fix(build): add UBI 9 compiler tool‑chain and split fast/slow tests (#1970)

* build_container.sh
  - append `python3.11‑devel gcc make` to UBI 9 dnf line so C‑ext wheels build.
* tests/integration
  - + test_ubi9_toolchain.py   (fast; asserts pkgs exist in Containerfile)
  - + test_ubi9_compiles.py    (slow; @integration, compiles hello‑world in built image)
  - – test_container_build.py  (removed heavyweight test)
* pytest.ini
  - register `integration` marker.
* CI
  - tests.yml ⇒ `pytest -m "not integration"`
  - providers_build.yml ⇒ run integration compiler smoke for container jobs

tests/integration/test_ubi9_compiles.py

@@ -0,0 +1,63 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import os
+import subprocess
+import tempfile
+import textwrap
+from pathlib import Path
+
+import pytest
+import yaml
+
+pytestmark = pytest.mark.integration  # filtered out of the fast suite
+
+
+def _tmp_yaml() -> Path:
+    f = tempfile.NamedTemporaryFile(delete=False, suffix=".yaml")
+    yaml.safe_dump(
+        {
+            "version": "2",
+            "distribution_spec": {
+                "description": "UBI9 compile smoke",
+                "providers": {
+                    "inference": ["remote::ollama"],
+                    "vector_io": ["inline::faiss"],
+                },
+                "container_image": "registry.access.redhat.com/ubi9",
+            },
+            "image_type": "container",
+            "image_name": "ci-test",
+        },
+        f,
+    )
+    f.close()
+    return Path(f.name)
+
+
+def test_image_compiles_c():
+    cfg = _tmp_yaml()
+    tag = "ci-test:dev"
+
+    # Build image (providers‑build.yml already did `uv venv` etc.)
+    subprocess.run(
+        ["llama", "stack", "build", "--config", cfg, "--image-name", "ci-test"],
+        check=True,
+        env={**os.environ, "USE_COPY_NOT_MOUNT": "true"},
+    )
+
+    # compile a hello‑world c program inside the container
+    hello_c = textwrap.dedent("""
+        #include <stdio.h>
+        int main(){puts("ok");return 0;}
+    """)
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".c") as f:
+        f.write(hello_c.encode())
+
+    subprocess.run(
+        ["docker", "run", "--rm", "-v", f.name + ":/tmp/a.c", tag, "bash", "-c", "gcc /tmp/a.c -o /tmp/a && /tmp/a"],
+        check=True,
+    )

tests/integration/test_ubi9_toolchain.py

@@ -0,0 +1,53 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import re
+import subprocess
+import tempfile
+from pathlib import Path
+
+import yaml
+
+# exact packages we just added
+REQUIRED_PKGS = ("python3.11-devel", "gcc", "make")
+
+
+def _tmp_yaml() -> Path:
+    f = tempfile.NamedTemporaryFile(delete=False, suffix=".yaml")
+    yaml.safe_dump(
+        {
+            "version": "2",
+            "distribution_spec": {
+                "description": "CI smoke test",
+                "providers": {
+                    "inference": ["remote::ollama"],
+                    "vector_io": ["inline::faiss"],
+                },
+                "container_image": "registry.access.redhat.com/ubi9",
+            },
+            "image_type": "container",
+            "image_name": "ci-test",
+        },
+        f,
+    )
+    f.close()
+    return Path(f.name)
+
+
+def test_ubi9_toolchain_present():
+    cfg = _tmp_yaml()
+
+    # --dry-run only renders the Containerfile
+    out = subprocess.run(
+        ["llama", "stack", "build", "--config", cfg, "--dry-run"],
+        text=True,
+        capture_output=True,
+        check=True,
+    ).stdout
+
+    cfile = Path(re.search(r"(/tmp/.+?/Containerfile)", out).group(1)).read_text()
+    missing = [p for p in REQUIRED_PKGS if p not in cfile]
+    assert not missing, f"dnf line lost packages: {', '.join(missing)}"

tests/pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+markers =
+    integration: slow / docker‑dependent tests