ACS-Swarm issue at the beginning

### Issue Details

Hello,

after installing the Azure's own ACS-Swarm template today, I ran into the following issue:

```
core@swarm-master-C38B4966-0:~$ env|grep DOCKER
DOCKER_HOST=:2375
core@swarm-master-C38B4966-0:~$ docker info
Containers: 3
Running: 0
Paused: 0
Stopped: 3
Images: 3
Role: primary
Strategy: spread
Filters: health, port, dependency, affinity, constraint
Nodes: 3
swarm-agent-C38B4966000000: 10.0.0.4:2375
└ Status: Healthy
└ Containers: 1
└ Reserved CPUs: 0 / 2
└ Reserved Memory: 0 B / 7.145 GiB
└ Labels: executiondriver=, kernelversion=3.19.0-65-generic, operatingsystem=Ubuntu 14.04.4 LTS, storagedriver=aufs
└ Error: (none)
└ UpdatedAt: 2016-11-15T12:29:11Z
swarm-agent-C38B4966000004: 10.0.0.8:2375
└ Status: Healthy
└ Containers: 1
└ Reserved CPUs: 0 / 2
└ Reserved Memory: 0 B / 7.145 GiB
└ Labels: executiondriver=, kernelversion=3.19.0-65-generic, operatingsystem=Ubuntu 14.04.4 LTS, storagedriver=aufs
└ Error: (none)
└ UpdatedAt: 2016-11-15T12:29:36Z
swarm-agent-C38B4966000006: 10.0.0.10:2375
└ Status: Healthy
└ Containers: 1
└ Reserved CPUs: 0 / 2
└ Reserved Memory: 0 B / 7.145 GiB
└ Labels: executiondriver=, kernelversion=3.19.0-65-generic, operatingsystem=Ubuntu 14.04.4 LTS, storagedriver=aufs
└ Error: (none)
└ UpdatedAt: 2016-11-15T12:29:22Z
Plugins:
Volume:
Network:
Swarm:
NodeID:
Is Manager: false
Node Address:
Security Options:
Kernel Version: 3.19.0-65-generic
Operating System: linux
Architecture: amd64
CPUs: 6
Total Memory: 21.44 GiB
Name: 37465f151045
Docker Root Dir:
Debug Mode (client): false
Debug Mode (server): false
WARNING: No kernel memory limit support
core@swarm-master-C38B4966-0:~$ docker node ls
Error response from daemon: 404 page not found
```

Any idea how to fix this? I believe this should work out-of-the-box. Also, do you think it's possible to automatically set up the environment DOCKER_HOST everywhere? Also, why don't we have docker-machine on those VMs?

Thanks,

Tamas

Locate the Azure ACS-Swarm template and reproduce the reported environment on the generated VMs, starting with the DOCKER_HOST value and the failing docker node ls command. Check whether the template's setup matches the installed Swarm mode and document what must change for docker node ls, global DOCKER_HOST configuration, and docker-machine availability to work as requested.

Written by the indexing model from the issue text.