Add gateway_ip in OS::Neutron::Subnet

This patch allows to :
  - disable the gateway ip for non routable network
  - use the first ip in the subnet
  - set the correct gateway on the external network

Change-Id: Idc816c782856e93ecd339b3aca2a7f53c1564b1d
Closes-bug: #1588379
Depends-On: I8ea6733fe46902e1baeff4ccfbcd42ecc5a1825f

network/external.yaml

@@ -37,6 +37,10 @@ parameters:
     default: [{'start': '10.0.0.4', 'end': '10.0.0.250'}]
     description: Ip allocation pool range for the external network.
     type: json
+  ExternalInterfaceDefaultRoute:
+    default: '10.0.0.1'
+    description: default route for the external network
+    type: string
 
 resources:
   ExternalNetwork:
@@ -55,6 +59,7 @@ resources:
       name: {get_param: ExternalSubnetName}
       network: {get_resource: ExternalNetwork}
       allocation_pools: {get_param: ExternalAllocationPools}
+      gateway_ip: {get_param: ExternalInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:

network/external_v6.yaml

@@ -42,6 +42,10 @@ parameters:
     default: dhcpv6-stateful
     description: Neutron subnet IPv6 router advertisement mode
     type: string
+  ExternalInterfaceDefaultRoute:
+    default: '2001:db8:fd00:1000::1'
+    description: default route for the external network
+    type: string
 
 resources:
   ExternalNetwork:
@@ -62,6 +66,7 @@ resources:
       name: {get_param: ExternalSubnetName}
       network: {get_resource: ExternalNetwork}
       allocation_pools: {get_param: ExternalAllocationPools}
+      gateway_ip: {get_param: ExternalInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:

network/internal_api.yaml

@@ -55,6 +55,7 @@ resources:
       name: {get_param: InternalApiSubnetName}
       network: {get_resource: InternalApiNetwork}
       allocation_pools: {get_param: InternalApiAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id:

network/internal_api_v6.yaml

@@ -62,6 +62,7 @@ resources:
       name: {get_param: InternalApiSubnetName}
       network: {get_resource: InternalApiNetwork}
       allocation_pools: {get_param: InternalApiAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id:

network/management.yaml

@@ -13,7 +13,7 @@ parameters:
   ManagementNetValueSpecs:
     default: {'provider:physical_network': 'management', 'provider:network_type': 'flat'}
     description: Value specs for the management network.
-    type: json 
+    type: json
   ManagementNetAdminStateUp:
     default: false
     description: The admin state of the network.
@@ -38,6 +38,10 @@ parameters:
     default: [{'start': '10.0.1.4', 'end': '10.0.1.250'}]
     description: Ip allocation pool range for the management network.
     type: json
+  ManagementInterfaceDefaultRoute:
+    default: null
+    description: The default route of the management network.
+    type: string
 
 resources:
   ManagementNetwork:
@@ -56,6 +60,7 @@ resources:
       name: {get_param: ManagementSubnetName}
       network: {get_resource: ManagementNetwork}
       allocation_pools: {get_param: ManagementAllocationPools}
+      gateway_ip: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:

network/storage.yaml

@@ -55,6 +55,7 @@ resources:
       name: {get_param: StorageSubnetName}
       network: {get_resource: StorageNetwork}
       allocation_pools: {get_param: StorageAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id:

network/storage_mgmt.yaml

@@ -55,6 +55,7 @@ resources:
       name: {get_param: StorageMgmtSubnetName}
       network: {get_resource: StorageMgmtNetwork}
       allocation_pools: {get_param: StorageMgmtAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id:

network/storage_mgmt_v6.yaml

@@ -62,6 +62,7 @@ resources:
       name: {get_param: StorageMgmtSubnetName}
       network: {get_resource: StorageMgmtNetwork}
       allocation_pools: {get_param: StorageMgmtAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id:

network/storage_v6.yaml

@@ -62,6 +62,7 @@ resources:
       name: {get_param: StorageSubnetName}
       network: {get_resource: StorageNetwork}
       allocation_pools: {get_param: StorageAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id:

network/tenant.yaml

@@ -55,6 +55,7 @@ resources:
       name: {get_param: TenantSubnetName}
       network: {get_resource: TenantNetwork}
       allocation_pools: {get_param: TenantAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id:

network/tenant_v6.yaml

@@ -62,6 +62,7 @@ resources:
       name: {get_param: TenantSubnetName}
       network: {get_resource: TenantNetwork}
       allocation_pools: {get_param: TenantAllocationPools}
+      gateway_ip: null
 
 outputs:
   OS::stack_id: