Mongodb: couldn't connect to server controller:27017 at src/mongo/shell/mongo.js:147

[AJNOURI]

When creating Ceilometer database:

mongo --host controller --eval '
db = db.getSiblingDB("ceilometer");
db.addUser({user: "ceilometer",
pwd: MONGODB_PASSWORD,
roles: [ "readWrite", "dbAdmin" ]})'

I got the error:

Error: couldn't connect to server controller:27017 at src/mongo/shell/mongo.js:147

The correct controller IP is configured in mongodb config file
/etc/mongodb.conf

bind_ip = 10.10.10.51

The databse service looks OK:
service mongodb status

mongodb start/running, process 3202

pinging the controller resolves to 127.0.0.1 ??!! A bit strange
ping controller

PING controller (127.0.1.1) 56(84) bytes of data.
64 bytes from controller (127.0.1.1): icmp_seq=1 ttl=64 time=0.045 ms
64 bytes from controller (127.0.1.1): icmp_seq=2 ttl=64 time=0.038 ms
64 bytes from controller (127.0.1.1): icmp_seq=3 ttl=64 time=0.049 ms

[AJNOURI]

Looking at the hosts file

cat /etc/hosts

127.0.0.1 localhost
127.0.1.1 controller

#controller
10.10.10.51 controller
192.168.100.51 controller-api
...

Removed the entry

127.0.1.1 controller

As specified at the documentation:
http://docs.openstack.org/liberty/install-guide-ubuntu/environment-networking-controller.html

Now the database is created.