Let admin list instances in vm_states.DELETED

Command 'nova list --status DELETED' returns nothing at the moment.
Make 'nova list --status DELETED' work and work for admin only.

Fixes LP Bug #1037885

Change-Id: I0bace95df713a767bb17e470e66361e1891e628c

nova/api/openstack/compute/servers.py

@@ -428,6 +428,13 @@ def _get_servers(self, req, is_detail):
                 # No 'changes-since', so we only want non-deleted servers
                 search_opts['deleted'] = False
 
+        if search_opts.get("vm_state") == "deleted":
+            if context.is_admin:
+                search_opts['deleted'] = True
+            else:
+                msg = _("Only administrators may list deleted instances")
+                raise exc.HTTPBadRequest(explanation=msg)
+
         # NOTE(dprince) This prevents computes' get_all() from returning
         # instances from multiple tenants when an admin accounts is used.
         # By default non-admin accounts are always limited to project/user

nova/tests/api/openstack/compute/test_servers.py

@@ -718,6 +718,31 @@ def test_get_servers_invalid_status(self):
                                       use_admin_context=False)
         self.assertRaises(webob.exc.HTTPBadRequest, self.controller.index, req)
 
+    def test_get_servers_deleted_status_as_user(self):
+        req = fakes.HTTPRequest.blank('/v2/fake/servers?status=deleted',
+                                      use_admin_context=False)
+        self.assertRaises(webob.exc.HTTPBadRequest,
+                          self.controller.detail, req)
+
+    def test_get_servers_deleted_status_as_admin(self):
+        server_uuid = str(utils.gen_uuid())
+
+        def fake_get_all(compute_self, context, search_opts=None,
+                         sort_key=None, sort_dir='desc'):
+            self.assertTrue('vm_state' in search_opts)
+            self.assertEqual(search_opts['vm_state'], 'deleted')
+
+            return [fakes.stub_instance(100, uuid=server_uuid)]
+
+        self.stubs.Set(nova.compute.API, 'get_all', fake_get_all)
+
+        req = fakes.HTTPRequest.blank('/v2/fake/servers?status=deleted',
+                                      use_admin_context=True)
+
+        servers = self.controller.detail(req)['servers']
+        self.assertEqual(len(servers), 1)
+        self.assertEqual(servers[0]['id'], server_uuid)
+
     def test_get_servers_allows_name(self):
         server_uuid = str(utils.gen_uuid())