First PoC of PostgreSQL image minimalization.

Building of PostgreSQL 18-minimal image is based on centos-stream-10 image.

Building of PostgreSQL 18-minimal image is based on ubi10-minimal image.

No s2i-core image is used for building 18-minimal image.

Signed-off-by: Petr "Stone" Hracek <phracek@redhat.com>

Author: phracek

test/test_ocp_container_size.py

@@ -0,0 +1,38 @@
+import pytest
+
+from container_ci_suite.compare_images import ContainerCompareClass
+from container_ci_suite.utils import get_public_image_name, get_previous_os_version
+
+from conftest import VARS
+
+
+class TestPostgreSQLContainerSize:
+    """
+    Test the size of the PostgreSQL container against the
+    already published container images.
+    """
+
+    def test_psql_container_size(self):
+        """
+        Test the size of the PostgreSQL container against the
+        already published container images.
+        """
+        published_image_name = get_public_image_name(
+            os_name=get_previous_os_version(VARS.OS),
+            base_image_name="postgresql",
+            version=VARS.VERSION,
+            stage_registry=True,
+        )
+        is_less_uncopressed = ContainerCompareClass.is_uncompressed_image_smaller(
+            built_image_name=VARS.IMAGE_NAME,
+            published_image=published_image_name,
+        )
+        is_less_compressed = ContainerCompareClass.is_compressed_image_smaller(
+            built_image_name=VARS.IMAGE_NAME,
+            published_image_name=published_image_name,
+        )
+        if not is_less_uncopressed or not is_less_compressed:
+            pytest.skip(
+                f"Container size is not less than the published image {published_image_name}. "
+                f"Uncompressed image size: {is_less_uncopressed}, Compressed image size: {is_less_compressed}"
+            )