Question

I have a problem with the connection database MongoDB in Cloud9
Please help to resolve this issue!

var MongoClient = require("mongodb").MongoClient;
var port = process.env.PORT;
var ip   = process.env.IP;
MongoClient.connect("mongodb://"+ip+":"+port+"/test",function(error,db){
        if(!error){
         console.log("We are connected");   
        }
        else{
         console.dir(error); //failed to connect to [127.4.68.129:8080]               
        }
});

Output:

Running Node Process
Your code is running at 'http://demo-project.alfared1991.c9.io'.
Important: use 'process.env.PORT' as the port and 'process.env.IP' as the host in your scripts!
[Error: failed to connect to [127.4.68.129:8080]]

Answer 1

process.env.PORT and process.env.IP are the port and IP address for your application, not your database. You’ll want to pull your Mongo connection string from your MongoDB provider.

Below is the hello world example from the Node.js homepage modified to use the two environment variables.

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(process.env.PORT || 1337, process.env.IP || '127.0.0.1');