Access MySQL server in private ec2 instance in nodejs

问题

I am new to AWS and Node js. I want to query a MySQL server in a private ec2 instance in a testing project which I am building using Node js. How should I go about it? Thanks

EDIT: I want to access it through my local computer. The way I came up with was:

1. Start a terminal from node js - don't know which method would be best

2. Use the terminal to login into public ec2

3. connect to private ec2 through public instance

4. launch the MySQL client through private instance and query it.

I wanted to know if there is a better way to do this. And any advice on how to achieve the same

回答1:

1. install the package: jm-ez-mysql

   npm install jm-ez-mysql --save

   use this document url: https://www.npmjs.com/package/jm-ez-mysql

2. configuration and connection databse database.js file

   const My = require('jm-ez-mysql');

   // Init DB Connection
   const connection = My.init({
     host: process.env.DBHOST,
     user: process.env.DBUSER,
     password: process.env.DBPASSWORD,
     database: process.env.DATABASE,
     dateStrings: true,
     charset: 'utf8mb4',
     timezone: 'utc',
     multipleStatements: true,
     connectTimeout: 100 * 60 * 1000,
     acquireTimeout: 100 * 60 * 1000,
     timeout: 100 * 60 * 1000,
   });
   
   module.exports = {
     connection,
   };
   

In express js project to configuration database

/config
  /database.js
/server.js
/.env

const http = require('http');
const app = require('express')();
require('./config/database.js');
const bodyParser = require('body-parser');
const server = http.createServer(app);

server.listen(process.env.ServerPort, '0.0.0.0', () => {
  logger.info(`Express server listening on port ${process.env.ServerPort}`);
});

3. server.js file

   const My = require('jm-ez-mysql');

   My.first("psu_project", ["id"], "1=1 ").then(function (r) { console.log(r); });

回答2:

1. Install the package: mysql

   npm install -save mysql

2. Connect MySQL to the server.

Example:

const mysqlConnection = require('mysql').createConnection;

mysqlConnection = mysqlConnection({
        host: HOST,
        user: DB_USER,
        password: DB_PASSWORD,
        database: DB_NAME,
      });
mysqlConnection.connect();

mysqlConnection.query('SELECT * FROM table_name');

NOTE: query() is an asynchronous function.

来源：https://stackoverflow.com/questions/60504692/access-mysql-server-in-private-ec2-instance-in-nodejs