L3 routed networks - network.j2 (2/3)

Add parameters for the subnets of each network in network_data
yaml. Associates the base subnet of each network with the first
segment of the network. (All networks have an implicit first
network segment when they are created.)

Additional segments and subnets defined in the ``subnets`` key
of each composable network is created with subnet to segment
association.

Partial: blueprint tripleo-routed-networks-templates
Change-Id: I53559ed1445f66fa50508ac9898cbec07914b3fc

network/network.j2

@@ -85,6 +85,48 @@ parameters:
       guaranteed to pass through the data path of the segments in the
       {{network.name}} network.
     type: number
+{%- for subnet in network.subnets|default({}) if network.subnets[subnet].enabled|default(true) %}
+  {{network.name}}SubnetCidr_{{subnet}}:
+{%-     if network.ipv6 or ipv6_override %}
+    default: "{{network.subnets[subnet]['ipv6_subnet']|default(network.subnets[subnet]['ip_subnet']|default(""))}}"
+{%-     else %}
+    default: "{{network.subnets[subnet]['ip_subnet']|default("")}}"
+{%-     endif %}
+    description: |
+      Cidr for the {{network.name_lower}} network's {{subnet}} subnet.
+    type: string
+  {{network.name}}AllocationPools_{{subnet}}:
+{%-     if ":" in network.subnets[subnet]['ip_subnet'] or network.ipv6 or ipv6_override %}
+    default: {{network.subnets[subnet]['ipv6_allocation_pools']|default(network.subnets[subnet]['allocation_pools']|default([]))}}
+{%-     else %}
+    default: {{network.subnets[subnet]['allocation_pools']|default([])}}
+{%-     endif %}
+    description: |
+      Ip allocation pool range for the {{network.name_lower}} network's {{subnet}} subnet.
+    type: json
+  {{network.name}}InterfaceDefaultRoute_{{subnet}}:
+{%-     if ":" in network.subnets[subnet]['ip_subnet'] or network.ipv6 or ipv6_override %}
+    default: "{{network.subnets[subnet]['gateway_ipv6']|default(network.subnets[subnet]['gateway_ip']|default([]))}}"
+{%-     else %}
+    default: "{{network.subnets[subnet]['gateway_ip']|default([])}}"
+{%-     endif %}
+    description: |
+       default route for the {{network.name_lower}} network's {{subnet}} subnet.
+    type: string
+  {{network.name}}NetworkVlanID_{{subnet}}:
+    default: {{network.subnets[subnet]['vlan']|default('')}}
+    description: |
+      Vlan ID for the {{network.name_lower}} network's {{subnet}} subnet.
+    type: string
+  {{network.name}}Routes_{{subnet}}:
+    default: {{network.subnets[subnet]['routes']|default([])}}
+    description: >
+      Routes for the {{subnet}} subnet on {{network.name_lower}} network
+      traffic. JSON route e.g. [{'destination':'10.0.0.0/16', 'nexthop':'10.0.0.1'}]
+      Routes are added to the host_routes property on the subnet in neutron
+      when the subnet is created.
+    type: json
+{%- endfor %}
 
 resources:
   {{network.name}}Network:
@@ -114,10 +156,54 @@ resources:
       allocation_pools: {get_param: {{network.name}}AllocationPools}
       gateway_ip: {get_param: {{network.name}}InterfaceDefaultRoute}
       host_routes: {get_param: {{network.name}}Routes}
+{%- if network.subnets|default({}) %}
+      # All networks have an implicit network segment when created, map this subnet to that segment.
+      segment: {get_attr: [{{network.name}}Network, segments, 0, id]}
+{%- endif %}
+{% for subnet in network.subnets|default({}) if network.subnets[subnet].enabled|default(true) %}
+  {{network.name}}Segment_{{subnet}}:
+    type: OS::Neutron::Segment
+    # NOTE(hjensas): Depends-On here to ensure we always create the base subnet
+    #   first. We can only set the segment for existing subnet if there is only
+    #   one segment and only one existing subnet on the network.
+    depends_on: {{network.name}}Subnet
+    properties:
+      name: {{network.name_lower}}_{{subnet}}
+      network: {get_resource: {{network.name}}Network}
+      network_type: flat
+      physical_network: {{network.name_lower}}_{{subnet}}
+  {{network.name}}Subnet_{{subnet}}:
+    type: OS::Neutron::Subnet
+    properties:
+{%- if ":" in network.ip_subnet or network.ipv6 or ipv6_override %}
+      ip_version: 6
+      ipv6_address_mode: {get_param: IPv6AddressMode}
+      ipv6_ra_mode: {get_param: IPv6RAMode}
+{%- else %}
+      enable_dhcp: {get_param: {{network.name}}NetEnableDHCP}
+{%- endif %}
+      cidr: {get_param: {{network.name}}SubnetCidr_{{subnet}}}
+      name: {{subnet}}
+      network: {get_resource: {{network.name}}Network}
+      allocation_pools: {get_param: {{network.name}}AllocationPools_{{subnet}}}
+      gateway_ip: {get_param: {{network.name}}InterfaceDefaultRoute_{{subnet}}}
+      host_routes: {get_param: {{network.name}}Routes_{{subnet}}}
+      segment: {get_resource: {{network.name}}Segment_{{subnet}}}
+{% endfor %}
 
 outputs:
   OS::stack_id:
     description: {{network.name_lower}} network
     value: {get_resource: {{network.name}}Network}
   subnet_cidr:
+    description: The {{network.name}} networks base subnet in CIDR notation.
     value: {get_attr: [{{network.name}}Subnet, cidr]}
+  subnet_cidrs:
+    description: List of {{network.name}} network's subnets in CIDR notation.
+    value:
+      list_concat:
+      - - {get_attr: [{{network.name}}Subnet, cidr]}
+      -
+{%- for subnet in network.subnets|default({}) if network.subnets[subnet].enabled|default(true) %}
+        - {get_attr: [{{network.name}}Subnet_{{subnet}}, cidr]}
+{%- endfor %}