Image
  The name or UUID of the base image to customize for the cluster.
Keypair
  The name or UUID of the SSH keypair to load into the cluster nodes.
Flavor
  The nova flavor id to use when launching the cluster. Default: m1.small
Master Flavor
  The nova flavor id to use when launching the master node of the cluster. Default: m1.small
Docker Volume Size
  The size in GB for Docker Volume. Default: 25
Insecure Registry
  The URL of docker registry.