docker machine, swarm, external volumes

// Disable VirtualBox authentication
VBoxManage setproperty websrvauthlibrary null

// Start SOAP service so REX-Ray can talk to VirtualBox from the container host VMs
/Applications/VirtualBox.app/Contents/MacOS/vboxwebsrv -H 0.0.0.0 -v

// Create a Swarm cluster
docker-machine create --driver=virtualbox default
eval $(docker-machine env default)
TOKEN=$(docker run --rm swarm create)
docker-machine create --driver=virtualbox --swarm --swarm-master --swarm-discovery token://$TOKEN manager
docker-machine create --driver=virtualbox --swarm --swarm-discovery token://$TOKEN agent1
docker-machine create --driver=virtualbox --swarm --swarm-discovery token://$TOKEN agent2

// Install REX-Ray
for each in $(echo -e "manager\nagent1\nagent2\n"); do docker-machine ssh $each "curl -sSL https://dl.bintray.com/emccode/rexray/install | sh -s stable" ; done

// Make sure to switch out username with your username! Path is volume directory for storing external volumes.
for each in $(echo -e "manager\nagent1\nagent2\n"); do docker-machine ssh $each "sudo tee -a /etc/rexray/config.yml << EOF
rexray:
  logLevel: debug
  storageDrivers:
  - virtualbox
  volume:
    mount:
      preempt: false
virtualbox:
  endpoint: http://10.0.2.2:18083
  tls: false
  volumePath: /Users/username/VirtualBox Volumes
  controllerName: SATA
" ; done

// Start REX-Ray
for each in $(echo -e "manager\nagent1\nagent2\n"); do docker-machine ssh $each "sudo rexray start" ; done

// Set local Docker instance to use Swarm as endpoint
eval $(docker-machine env --swarm manager)

// Make sure Swarm is working
docker info

// Start container with rescheduling
docker run -tid -e reschedule:on-node-failure --volume-driver=rexray \
  -v postgres1:/var/lib/postgresql/data postgres

// Find the host the container is running on (see first part of container name)
docker ps

// Stop container host
docker-machine stop agent1

// Monitor for stop and restart
docker ps

// Swarm logs can be reviewed for restarts
docker-machine ssh manager
docker logs swarm-agent-master