Update 2017-05-24:
The previous answer was for an early state of swarm mode. Since then, secret and automatically accepted parameters have been removed and the advert-addr option has been added. This can be done as follows:
docker swarm init \
--advertise-addr $(docker-machine ip node-1)
2377. IP- , IP- . - , , .
:
-, , /etc/hosts. , ip ( loopback ). RC3, , , ip ( , , ).
, , --.