From 1bb94ec92fe837a30177b192a477522b30132aa1 Mon Sep 17 00:00:00 2001
From: James Cassell <code@james.cassell.me>
Date: Tue, 4 Feb 2020 17:32:36 -0500
Subject: [PATCH] service_mgr: detect systemd, even offline (#66071)

* service_mgr: detect systemd, even offline

* service_mgr=systemd iff /sbin/init is symlink
---
 changelogs/fragments/service-mgr-systemd-offline.yml |  3 +++
 lib/ansible/module_utils/facts/system/service_mgr.py | 12 ++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 changelogs/fragments/service-mgr-systemd-offline.yml

diff --git a/changelogs/fragments/service-mgr-systemd-offline.yml b/changelogs/fragments/service-mgr-systemd-offline.yml
new file mode 100644
index 00000000000..dcde9a4e97d
--- /dev/null
+++ b/changelogs/fragments/service-mgr-systemd-offline.yml
@@ -0,0 +1,3 @@
+bugfixes:
+- setup - service_mgr - detect systemd even if it isn't running, such as during
+  a container build
diff --git a/lib/ansible/module_utils/facts/system/service_mgr.py b/lib/ansible/module_utils/facts/system/service_mgr.py
index cb044fbf72c..dc8df68e599 100644
--- a/lib/ansible/module_utils/facts/system/service_mgr.py
+++ b/lib/ansible/module_utils/facts/system/service_mgr.py
@@ -52,6 +52,16 @@ class ServiceMgrFactCollector(BaseFactCollector):
                     return True
         return False
 
+    @staticmethod
+    def is_systemd_managed_offline(module):
+        # tools must be installed
+        if module.get_bin_path('systemctl'):
+            # check if /sbin/init is a symlink to systemd
+            # on SUSE, /sbin/init may be missing if systemd-sysvinit package is not installed.
+            if os.path.islink('/sbin/init') and os.path.basename(os.readlink('/sbin/init')) == 'systemd':
+                return True
+        return False
+
     def collect(self, module=None, collected_facts=None):
         facts_dict = {}
 
@@ -129,6 +139,8 @@ class ServiceMgrFactCollector(BaseFactCollector):
                 service_mgr_name = 'upstart'
             elif os.path.exists('/sbin/openrc'):
                 service_mgr_name = 'openrc'
+            elif self.is_systemd_managed_offline(module=module):
+                service_mgr_name = 'systemd'
             elif os.path.exists('/etc/init.d/'):
                 service_mgr_name = 'sysvinit'