use plain routes list for os-virtual-interfaces

This patch adds os-virtual-interfaces related routes by a plain list,
instead of using stevedore. After all the Nova API endpoints moves to
the plain routes list, the usage of stevedore for API loading will be
removed from Nova.

Partial-implement-blueprint api-no-more-extensions-pike

Change-Id: I47ccef43e41da0a85bff3da71655c33b6fea4fe4

nova/api/openstack/compute/routes.py

@@ -75,6 +75,7 @@ from nova.api.openstack.compute import shelve
 from nova.api.openstack.compute import simple_tenant_usage
 from nova.api.openstack.compute import suspend_server
 from nova.api.openstack.compute import used_limits
+from nova.api.openstack.compute import virtual_interfaces
 from nova.api.openstack import wsgi
 import nova.conf
 
@@ -274,6 +275,10 @@ simple_tenant_usage_controller = functools.partial(_create_controller,
     simple_tenant_usage.SimpleTenantUsageController, [], [])
 
 
+virtual_interfaces_controller = functools.partial(_create_controller,
+    virtual_interfaces.ServerVirtualInterfaceController, [], [])
+
+
 # NOTE(alex_xu): This is structure of this route list as below:
 # (
 #     ('Route path': {
@@ -553,6 +558,9 @@ ROUTE_LIST = (
         'GET': [server_password_controller, 'index'],
         'DELETE': [server_password_controller, 'clear']
     }),
+    ('/servers/{server_id}/os-virtual-interfaces', {
+        'GET': [virtual_interfaces_controller, 'index']
+    }),
     ('/servers/{server_id}/tags', {
         'GET': [server_tags_controller, 'index'],
         'PUT': [server_tags_controller, 'update_all'],

nova/api/openstack/compute/virtual_interfaces.py

@@ -27,9 +27,6 @@ from nova import network
 from nova.policies import virtual_interfaces as vif_policies
 
 
-ALIAS = 'os-virtual-interfaces'
-
-
 def _translate_vif_summary_view(req, vif):
     """Maps keys for VIF summary view."""
     d = {}
@@ -77,25 +74,3 @@ class ServerVirtualInterfaceController(wsgi.Controller):
         """Returns the list of VIFs for a given instance."""
         return self._items(req, server_id,
                            entity_maker=_translate_vif_summary_view)
-
-
-class VirtualInterfaces(extensions.V21APIExtensionBase):
-    """Virtual interface support."""
-
-    name = "VirtualInterfaces"
-    alias = ALIAS
-    version = 1
-
-    def get_resources(self):
-        resources = []
-
-        res = extensions.ResourceExtension(
-            ALIAS,
-            controller=ServerVirtualInterfaceController(),
-            parent=dict(member_name='server', collection_name='servers'))
-        resources.append(res)
-
-        return resources
-
-    def get_controller_extensions(self):
-        return []

setup.cfg

@@ -94,7 +94,6 @@ nova.api.v21.extensions =
     tenant_networks = nova.api.openstack.compute.tenant_networks:TenantNetworks
     user_data = nova.api.openstack.compute.user_data:UserData
     versions = nova.api.openstack.compute.versionsV21:Versions
-    virtual_interfaces = nova.api.openstack.compute.virtual_interfaces:VirtualInterfaces
     volumes = nova.api.openstack.compute.volumes:Volumes
 
 nova.api.v21.test_extensions =