external_resource.yaml

heat_template_version: ocata

parameters:
  Foo1:
    type: number
    default: 123
  Foo2:
    type: number
    default: 456

resources:
  external_resource:
    type: OS::Mistral::ExternalResource
    properties:
      actions:
        CREATE:
          workflow: create
        UPDATE:
          workflow: update
        DELETE:
          workflow: delete
      input:
        foo1: {get_param: Foo1}
        foo2: {get_param: Foo2}
      replace_on_change_inputs:
        - foo2
      always_update: true

outputs:
  execution_output:
    description: execution output
    value: {get_attr: [external_resource, output]}