I am trying to connect a MongoDB atlas instance to a nodejs/express server :
const mongoose = require("mongoose");
const dbURI =
"mongodb+srv://(url copied from atlas connect)";
const options = {
useNewUrlParser: true,
dbName: "data"
};
mongoose.connect(dbURI, options).then(
() => {
console.log("Database connection established!");
},
err => {
console.log("Error connecting Database instance due to: ", err);
}
);
But I keep get the following error:
MongoNetworkError: connection 5 to cluster ... 27017 closes at TLSSocket. ...
How can I fix this?
Resolved -- Check IP whitelist!
Related
I am trying to connect to cloud mongo db using mongoose with the connection string
const mongoose = require("mongoose");
mongoose.connect(
"mongodb+srv://<user>:<pass>#<cluster>/<db>?retryWrites=true&w=majority", {
useNewUrlParser: true,
useUnifiedTopology: true
}
).then(res => {
console.log("successful" + res);
})
.catch(err => {
console.log("connection error:", err);
})
module.exports = mongoose;
This works fine on my local machine but when I upload and run it on my production server it doesn't connect.
I have to set it to allow connections from all IPs and I have also add my server IP to it but still it shows me the same error
I can't seem to connect my MongoDB to my Node.js app
This is the error I get when I run mongo status
2020-11-07T16:38:29.570-0500 E QUERY [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect#src/mongo/shell/mongo.js:341:17
This is my app.js code
const MongoClient = require('mongodb').MongoClient
const uri = "mongodb+srv://username:<password>#cluster0.9lxbq.mongodb.net/<MongNode>?retryWrites=true&w=majority";
const client = new MongoClient(uri, { useNewUrlParser: true });
client.connect(err => {
const collection = client.db("MongNode").collection("devices");
// perform actions on the collection object
client.close();
});
I am trying to establish a connection to remote mongo server through ssh tunnel using mongoose
The implementation code is:
import tunnel from 'tunnel-ssh';
const config = {
username: 'username',
Password: 'password',
host: process.env.SSH_SERVER, //192.168.9.104
port: 22,
dstHost: process.env.DESTINATION_SERVER, //192.168.9.104
dstPort: process.env.DESTINATION_PORT, //27017
localHost: '127.0.0.1',
localPort: 27017
};
this is the config that i have created while the connection is as follows:
class DB {
initDB() {
tunnel(config, (error, server) => {
if (error) {
console.log('SSH connection error: ' + error);
}
const url = 'mongodb://' + process.env.MONGO_URL; //localhost:27017/DBname
mongoose.connect(url, { useNewUrlParser: true });
mongoose.plugin(toJson);
mongoose.plugin(setProperties);
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'DB connection error:'));
db.once('open', function() {
console.log('DB connection successful');
});
});
}
}
When the function initDB() is invoked the following error pops up
SSH connection error: ConfigError: host not set
events.js:183
throw er; // Unhandled 'error' event
^
ConfigError: host not set
The host is already set but this error seems to be somewhere in the config part but I doesnt seem to single out to the exact reason
your "host" property at "config" var isn't defined. try using hard coded value instead of env var, if it works it means process can't read env vars which might be caused since you R not importing dotenv module
I tried to connect to mongodb atlas that i've just created, but I got this error :
{ MongoError: failed to connect to server [mongodbarcode-tt80c.mongodb.net:27017] on first connect [MongoError: getaddrinfo ENOTFOUND mongodbarcode-tt80c.mongodb.net mongodbarcode-tt80c.mongodb.net:27017]
here's my code :
import mongoose from 'mongoose';
import config from '../config/index';
mongoose.Promise = global.Promise;
const connectToDb = async () => {
try {
await mongoose.connect(mongodb://test:fakepass#mongodbarcode-tt80c.mongodb.net/test?retryWrites=true, { useMongoClient: true });
console.log('Connected to mongo!!!');
}
catch (err) {
console.log(err);
// logger.error('Could not connect to MongoDB');
}
}
export default connectToDb;
also, i added a whitelist IP address :0.0.0.0/0 to connect from everywhere, but i always get the same error, any suggestions please ?
I stumble upon a curious problem about mongoose connect the mongodb, it generate the detail errors as the following
e:\Mentor_Resources\node\node_twitter_bootstrap>node app
Express server listening on port 3000
Trace: error occure when start to connect dbError: connection closed
at e:\Mentor_Resources\node\node_twitter_bootstrap\server\module\word.js:14:
17
at Connection.open (e:\Mentor_Resources\node\node_twitter_bootstrap\node_mod
ules\mongoose\lib\connection.js:201:5)
at Db.open (e:\Mentor_Resources\node\node_twitter_bootstrap\node_modules\mon
goose\node_modules\mongodb\lib\mongodb\db.js:247:16)
at Server.connect.connectionPool.on.server._serverState (e:\Mentor_Resources
\node\node_twitter_bootstrap\node_modules\mongoose\node_modules\mongodb\lib\mong
odb\connection\server.js:413:7)
at EventEmitter.emit (events.js:115:20)
at connection.on.connectionStatus (e:\Mentor_Resources\node\node_twitter_boo
tstrap\node_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\connect
ion_pool.js:108:15)
at EventEmitter.emit (events.js:91:17)
at Socket.closeHandler (e:\Mentor_Resources\node\node_twitter_bootstrap\node
_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\connection.js:401:
12)
at Socket.EventEmitter.emit (events.js:88:17)
at Socket._destroy.destroyed (net.js:364:10)
the code snippet of mongoose is:
var mongoose = require('mongoose');
mongoose.connect("mongodb://localhost/word-sentence",function(err) {
if(err)
console.trace('error occure when start to connect db' + err);
});
i am sure the mongodb is open, and i restart mongodb for several times,but the error is still exist, so I reboot my Windows XP , and try again the problem disappear,everything is ok, so I want to know why?
This is a common problem when pooled connections in longer running applications return connection closed.
The mongoose documentation recommends adding keepAlive to the options object you pass into the connect function.
Here's an example (you can remove replset if you're not using this),
// include keep alive for closing connections,
// http://tldp.org/HOWTO/TCP-Keepalive-HOWTO/overview.html
var mongoOptions =
{
db: {safe: true},
server: {
socketOptions: {
keepAlive: 1
}
},
replset: {
rs_name: 'myReplSet',
socketOptions: {
keepAlive: 1
}
}
};
mongoose.connect( YOUR_URI, mongoOptions );
mongoose.connection.on('error', function(err) {
console.log('Mongo Error:\n');
console.log(err);
}).on('open', function() {
console.log('Connection opened');
});
mongoose.connect() Is not accepting any callback functions as you have use in your code i.e.your code snippet of mongoose:
var mongoose = require('mongoose');
mongoose.connect("mongodb://localhost/word-sentence",function(err) {
if(err)
console.trace('error occurred, when attempted to connect db. Error: ' + err);
});
So, I recommend you to start with this:
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/word-sentence');
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function callback () {
// yay connected!
});
Again you cannot expect any arguments in the callback from db.open('open', function cb(){})
I suggest to go through these quick start, mongoose docs - enlightens how you can jump into source code if some conflict is found in the docs & mongodb/mongoose close connection