A heat template which creates a vm booted from a cinder volume that contains the image

heat_vm_boot_from_volume.yaml

heat_template_version: 2013-05-23

description: >
  A HOT template that holds a VM instance booted from Volume where the image 
  is copied to the volume automatically.  The VM does nothing, it is only created.

parameters:
  key_name:
    type: string
    description: Name of an existing key pair to use for the instance
    constraints:
      - custom_constraint: nova.keypair
        description: Must name a public key (pair) known to Nova
  flavor:
    type: string
    description: Flavor for the instance to be created
    default: m1.small
    constraints:
      - custom_constraint: nova.flavor
        description: Must be a flavor known to Nova
  image:
    type: string
    description: >
      Name or ID of the image to use for the instance.
      You can get the default from
      http://cloud.fedoraproject.org/fedora-20.x86_64.qcow2
      There is also
      http://cloud.fedoraproject.org/fedora-20.i386.qcow2
      Any image should work since this template
      does not ask the VM to do anything.
    constraints:
      - custom_constraint: glance.image
        description: Must identify an image known to Glance
  network:
    type: string
    description: The network for the VM
    default: private
  vol_size:
    type: number
    description: The size of the Cinder volume
    default: 5

resources:
  my_instance:
    type: OS::Nova::Server
    properties:
      key_name: { get_param: key_name }
      block_device_mapping: [{"volume_id": { get_resource: my_vol },
                              "delete_on_termination": false, 
                              "device_name": "vda"}]
      flavor: { get_param: flavor }
      networks: [{network: {get_param: network} }]

  my_vol:
    type: OS::Cinder::Volume
    properties:
      size: { get_param: vol_size }
      image: { get_param: image }

outputs:
  instance_networks:
    description: The IP addresses of the deployed instance
    value: { get_attr: [my_instance, networks] }