Do not always assume image_id in volume_image_metadata

volume_image_metadata can contain only fields other than image_id.
We should not assume volume_image_metadata always contain image_id
when volume_image_metadata exists.

Change-Id: I0db8a05e488eb6bf276760d5116d05633c882701
Closes-Bug: #1834747

openstack_dashboard/dashboards/project/instances/tests.py

@@ -392,7 +392,8 @@ class InstanceTableTests(InstanceTestBase, InstanceTableTestMixin):
         api.network: ('servers_update_addresses',),
         api.cinder: ('volume_list',),
     })
-    def test_index_with_instance_booted_from_volume(self):
+    def _test_index_with_instance_booted_from_volume(
+            self, volume_image_metadata, expected_image_name):
         servers = self.servers.list()
         volume_server = servers[0]
         # Override the server is booted from a volume.
@@ -410,10 +411,7 @@ class InstanceTableTests(InstanceTestBase, InstanceTableTestMixin):
         volumes = self.cinder_volumes.list()
         # 3rd volume in the list is attached to server with ID 1.
         volume = volumes[2]
-        base_image = self.images.get(name='private_image')
-        volume.volume_image_metadata = {
-            "image_id": base_image.id,
-        }
+        volume.volume_image_metadata = volume_image_metadata
 
         self._mock_extension_supported({'AdminActions': True,
                                         'Shelve': True})
@@ -433,7 +431,8 @@ class InstanceTableTests(InstanceTestBase, InstanceTableTestMixin):
         self.assertTemplateUsed(res, INDEX_TEMPLATE)
         instances = res.context['instances_table'].data
         self.assertEqual(len(instances), len(servers))
-        self.assertContains(res, base_image.name)
+        if expected_image_name:
+            self.assertContains(res, expected_image_name)
 
         self._check_extension_supported({'AdminActions': 16,
                                          'Shelve': 4})
@@ -461,6 +460,28 @@ class InstanceTableTests(InstanceTestBase, InstanceTableTestMixin):
             mock.call(helpers.IsHttpRequest()))
         self.mock_volume_list.assert_called_once_with(helpers.IsHttpRequest())
 
+        return instances
+
+    def test_index_with_instance_booted_from_volume(self):
+        base_image = self.images.get(name='private_image')
+        image_metadata = {
+            "image_id": base_image.id
+        }
+        servers = self._test_index_with_instance_booted_from_volume(
+            image_metadata, expected_image_name=base_image.name)
+        self.assertEqual(base_image.name, servers[0].image.name)
+
+    def test_index_with_instance_booted_from_volume_no_image_info(self):
+        # Borrowed from bug #1834747
+        image_metadata = {
+            'hw_qemu_guest_agent': 'yes',
+            'hw_vif_multiqueue_enabled': 'true',
+            'os_require_quiesce': 'yes',
+        }
+        servers = self._test_index_with_instance_booted_from_volume(
+            image_metadata, expected_image_name=None)
+        self.assertEqual('', servers[0].image)
+
     def test_index_with_console_link(self):
         res = self._get_index()
 

openstack_dashboard/dashboards/project/instances/views.py

@@ -210,8 +210,12 @@ class IndexView(tables.PagedTableMixin, tables.DataTableView):
             # Getting volume object, which is as attached
             # as the first device
             boot_volume = volume_dict[instance_volumes[0]['id']]
-            if hasattr(boot_volume, "volume_image_metadata"):
-                image_id = boot_volume.volume_image_metadata['image_id']
+            # There is a case where volume_image_metadata contains
+            # only fields other than 'image_id' (See bug 1834747),
+            # so we try to populate image information only when it is found.
+            volume_metadata = getattr(boot_volume, "volume_image_metadata", {})
+            image_id = volume_metadata.get('image_id')
+            if image_id:
                 try:
                     instance.image = image_dict[image_id]
                 except KeyError: