Cannot get my swarm talking to all nodes.

bash.sh

root@oswarm1:~# docker version
Client version: 1.6.0
Client API version: 1.18
Go version (client): go1.4.2
Git commit (client): 4749651
OS/Arch (client): linux/amd64
Server version: 1.6.0
Server API version: 1.18
Go version (server): go1.4.2
Git commit (server): 4749651
OS/Arch (server): linux/amd64

# All nodes joined like this:
export PRIVATE_IPV4=$(curl -s http://169.254.169.254/metadata/v1/interfaces/private/0/ipv4/address)
export SWARM_TOKEN="swarm-token-went-right-here"
docker run -d swarm join --addr=$PRIVATE_IPV4:4243 token://$SWARM_TOKEN

root@oswarm1:~# docker run --rm swarm list token://$SWARM_TOKEN
10.132.38.99:4243
10.132.38.96:4243
10.132.37.251:4243

root@oswarm1:~# curl -s https://discovery-stage.hub.docker.com/v1/clusters/$SWARM_TOKEN
# ["10.132.38.99:4243","10.132.38.96:4243","10.132.37.251:4243"]

root@oswarm1:~# docker -H tcp://10.132.38.99:4243 ps -a
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                       PORTS               NAMES
fc08910ed660        swarm:latest        "/swarm join --addr="   7 minutes ago       Exited (137) 6 minutes ago                       kickass_pasteur
root@oswarm1:~# docker -H tcp://10.132.38.96:4243 ps -a
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                       PORTS               NAMES
6ec0e493dbad        swarm:latest        "/swarm manage token"   7 minutes ago       Exited (137) 6 minutes ago                       happy_kirch
79e5b96e0bb1        swarm:latest        "/swarm join --addr="   7 minutes ago       Exited (137) 6 minutes ago                       loving_stallman
root@oswarm1:~# docker -H tcp://10.132.37.251:4243 ps -a
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                       PORTS                    NAMES
746b47f6e731        swarm:latest        "/swarm manage token"   6 minutes ago       Up 6 minutes                 0.0.0.0:2375->2375/tcp   adoring_bohr
081dea2fc6ad        swarm:latest        "/swarm join --addr="   9 minutes ago       Exited (137) 6 minutes ago                            compassionate_yalow
0141a46355fb        swarm:latest        "/swarm join --addr="   11 minutes ago      Exited (1) 11 minutes ago                             cocky_sammet

root@oswarm1:~# docker -H tcp://0.0.0.0:2375 info
Containers: 2
Strategy: spread
Filters: affinity, health, constraint, port, dependency
Nodes: 1
 oswarm3: 10.132.38.96:4243
  └ Containers: 2
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.019 GiB

root@oswarm1:~# docker -H tcp://0.0.0.0:2375 ps -a
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                       PORTS               NAMES
6ec0e493dbad        swarm:latest        "/swarm manage token"   6 minutes ago       Exited (137) 5 minutes ago                       oswarm3/happy_kirch
79e5b96e0bb1        swarm:latest        "/swarm join --addr="   6 minutes ago       Exited (137) 5 minutes ago                       oswarm3/loving_stallman