dd external_openstack_lbaas_member_subnet_id variable to external-openstack-cloud-config.j2 (kubernetes-sigs#12267)

Author: voondo

docs/cloud_controllers/openstack.md

@@ -73,6 +73,7 @@ The cloud provider is configured to have Octavia by default in Kubespray.
   external_openstack_lbaas_method: ROUND_ROBIN
   external_openstack_lbaas_provider: amphora
   external_openstack_lbaas_subnet_id: "Neutron subnet ID to create LBaaS VIP"
+  external_openstack_lbaas_member_subnet_id: "Neutron subnet ID on which to create the members of the load balancer"
   external_openstack_lbaas_network_id: "Neutron network ID to create LBaaS VIP"
   external_openstack_lbaas_manage_security_groups: false
   external_openstack_lbaas_create_monitor: false

roles/kubernetes-apps/external_cloud_controller/openstack/defaults/main.yml

@@ -24,3 +24,5 @@ external_openstack_cloud_controller_extra_args: {}
 external_openstack_cloud_controller_image_tag: "v1.32.0"
 external_openstack_cloud_controller_bind_address: 127.0.0.1
 external_openstack_cloud_controller_dns_policy: ClusterFirst
+
+external_openstack_lbaas_member_subnet_id: "{{ external_openstack_lbaas_subnet_id }}"

roles/kubernetes-apps/external_cloud_controller/openstack/templates/external-openstack-cloud-config.j2

@@ -45,6 +45,7 @@ lb-provider={{ external_openstack_lbaas_provider }}
 {% endif %}
 {% if external_openstack_lbaas_subnet_id is defined %}
 subnet-id={{ external_openstack_lbaas_subnet_id }}
+member-subnet-id={{ external_openstack_lbaas_member_subnet_id }}
 {% endif %}
 {% if external_openstack_lbaas_network_id is defined %}
 network-id={{ external_openstack_lbaas_network_id }}