h2 $ docker run -d swarm join --addr=10.194.8.7:2375 token://$CLUSTER_ID
h2 $ docker -H tcp://10.194.12.221:4000 info
Containers: 3
Strategy: spread
Filters: affinity, health, constraint, port, dependency
Nodes: 2
 h2: 10.194.8.7:2375
  └ Containers: 1
  └ Reserved CPUs: 0 / 4
  └ Reserved Memory: 0 B / 3.93 GiB
 h1: 10.194.12.221:2375
  └ Containers: 2
  └ Reserved CPUs: 0 / 4
  └ Reserved Memory: 0 B / 7.907 GiB
