So I got my mongodb instance ready, open for remote connections.
From some reason, I'm unable to connect it with a user/pass without --authenticationDatabase admin added to the connection string.
When I try to perform the connection with the user/pass alone (without "authenticationDatabase", I get:
2015-02-01T16:07:24.818-0500 Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 } at src/mongo/shell/db.js:1210
exception: login failed
This is because the user credentials are stored in the admin database and not in the default database where the mongo shell connects to (test).
You can change this with the connection URL:
With the admin database:
$ mongo localhost/admin --username user -p
MongoDB shell version: 2.6.9
Enter password:
connecting to: localhost/admin
replset:PRIMARY>
Without a specific database (test by default):
$ mongo localhost --username user -p
MongoDB shell version: 2.6.9
Enter password:
connecting to: localhost
2015-04-22T15:34:28.743+0100 Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 } at src/mongo/shell/db.js:1260
exception: login failed
With --authenticationDatabase:
$ mongo localhost --username user --authenticationDatabase admin -p
MongoDB shell version: 2.6.9
Enter password:
connecting to: localhost
replset:PRIMARY>
Note that using --host will not assume the database name is the one after the / (slash:
$ mongo --host localhost/admin --username user -p
MongoDB shell version: 2.6.9
Enter password:
connecting to: localhost/admin:27017/test
2015-04-22T15:37:40.703+0100 starting new replica set monitor for replica set localhost with seeds admin:27017
2015-04-22T15:37:40.703+0100 [ReplicaSetMonitorWatcher] starting
2015-04-22T15:37:40.920+0100 getaddrinfo("admin") failed: nodename nor servname provided, or not known
2015-04-22T15:37:40.922+0100 warning: No primary detected for set localhost
2015-04-22T15:37:40.922+0100 All nodes for set localhost are down. This has happened for 1 checks in a row. Polling will stop after 29 more failed checks
2015-04-22T15:37:40.923+0100 Error: connect failed to replica set localhost/admin:27017 at src/mongo/shell/mongo.js:148
exception: connect failed
Thanks @Gianfranco P.
Briefly: If you want to connect to the database without authenticationDatabase option you should create user in the same database which you want to connect to.
For example
mongodb://demouser:demopass@<host>:<port>/demodb
For this URI you should create your demouser user in demodb database, otherwise you have to provide authenticationDatabase option like this
mongodb://demouser:demopass@<host>:<port>/demodb?authSource=<authDatabase>
