Use plain routes list for extension_info instead of stevedore

This patch adds extension_info 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: I07c5e0dc34042d4f3cea8b1b933b11a624ec9512

nova/api/openstack/compute/extension_info.py

@@ -21,7 +21,6 @@ from nova.api.openstack import wsgi
 from nova import exception
 from nova.policies import extensions as ext_policies
 
-ALIAS = 'extensions'
 LOG = logging.getLogger(__name__)
 
 
@@ -896,24 +895,6 @@ class ExtensionInfoController(wsgi.Controller):
         raise webob.exc.HTTPNotFound()
 
 
-class ExtensionInfo(extensions.V21APIExtensionBase):
-    """Extension information."""
-
-    name = "Extensions"
-    alias = ALIAS
-    version = 1
-
-    def get_resources(self):
-        resources = [
-            extensions.ResourceExtension(
-                ALIAS, ExtensionInfoController(self.extension_info),
-                member_name='extension')]
-        return resources
-
-    def get_controller_extensions(self):
-        return []
-
-
 class LoadedExtensionInfo(object):
     """Keep track of all loaded API extensions."""
 

nova/api/openstack/compute/routes.py

@@ -148,6 +148,10 @@ cloudpipe_controller = functools.partial(
     _create_controller, cloudpipe.CloudpipeController, [], [])
 
 
+extensions_controller = functools.partial(
+    _create_controller, extension_info.ExtensionInfoController, [], [])
+
+
 fixed_ips_controller = functools.partial(_create_controller,
     fixed_ips.FixedIPController, [], [])
 
@@ -396,6 +400,12 @@ volumes_controller = functools.partial(_create_controller,
 ROUTE_LIST = (
     # NOTE: '/os-volumes_boot' is a clone of '/servers'. We may want to
     # deprecate it in the future.
+    ('/extensions', {
+        'GET': [extensions_controller, 'index'],
+    }),
+    ('/extensions/{id}', {
+        'GET': [extensions_controller, 'show'],
+    }),
     ('/flavors', {
         'GET': [flavor_controller, 'index'],
         'POST': [flavor_controller, 'create']

setup.cfg

@@ -72,7 +72,6 @@ wsgi_scripts =
     nova-metadata-wsgi = nova.api.metadata.wsgi:init_application
 
 nova.api.v21.extensions =
-    extension_info = nova.api.openstack.compute.extension_info:ExtensionInfo
     versions = nova.api.openstack.compute.versionsV21:Versions
 
 nova.api.v21.test_extensions =