path to socket.
This a sample on my MAC
QuyLes-MacBook-Pro:freelancer quyle$ mysql_config
Usage: /Applications/MAMP/Library/bin/mysql_config [OPTIONS]
Options:
--cflags [-I/Applications/MAMP/Library/include -fno-omit-frame-pointer -g -DNDEBUG]
--include [-I/Applications/MAMP/Library/include]
--libs [-L/Applications/MAMP/Library/lib -lmysqlclient -lz]
--libs_r [-L/Applications/MAMP/Library/lib -lmysqlclient_r -lz]
--plugindir [/Applications/MAMP/Library/lib/plugin]
--socket [/Applications/MAMP/tmp/mysql/mysql.sock]
--port [0]
--version [5.5.42]
--libmysqld-libs [-L/Applications/MAMP/Library/lib -lmysqld]
--variable=VAR VAR is one of:
pkgincludedir [/Applications/MAMP/Library/include]
pkglibdir [/Applications/MAMP/Library/lib]
plugindir [/Applications/MAMP/Library/lib/plugin]
and then, you add key socketPath for yourMysqlConnection.
bellow on my sample
MysqlServer: {
adapter: 'sails-mysql',
host: 'localhost',
user: 'root', //optional
password: 'root', //optional
database: 'nodejs', //optional,
socketPath: '/Applications/MAMP/tmp/mysql/mysql.sock'
},

change this
database.init('uber', 'pass', 'mysql', 'localhost', 8000);
to
database.init('uber', 'pass', 'mysql', 'localhost', 3306);
and you should be through

Make sure that MySQL and express are running on the same port.
I had MySQL bundled from XAMPP, that ran on Port 3036.
On setting app.listen to 3036, my code worked. FINALLY!

Try this code it's work for me
var mysql = require('mysql');
var connection = mysql.createConnection(
{
host : 'localhost',
user : 'root',
password : '',
database : 'urdatabase',
}
);
connection.connect();
query = connection.query("SELECT * FROM UrTable;");
query
.on('error', function(err) {
console.log( err );
})
.on('result', function( data ) {
socket.emit('YourData',data);
});
I hope this will be helpful for you

In my case, anything happened, so I solved by generating new GRANTs with a new user for nodejs apps

Its due to the networking is turned off in MySQL configurations.
In Ubuntu 20.04.2 and MySQL 8.x.x(its worked in my case) you can find this settings in
/etc/systemd/system/mysql.service.d/override.conf
there will be a ExecStart key and its have multiple configurations.
Here you can provide --skip-networking as OFF
--skip-networking=OFF
And you have to restart your service
systemctl restart mysql.service
It will allow you to connect localhost