volume_docker.yaml

heat_template_version: 2016-10-14

description: >
  A template which provides a volume for Docker storage

parameters:
  size:
    description: >
      size of a cinder volume in GB to allocate to docker for container/image storage
    type: number

resources:
  # Create an external volume to contain the Docker containers and images
  docker_volume:
    type: OS::Cinder::Volume
    properties:
      size: {get_param: size}

outputs:
  volume_id:
    description: ID of the created volume
    value: {get_resource: docker_volume}