Atlas MongoDB connection

问题

I am trying to connect to Atlas MongoDB with the following URI (provided by mongodb connection string )

    module.exports = {
        mongoURI:'mongodb+srv://<user>:<password>@cluster0-un6sk.mongodb.net/test? 
    retryWrites=true'
    };

    //connect to mongoose
    mongoose
        .connect(db)
        .then( ()=>console.log('mongoDB connected'))
        .catch(err => console.log(err));

I get the following error :

{ MongoNetworkError: connection 3 to cluster0-shard-00-00-un6sk.mongodb.net:27017 closed
    at TLSSocket.<anonymous> (C:\Users\KARTIT Ismail\Desktop\devconnector\node_modules\mongodb-core\lib\connection\connection.js:352:9)
    at Object.onceWrapper (events.js:273:13)
    at TLSSocket.emit (events.js:182:13)
    at _handle.close (net.js:606:12)
    at TCP.done (_tls_wrap.js:386:7)
  name: 'MongoNetworkError',
  errorLabels: [ 'TransientTransactionError' ],
  [Symbol(mongoErrorContextSymbol)]: {} }

回答1:

Make sure you have whitelisted your IP in the Atlas Control panel. You can put 0.0.0.0 to allow access from any host.

Then you can have a connection string like below:

var connectionString= 'mongodb://<username>:<password>@<clustername>/<dbname>?ssl=true&replicaSet=<replica setname>&authSource=admin';

var db = mongoose.connect(connectionString).catch((error) => { console.log(error); });

回答2:

Whitelist the IP address, the best option allows access from any host, I believe everyone had installed mongoose, if not then use this command

npm i mongoose

First copy your application connection string from mongodb.com -> clusters->connect->connect your application

Now chose driver Node.js and version latest, now copy connection string.

Now connection.js

const mongoose = require('mongoose');
const conStr = 'mongodb+srv://lord:<password>@cluster5-eeev8.mongodb.net/test?retryWrites=true&w=majority'

const DB = conStr.replace(
  '<password>',
  myPass
);

const DB = conStr.replace(
  'test',
  myDatabaseName
);
//remember mongoose.connect() return promise
mongoose
  .connect(DB, {
    usedNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
  })
  .then((con) => {
    console.log(con.connection);
    console.log('DB connection successful');
  });

回答3:

In order to connect to Atlas MongoDB you should configure IP whitelist. Go to MongoDB Atlas website, login. Then, from the Clusters view, select the Security tab, then IP Whitelist. You will see an IP address. Click "Edit" Button then "current IP address". Press OK. Then restart your server.

Useful link : https://docs.atlas.mongodb.com/security-whitelist/#add-whitelist-entries