Add SELinux test

Checks that SELinux is enabled and permissive on supported systems.

Author: markgoddard

stackhpc_openstack_tests/host/test_selinux.py

@@ -0,0 +1,38 @@
+# Copyright (c) 2024 StackHPC Ltd.
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import os
+import pytest
+
+
+def test_selinux(host):
+    """Check that SELinux is enabled and permissive on supported systems."""
+    # Adapted from Kayobe host configure tests:
+    # https://opendev.org/openstack/kayobe/src/branch/master/playbooks/kayobe-overcloud-host-configure-base/tests/test_overcloud_host_configure.py
+    if host.system_info.distribution in {"debian", "ubuntu"}:
+        pytest.skip(reason="SELinux is not supported on Debian or Ubuntu")
+    # Desired state: enforcing, permissive or disabled
+    expected_state = os.environ["SELINUX_STATE"]
+    assert expected_state in {"enforcing", "permissive", "disabled"}
+    expected_status = "disabled" if expected_state == "disabled" else "enabled"
+    expected_mode = expected_state
+    selinux = host.check_output("sestatus")
+    selinux = selinux.splitlines()
+    # Remove duplicate whitespace characters in output
+    selinux = [" ".join(x.split()) for x in selinux]
+
+    assert f"SELinux status: {expected_status}" in selinux
+    if expected_status == "enabled":
+        assert f"Current mode: {expected_mode}" in selinux
+        assert f"Mode from config file: {expected_mode}" in selinux