Openstack HEAT condition for resource properties - openstack

Question

"Conditions (..) They can be associated with resources and resource properties in the resources section (..)" - as the official openstack's docs said I can do that. But attached examples do not contains these with "resource properties".
I have my example, when user can set parameter to NOT create port2 AND not attach port2 (because port2 does not exist):
parameters:
global_port2_create:
description: Do you want eth1 (port2)
type: string
default: true
conditions:
create_port2: {equals : [{get_param: global_port2_create}, "true"]}
resources:
node_port1:
type: OS::Neutron::Port
properties:
network_id: {get_param: global_port1_net_id }
fixed_ips:
- subnet_id: {get_param: global_port1_net_id }
- ip_address: {get_param: node_port1_ip }
security_groups: {get_param: global_port1_security_groups_ids}
node_port2:
type: OS::Neutron::Port
condition: create_port2
properties:
network_id: {get_param: global_port_net_id }
fixed_ips:
- subnet_id: {get_param: global_port2_net_id }
- ip_address: {get_param: node5_port2_ip }
security_groups: {get_param: global_port2_security_groups_ids}
node5_server:
type: OS::Nova::Server
depends_on: [ node5_port1, node5_port2 ]
properties:
name: some_name
image: { get_param: global_image }
availability_zone: some_az
networks:
- port: { get_resource: node5_port1 }
- port: { get_resource: node5_port2 } #How to use a condition here?
I know, i can do a ResourceGroup with both ports and iterate them, but I do not want this resolution.
Maybe like this?
networks:
- port: { get_resource: node5_port1 }
- port:
condition: create_port2
get_resource: node5_port2
Anyone have any ideas how to accomplish this?

Answer 1

I had a similar use case and found a solution. However, say goodbye to readability if this was still a concern:
networks: {if: [ "create_port2", [port: { get_resource: node5_port1 }, port: { get_resource: node5_port2 }], [port: { get_resource: node5_port1 }]}
which you can also write:
networks:
if:
- "create_port2"
- [port: { get_resource: node5_port1 }, port: { get_resource: node5_port2 }]
- [port: { get_resource: node5_port1 }]
Or even:
networks:
if:
- "create_port2"
- - port: { get_resource: node5_port1 }
- port: { get_resource: node5_port2 }
- - port: { get_resource: node5_port1 }
Choose your poison!