Pymongo connection timeout from remote machine

Question

I have a Bitnami MEAN Stack running on AWS EC2. I'm trying to connect from a remote machine using PyMongo.

from pymongo import MongoClient
conn = MongoClient('mongodb://username:[email protected]:27017/dbname')

but I keep getting an error along the lines of pymongo.errors.ConnectionFailure: timed out

I have edited /opt/bitnami/mongodb/mongodb.conf to supposedly allow external connections by commenting out bind_ip = 127.0.0.1 and uncommented bind_ip = 0.0.0.0 and all permutations of commenting/uncommenting those lines.

I've looked over the web for about 90 minutes now trying different things but without luck!

Answer 1

On the mongoDB server, do the port connection test, and make sure the DB service running well. If not, start the service.

telnet ec2blah.us-east-1.compute.amazonaws.com 27017

On the remote machine, do the port connection test, to make sure there is no firewall issue.

telnet ec2blah.us-east-1.compute.amazonaws.com 27017

If you have issue to connect, you need check security groups on this instance.

Click the ec2 instance name --> Description --> view rules, you should see the ports are opened

If not, create a new security group , such as `mongoDB`, tcp port 27017 should be opened for inbound traffic, then assign to that instance. 

You should be fine to connect it now.

Answer 2

At the time of start-up of MongoDB, set the bind_ip argument to ::,0.0.0.0

mongod --bind_ip ::,0.0.0.0

Read more in the docs of MongoDB: IP Binding.