integration: test against the Ubuntu daily images

Dailies are always available for stable releases and the devel release.
Moreover testing against dailies will warn us earlier about issues.

tests/integration_tests/clouds.py

@@ -106,14 +106,14 @@ class IntegrationCloud(ABC):
     def __init__(self, settings=integration_settings):
         self.settings = settings
         self.cloud_instance = self._get_cloud_instance()
-        self.released_image_id = self._get_initial_image()
+        self.initial_image_id = self._get_initial_image()
         self.snapshot_id = None
 
     @property
     def image_id(self):
         if self.snapshot_id:
             return self.snapshot_id
-        return self.released_image_id
+        return self.initial_image_id
 
     def emit_settings_to_log(self) -> None:
         log.info(
@@ -133,7 +133,7 @@ def _get_cloud_instance(self):
     def _get_initial_image(self):
         image = ImageSpecification.from_os_image()
         try:
-            return self.cloud_instance.released_image(image.image_id)
+            return self.cloud_instance.daily_image(image.image_id)
         except (ValueError, IndexError):
             return image.image_id
 

tests/integration_tests/test_upgrade.py

@@ -59,7 +59,7 @@ def test_clean_boot_of_upgraded_package(session_cloud: IntegrationCloud):
         return
 
     launch_kwargs = {
-        "image_id": session_cloud.released_image_id,
+        "image_id": session_cloud.initial_image_id,
     }
 
     with session_cloud.launch(
@@ -178,7 +178,7 @@ def test_subsequent_boot_of_upgraded_package(session_cloud: IntegrationCloud):
             pytest.skip(UNSUPPORTED_INSTALL_METHOD_MSG.format(source))
         return  # type checking doesn't understand that skip raises
 
-    launch_kwargs = {"image_id": session_cloud.released_image_id}
+    launch_kwargs = {"image_id": session_cloud.initial_image_id}
 
     with session_cloud.launch(launch_kwargs=launch_kwargs) as instance:
         instance.install_new_cloud_init(