multi_stack.yaml

# http://docs.openstack.org/developer/heat/template_guide/hot_spec.html#heat-template-version
heat_template_version: 2021-04-16


description: >
  This template demonstrates how you can nest stacks. This template reads in
  the basic_server.yaml template and launches two copies of it.


parameters:
  key_name:
    type: string
    description: Name of an existing keypair to enable SSH access to the instance
    constraints:
      - custom_constraint: nova.keypair

  flavor:
    type: string
    description: The Nectar instance flavour the instance should use
    default: m3.xsmall
    constraints:
      - custom_constraint: nova.flavor

  image:
    type: string
    description: ID or name of the image to use for the instance to be created
    default: NeCTAR Ubuntu 22.04 LTS (Jammy) amd64

  availability_zone:
    type: string
    description: The Nectar availability zone to launch in


resources:
  stack_one:
    # https://docs.openstack.org/heat/latest/template_guide/openstack.html#OS::Heat::Stack
    type: OS::Heat::Stack
    properties:
      template: { get_file: basic_server.yaml }
      timeout: 60
      parameters:
        key_name: { get_param: key_name }
        image: { get_param: image }
        flavor: { get_param: flavor }
        availability_zone: { get_param: availability_zone }

  stack_two:
    # https://docs.openstack.org/heat/latest/template_guide/openstack.html#OS::Heat::Stack
    type: OS::Heat::Stack
    properties:
      template: { get_file: basic_server.yaml }
      timeout: 60
      parameters:
        key_name: { get_param: key_name }
        image: { get_param: image }
        flavor: { get_param: flavor }
        availability_zone: { get_param: availability_zone }


outputs:
  stack_one_outputs:
    description: Output of stack_one.
    value: { get_attr: [stack_one, outputs] }

  stack_two_outputs:
    description: Output of stack_two.
    value: { get_attr: [stack_two, outputs] }