Add images.GlanceManager.find_images() bulk query

This adds a bulk query method to GlanceManager that takes multiple
image names or ids and attempts to query glance for all of them
in fewer requests than one-per-image.

Change-Id: I1c6ce27b65920356df6b7001c581a2922765ce0c

novaclient/tests/unit/v2/fakes.py

@@ -1141,7 +1141,7 @@ class FakeSessionClient(base_client.SessionClient):
     # Images
     #
     def get_images(self, **kw):
-        return (200, {}, {'images': [
+        images = [
             {
                 "id": FAKE_IMAGE_UUID_SNAPSHOT,
                 "name": "My Server Backup",
@@ -1191,7 +1191,16 @@ class FakeSessionClient(base_client.SessionClient):
                 "progress": 80,
                 "links": {},
             },
-        ]})
+        ]
+
+        if 'id' in kw:
+            requested = kw['id'].replace('in:', '').split(',')
+            images = [i for i in images if i['id'] in requested]
+        if 'names' in kw:
+            requested = kw['names'].replace('in:', '').split(',')
+            images = [i for i in images if i['name'] in requested]
+
+        return (200, {}, {'images': images})
 
     def get_images_555cae93_fb41_4145_9c52_f5b923538a26(self, **kw):
         return (200, {}, {'image': self.get_images()[2]['images'][0]})

novaclient/tests/unit/v2/test_shell.py

@@ -4676,3 +4676,27 @@ class PollForStatusTestCase(utils.TestCase):
                           action=action,
                           show_progress=True,
                           silent=False)
+
+
+class TestUtilMethods(utils.TestCase):
+    def setUp(self):
+        super(TestUtilMethods, self).setUp()
+        self.shell = self.useFixture(ShellFixture()).shell
+        # NOTE(danms): Get a client that we can use to call things outside of
+        # the shell main
+        self.shell.cs = fakes.FakeClient('2.1')
+
+    def test_find_images(self):
+        """Test find_images() with a name and id."""
+        images = novaclient.v2.shell._find_images(self.shell.cs,
+                                                  [FAKE_UUID_1,
+                                                   'back1'])
+        self.assertEqual(2, len(images))
+        self.assertEqual(FAKE_UUID_1, images[0].id)
+        self.assertEqual(fakes.FAKE_IMAGE_UUID_BACKUP, images[1].id)
+
+    def test_find_images_missing(self):
+        """Test find_images() where one of the images is not found."""
+        self.assertRaises(exceptions.CommandError,
+                          novaclient.v2.shell._find_images,
+                          self.shell.cs, [FAKE_UUID_1, 'foo'])

novaclient/v2/images.py

@@ -66,6 +66,43 @@ class GlanceManager(base.Manager):
                     matches[0].append_request_ids(matches.request_ids)
                     return matches[0]
 
+    def find_images(self, names_or_ids):
+        """Find multiple images by name or id (user provided input).
+
+        :param names_or_ids: A list of strings to use to find images.
+        :returns: novaclient.v2.images.Image objects for each images found
+        :raises exceptions.NotFound: If one or more images is not found
+        :raises exceptions.ClientException: If the image service returns any
+                                            unexpected images.
+
+        NOTE: This method always makes two calls to the image service, even if
+        only one image is provided by ID and is returned in the first query.
+        """
+        with self.alternate_service_type(
+                'image', allowed_types=('image',)):
+            matches = self._list('/v2/images?id=in:%s' % ','.join(
+                names_or_ids), 'images')
+            matches.extend(self._list('/v2/images?names=in:%s' % ','.join(
+                names_or_ids), 'images'))
+            missed = (set(names_or_ids) -
+                      set(m.name for m in matches) -
+                      set(m.id for m in matches))
+            if missed:
+                msg = _("Unable to find image(s): %(images)s") % {
+                    "images": ",".join(missed)}
+                raise exceptions.NotFound(404, msg)
+            for match in matches:
+                match.append_request_ids(matches.request_ids)
+
+            additional = []
+            for i in matches:
+                if i.name not in names_or_ids and i.id not in names_or_ids:
+                    additional.append(i)
+            if additional:
+                msg = _('Additional images found in response')
+                raise exceptions.ClientException(500, msg)
+            return matches
+
     def list(self):
         """
         Get a detailed list of all images.

novaclient/v2/shell.py

@@ -2570,6 +2570,14 @@ def _find_image(cs, image):
         raise exceptions.CommandError(six.text_type(e))
 
 
+def _find_images(cs, images):
+    """Get images by name or ID."""
+    try:
+        return cs.glance.find_images(images)
+    except (exceptions.NotFound, exceptions.NoUniqueMatch) as e:
+        raise exceptions.CommandError(six.text_type(e))
+
+
 def _find_flavor(cs, flavor):
     """Get a flavor by name, ID, or RAM size."""
     try: