add systemd version and features fact (#83083)

Signed-off-by: Thomas Sjögren <konstruktoid@users.noreply.github.com>

changelogs/fragments/add_systemd_facts.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - facts - add systemd version and features

lib/ansible/module_utils/facts/default_collectors.py

@@ -53,6 +53,7 @@ from ansible.module_utils.facts.system.python import PythonFactCollector
 from ansible.module_utils.facts.system.selinux import SelinuxFactCollector
 from ansible.module_utils.facts.system.service_mgr import ServiceMgrFactCollector
 from ansible.module_utils.facts.system.ssh_pub_keys import SshPubKeyFactCollector
+from ansible.module_utils.facts.system.systemd import SystemdFactCollector
 from ansible.module_utils.facts.system.user import UserFactCollector
 
 from ansible.module_utils.facts.hardware.base import HardwareCollector
@@ -118,7 +119,8 @@ _general = [
     EnvFactCollector,
     LoadAvgFactCollector,
     SshPubKeyFactCollector,
-    UserFactCollector
+    UserFactCollector,
+    SystemdFactCollector
 ]  # type: t.List[t.Type[BaseFactCollector]]
 
 # virtual, this might also limit hardware/networking

lib/ansible/module_utils/facts/system/systemd.py

@@ -0,0 +1,47 @@
+# Get systemd version and features
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+import ansible.module_utils.compat.typing as t
+
+from ansible.module_utils.facts.collector import BaseFactCollector
+from ansible.module_utils.facts.system.service_mgr import ServiceMgrFactCollector
+
+
+class SystemdFactCollector(BaseFactCollector):
+    name = "systemd"
+    _fact_ids = set()  # type: t.Set[str]
+
+    def collect(self, module=None, collected_facts=None):
+        systemctl_bin = module.get_bin_path("systemctl")
+        if systemctl_bin and ServiceMgrFactCollector.is_systemd_managed(module):
+            rc, stdout, stderr = module.run_command(
+                [systemctl_bin, "--version"],
+                check_rc=False,
+            )
+
+            systemd_facts = {}
+
+            if rc != 0:
+                return systemd_facts
+
+            systemd_facts["systemd"] = {}
+            systemd_facts["systemd"]["features"] = str(stdout.split("\n")[1])
+            systemd_facts["systemd"]["version"] = int(stdout.split(" ")[1])
+
+            return systemd_facts

lib/ansible/modules/setup.py

@@ -25,7 +25,7 @@ options:
               V(processor_count), V(python), V(python_version), V(real_user_id), V(selinux), V(service_mgr),
               V(ssh_host_key_dsa_public), V(ssh_host_key_ecdsa_public), V(ssh_host_key_ed25519_public),
               V(ssh_host_key_rsa_public), V(ssh_host_pub_keys), V(ssh_pub_keys), V(system), V(system_capabilities),
-              V(system_capabilities_enforced), V(user), V(user_dir), V(user_gecos), V(user_gid), V(user_id),
+              V(system_capabilities_enforced), V(systemd), V(user), V(user_dir), V(user_gecos), V(user_gid), V(user_id),
               V(user_shell), V(user_uid), V(virtual), V(virtualization_role), V(virtualization_type).
              Can specify a list of values to specify a larger subset.
              Values can also be used with an initial C(!) to specify that

test/integration/targets/systemd/tasks/main.yml

@@ -121,4 +121,5 @@
 - import_tasks: test_unit_template.yml
 - import_tasks: test_indirect_service.yml
 - import_tasks: test_enabled_runtime.yml
+- import_tasks: test_systemd_version.yml
 - import_tasks: test_mask.yml

test/integration/targets/systemd/tasks/test_systemd_version.yml

@@ -0,0 +1,11 @@
+---
+- name: Show Gathered Facts
+  ansible.builtin.debug:
+    msg: "{{ ansible_systemd }}"
+
+- name: Assert the systemd version fact
+  ansible.builtin.assert:
+    that:
+      - ansible_systemd.version | int
+      - ansible_systemd.version is match('^[1-9][0-9][0-9]$')
+      - ansible_systemd.features | regex_search('(\\+|-)(PAM|AUDIT)')