tests: add OS_IMAGE_TYPE setting to allow for minimal tests

Allow setting CLOUD_INIT_OS_IMAGE_TYPE="mimimal" to support
running the full integration test suite against Ubuntu minimal
images.

Required for SC-1750: Daily jenkins ubuntu minimal test runner for
Ubuntu Focal, Jammy and Noble releases.

integration-requirements.txt

@@ -2,7 +2,7 @@
 # PyPI requirements for cloud-init integration testing
 # https://cloudinit.readthedocs.io/en/latest/topics/integration_tests.html
 #
-pycloudlib>=1!6.7.0,<1!8
+pycloudlib>=1!9.1.0,<1!10
 
 # Avoid breaking change in `testpaths` treatment forced
 # test/unittests/conftest.py to be loaded by our integration-tests tox env

tests/integration_tests/clouds.py

@@ -275,6 +275,11 @@ class _LxdIntegrationCloud(IntegrationCloud):
     instance_tag: str
     cloud_instance: _BaseLXD
 
+    def _get_initial_image(self, **kwargs) -> str:
+        return super()._get_initial_image(
+            image_type=self._image_type, **kwargs
+        )
+
     def _get_or_set_profile_list(self, release):
         return None
 

tests/integration_tests/conftest.py

@@ -12,6 +12,7 @@
 from typing import Dict, Generator, Iterator, List, Type
 
 import pytest
+from pycloudlib.cloud import ImageType
 from pycloudlib.lxd.instance import LXDInstance
 
 from tests.integration_tests import integration_settings
@@ -80,8 +81,15 @@ def session_cloud() -> Generator[IntegrationCloud, None, None]:
             f"{integration_settings.PLATFORM} is an invalid PLATFORM "
             f"specified in settings. Must be one of {list(platforms.keys())}"
         )
-
-    cloud = platforms[integration_settings.PLATFORM]()
+    image_types = [member.value for member in ImageType.__members__.values()]
+    try:
+        image_type = ImageType(integration_settings.OS_IMAGE_TYPE)
+    except ValueError:
+        raise ValueError(
+            f"{integration_settings.OS_IMAGE_TYPE} is an invalid OS_IMAGE_TYPE"
+            f" specified in settings. Must be one of {image_types}"
+        )
+    cloud = platforms[integration_settings.PLATFORM](image_type=image_type)
     cloud.emit_settings_to_log()
     yield cloud
     cloud.destroy()

tests/integration_tests/integration_settings.py

@@ -39,6 +39,17 @@
 # to this format internally; in this case, to "None::ubuntu::focal::20.04".)
 OS_IMAGE = "focal"
 
+
+# Determines unique image type or flavor to exercise if the cloud supports
+# image-type lookup for daily_image and released_images.
+#
+# One of the following:
+# - generic
+# - minimal
+# - Pro
+# - Pro FIPS
+OS_IMAGE_TYPE = "generic"
+
 # Populate if you want to use a pre-launched instance instead of
 # creating a new one. The exact contents will be platform dependent
 EXISTING_INSTANCE_ID: Optional[str] = None