Pymongo Connection with MongoDB atlas - Error 111 Connection refused

Question

I'm setting up a cron job, where it fetches some data from MongoDB atlas in Python3 through Pymongo in Cpanel. I always get a Error 111 Connnection refused.

I using python3.6 and pymongo-3.9.0, Cloud MongoDB-4.0.2

I have tried via SSHtunnel forwarder, but not sure how to give host_ip_addres, where MongoDB is in cluster

class DbConnection():
    def __init__(self):
        self.connectionServer = "mongodb+srv://"
        self.userName = "name"
        self.userPass = "pass"
        self.connectionCluster = "@temp-cluster0-lt2rb.mongodb.net"
        self.connectionDb = "developmentDB"

    def db_connect(self):
        ''' This function is used to connect to remote db with authentication
            Return type --> returns the url string of the db
            parameters--> self
            '''
        try:
            connectionUrl = self.connectionServer + self.userName + ":" + self.userPass + self.connectionCluster + "/test?retryWrites=true&w=majority"
            print(connectionUrl)
            myClient = pymongo.MongoClient(connectionUrl, port=12312)
            db = myClient.test
            print(myClient.test)

I'm expecting it to connect to the MongoDB cluster DB and read/Write the documents through it.

Answer 1

So the comments for the question solved the issue, so i'll just put this here for any future reference

The error can be resulted for must people because of a miss-configuration when moving from a self hosted MongoDB to a Remoted host service (Like MongoDB Atlas)

So, the +srv is DNS Seed List Connection Format .

When switching from port based connection to DNS seed based connection, we should remove any port configuration from our connection string, ie:

class DbConnection():
    def __init__(self):
        self.connectionServer = "mongodb+srv://"
        self.userName = "name"
        self.userPass = "pass"
        self.connectionCluster = "@temp-cluster0-lt2rb.mongodb.net"
        self.connectionDb = "developmentDB"

    def db_connect(self):
        ''' This function is used to connect to remote db with authentication
            Return type --> returns the url string of the db
            parameters--> self
            '''
        try:
            connectionUrl = self.connectionServer + self.userName + ":" + self.userPass + self.connectionCluster + "/test?retryWrites=true&w=majority"
            print(connectionUrl)
            // myClient = pymongo.MongoClient(connectionUrl, port=12312)
            // We remove the PORT 
            myClient = pymongo.MongoClient(connectionUrl)
            db = myClient.test
            print(myClient.test)