Use plain routes list for os-volumes instead of stevedore

This patch adds os-volumes 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: Ie76ef6c78cf1d97629cdfa3ffc314a21cd4ddb69

nova/api/openstack/compute/routes.py

@@ -91,6 +91,7 @@ from nova.api.openstack.compute import suspend_server
 from nova.api.openstack.compute import tenant_networks
 from nova.api.openstack.compute import used_limits
 from nova.api.openstack.compute import virtual_interfaces
+from nova.api.openstack.compute import volumes
 from nova.api.openstack import wsgi
 import nova.conf
 
@@ -365,6 +366,10 @@ virtual_interfaces_controller = functools.partial(_create_controller,
     virtual_interfaces.ServerVirtualInterfaceController, [], [])
 
 
+volumes_controller = functools.partial(_create_controller,
+    volumes.VolumeController, [], [])
+
+
 # NOTE(alex_xu): This is structure of this route list as below:
 # (
 #     ('Route path': {
@@ -696,6 +701,17 @@ ROUTE_LIST = (
         'GET': [tenant_networks_controller, 'show'],
         'DELETE': [tenant_networks_controller, 'delete']
     }),
+    ('/os-volumes', {
+        'GET': [volumes_controller, 'index'],
+        'POST': [volumes_controller, 'create'],
+    }),
+    ('/os-volumes/detail', {
+        'GET': [volumes_controller, 'detail'],
+    }),
+    ('/os-volumes/{id}', {
+        'GET': [volumes_controller, 'show'],
+        'DELETE': [volumes_controller, 'delete']
+    }),
     ('/os-volumes_boot', {
         'GET': [server_controller, 'index'],
         'POST': [server_controller, 'create']

nova/api/openstack/compute/volumes.py

@@ -602,10 +602,6 @@ class Volumes(extensions.V21APIExtensionBase):
     def get_resources(self):
         resources = []
 
-        res = extensions.ResourceExtension(
-            ALIAS, VolumeController(), collection_actions={'detail': 'GET'})
-        resources.append(res)
-
         res = extensions.ResourceExtension('os-volume_attachments',
                                            VolumeAttachmentController(),
                                            parent=dict(