$ docker swarm join --token SWMTKN-1-1u4oi5o8db4831ipn37cyof8attas3h0xt2bf2y0fdf2my0id5-6xje7khfhupyatgr2ifkb0u1r 192.168.0.37:2377

$ docker service create --replicas 1 --name helloworld alpine ping www.google.com

$ docker service pshelloworld
$ docker service scale helloworld=4
$ docker service pshelloworld
