nodejs application - mongodb connection fails with error "ECONNREFUSED" - node.js

Question

Background Information
I'm playing around with my first nodejs test app that is attempting to connect to a remote mongodb.
Problem:
The connection is failing with the following message:
admin#testdev:~/Documents/nodejs_tests$ sudo nodejs index.js
Server has started.
Request for / received
About to route a request for: /
inside db connect method
Request for /favicon.ico received
About to route a request for: /favicon.ico
inside db connect method
MongoError: connect ECONNREFUSED
null
MongoError: connect ECONNREFUSED
null
Here's the logic to connect:
function connect_nimble() {
console.log("inside db connect method");
MongoClient.connect("mongodb://10.1.1.1:27017/test", function(err,db) {
console.log(err);
console.log(db);
if(!err) {
console.log("booya! Connected to mongo");
return true;
}
});
}
What I've checked so far:
I've made sure that the database server is using port 27017. Here's what I see in the mongodb logs when i restart the database:
admin#mongotest:~$ tail -f /var/log/mongodb/mongod.log
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten]
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] db version v3.0.4
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] git version: 0481c958daeb2969800511e7475dc66986fa9ed5
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.1f 6 Jan 2014
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] build info: Linux ip-10-45-73-23 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] allocator: tcmalloc
2015-07-21T09:52:41.452-0500 I CONTROL [initandlisten] options: { config: "/etc/mongod.conf", net: { bindIp: "127.0.0.1" }, storage: { dbPath: "/var/lib/mongodb" }, systemLog: { destination: "file", logAppend: true, path: "/var/log/mongodb/mongod.log" } }
**2015-07-21T09:52:41.470-0500 I NETWORK [initandlisten] waiting for connections on port 27017**
I've made sure I have a database called "test" by starting "mongo"... and then switching in and out of the test database using the "use test" / "use admin" commands.
I don't believe I have authorization turned on. This is what I have in the mongo.conf file:
# Turn on/off security. Off is currently the default
#noauth = true
#auth = true
And to prove it, in order to get into the test database on the server via command line, I just have to type "mongo" and then by default, I'm in the test database. So I think I can safely assume I don't have any authentication going on.
Just in case, I also checked netstat for the port number:
admin#mongotest:~$ sudo netstat -taupen | grep mongo
tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN 117 6465150 18792mongod
admin#mongotest:~$
I'm currently reading the manual to see if there's anything else I should be checking. I'm also reading through the various stackoverflow posts that are similar, but I haven't found me an answer yet.
Any suggestions?

Answer 1

I can see in your logs that Mongo is listening on 127.0.0.1. This is likely your problem. You will have to change the bind-ip address configuration setting to allow Mongo to listen to specific or all IP addresses. You can find how to do this here: Cannot connect to mongodb using machine ip

Answer 2

Open a terminal.
Type mongod & and check the stacktrace.
This is an example of a failing start
I STORAGE [initandlisten] exception in initAndListen: 29 Data directory /data/db not found., terminating
I NETWORK [initandlisten] shutdown: going to close listening sockets...
I NETWORK [initandlisten] shutdown: going to flush diaglog...
I CONTROL [initandlisten] now exiting
To fix this, Create the folder /data/db
In the terminal, type mkdir /data/db
Type againmongod
It works !!
[initandlisten] ** WARNING: Access control is not enabled for the database.
I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.
I CONTROL [initandlisten]
I CONTROL [initandlisten]
I CONTROL [initandlisten] ** WARNING: soft rlimits too low. Number of files is 256, should be at least 1000