Add restrictions on updated_at when getting instance action records

If ``changes-before`` is less than ``changes-since`` in requested,
there will get empty data when querying in db, so add the limit of
these parameters. If ``changes-before`` < ``changes-since``, will
be returned 400.

Closes-Bug: #1796009
Change-Id: I44546bc9798708a48a250cc3a21bdbcabe2649e1

api-ref/source/parameters.yaml

@@ -467,6 +467,9 @@ changes_before_instance_action:
     The ``±hh:mm`` value, if included, returns the time zone as an offset from UTC.
     For example, ``2015-08-27T09:49:58-05:00``.
     If you omit the time zone, the UTC time zone is assumed.
+    When both ``changes-since`` and ``changes-before`` are specified,
+    the value of the ``changes-before`` must be later than or equal to
+    the value of the ``changes-since`` otherwise API will return 400.
   in: query
   required: false
   type: string
@@ -524,6 +527,9 @@ changes_since_instance_action:
     The ``±hh:mm`` value, if included, returns the time zone as an offset from UTC.
     For example, ``2015-08-27T09:49:58-05:00``.
     If you omit the time zone, the UTC time zone is assumed.
+    When both ``changes-since`` and ``changes-before`` are specified,
+    the value of the ``changes-since`` must be earlier than or equal to
+    the value of the ``changes-before`` otherwise API will return 400.
   in: query
   required: false
   type: string

nova/api/openstack/compute/instance_actions.py

@@ -110,6 +110,12 @@ class InstanceActionsController(wsgi.Controller):
         if 'changes-before' in search_opts:
             search_opts['changes-before'] = timeutils.parse_isotime(
                 search_opts['changes-before'])
+            changes_since = search_opts.get('changes-since')
+            if (changes_since and search_opts['changes-before'] <
+                    search_opts['changes-since']):
+                msg = _('The value of changes-since must be less than '
+                        'or equal to changes-before.')
+                raise exc.HTTPBadRequest(explanation=msg)
 
         limit, marker = common.get_limit_and_marker(req)
         try:

nova/tests/unit/api/openstack/compute/test_instance_actions.py

@@ -14,7 +14,9 @@
 #    under the License.
 
 import copy
+import datetime
 
+import iso8601
 import mock
 from oslo_policy import policy as oslo_policy
 from oslo_utils.fixture import uuidsentinel as uuids
@@ -30,6 +32,7 @@ from nova import objects
 from nova import policy
 from nova import test
 from nova.tests.unit.api.openstack import fakes
+from nova.tests.unit import fake_instance
 from nova.tests.unit import fake_server_actions
 
 
@@ -340,6 +343,40 @@ class InstanceActionsTestV266(InstanceActionsTestV258):
         self.assertIn('Invalid input for query parameters changes-before',
                       six.text_type(ex))
 
+    @mock.patch('nova.compute.api.InstanceActionAPI.actions_get')
+    @mock.patch('nova.api.openstack.common.get_instance')
+    def test_get_action_with_changes_since_and_changes_before(
+            self, mock_get_instance, mock_action_get):
+        param = 'changes-since=2012-12-05T00:00:00Z&' \
+                'changes-before=2012-12-05T01:00:00Z'
+        req = self._get_http_req_with_version('os-instance-actions?%s' %
+                                              param, use_admin_context=True,
+                                              version=self.wsgi_api_version)
+        instance = fake_instance.fake_instance_obj(req.environ['nova.context'])
+        mock_get_instance.return_value = instance
+
+        self.controller.index(req, FAKE_UUID)
+        filters = {'changes-since': datetime.datetime(
+                       2012, 12, 5, 0, 0, tzinfo=iso8601.iso8601.UTC),
+                   'changes-before': datetime.datetime(
+                       2012, 12, 5, 1, 0, tzinfo=iso8601.iso8601.UTC)}
+        mock_action_get.assert_called_once_with(req.environ['nova.context'],
+                                                instance, limit=1000,
+                                                marker=None,
+                                                filters=filters)
+
+    def test_instance_actions_filters_with_distinct_changes_time_bad_request(
+            self):
+        changes_since = '2018-09-04T05:45:27Z'
+        changes_before = '2018-09-03T05:45:27Z'
+        req = self._get_http_req('os-instance-actions?'
+                                 'changes-since=%s&changes-before=%s' %
+                                 (changes_since, changes_before))
+        ex = self.assertRaises(exc.HTTPBadRequest, self.controller.index,
+                               req, FAKE_UUID)
+        self.assertIn('The value of changes-since must be less than '
+                      'or equal to changes-before', six.text_type(ex))
+
     def test_get_action_with_changes_before_old_microversion(self):
         """Tests that the changes-before query parameter is an error before
         microversion 2.66.