Reload udev rules after change

REFERENCE.md

@@ -134,6 +134,7 @@ The following parameters are available in the `systemd` class:
 * [`udev_resolve_names`](#-systemd--udev_resolve_names)
 * [`udev_timeout_signal`](#-systemd--udev_timeout_signal)
 * [`udev_rules`](#-systemd--udev_rules)
+* [`udev_reload`](#-systemd--udev_reload)
 * [`machine_info_settings`](#-systemd--machine_info_settings)
 * [`manage_logind`](#-systemd--manage_logind)
 * [`logind_settings`](#-systemd--logind_settings)
@@ -525,6 +526,14 @@ Config Hash that is used to generate instances of our
 
 Default value: `{}`
 
+##### <a name="-systemd--udev_reload"></a>`udev_reload`
+
+Data type: `Boolean`
+
+Whether udev rules should be automatically reloaded upon change.
+
+Default value: `false`
+
 ##### <a name="-systemd--machine_info_settings"></a>`machine_info_settings`
 
 Data type: `Systemd::MachineInfoSettings`

manifests/init.pp

@@ -157,6 +157,9 @@
 #   Config Hash that is used to generate instances of our
 #   `udev::rule` define.
 #
+# @param udev_reload
+#   Whether udev rules should be automatically reloaded upon change.
+#
 # @param machine_info_settings
 #   Settings to place into /etc/machine-info (hostnamectl)
 #
@@ -261,6 +264,7 @@
   Optional[Integer]                                   $udev_event_timeout = undef,
   Optional[Enum['early', 'late', 'never']]            $udev_resolve_names = undef,
   Optional[Variant[Integer,String]]                   $udev_timeout_signal = undef,
+  Boolean                                             $udev_reload = false,
   Boolean                                             $manage_logind = false,
   Systemd::LogindSettings                             $logind_settings = {},
   Boolean                                             $manage_all_network_files = false,

manifests/udev/rule.pp

@@ -38,12 +38,22 @@
     fail("systemd::udev::rule - ${name}: param rules is empty, you need to pass rules")
   }
 
+  if $systemd::udev_reload {
+    if $notify_services =~ Array {
+      $_notify = $notify_services << 'Exec[systemd-udev_reload]'
+    } else {
+      $_notify = [$notify_services, 'Exec[systemd-udev_reload]']
+    }
+  } else {
+    $_notify = $notify_services
+  }
+
   file { join([$path, $name], '/'):
     ensure                  => $ensure,
     owner                   => 'root',
     group                   => 'root',
     mode                    => '0444',
-    notify                  => $notify_services,
+    notify                  => $_notify,
     selinux_ignore_defaults => $selinux_ignore_defaults,
     content                 => epp("${module_name}/udev_rule.epp", { 'rules' => $rules }),
   }

manifests/udevd.pp

@@ -36,4 +36,10 @@
       * => $udev_rule,
     }
   }
+
+  exec { 'systemd-udev_reload':
+    command     => 'udevadm control --reload-rules && udevadm trigger',
+    refreshonly => true,
+    path        => $facts['path'],
+  }
 }

spec/classes/init_spec.rb

@@ -642,6 +642,7 @@
           let(:params) do
             {
               manage_udevd: true,
+              udev_reload: true,
               udev_log: 'daemon',
               udev_children_max: 1,
               udev_exec_delay: 2,
@@ -664,6 +665,7 @@
               {
                 manage_udevd: true,
                 udev_purge_rules: true,
+                udev_reload: true,
               }
             end
 
@@ -701,6 +703,9 @@
                      'ACTION=="add", KERNEL=="sdb", RUN+="/bin/raw /dev/raw/raw2 %N"',
                    ])
           }
+
+          it { is_expected.to contain_exec('systemd-udev_reload') }
+          it { is_expected.to contain_file('/etc/udev/rules.d/example_raw.rules').that_notifies('Exec[systemd-udev_reload]') }
         end
 
         context 'with machine-info' do

spec/defines/udev_rules_spec.rb

@@ -88,7 +88,24 @@ class { 'systemd': manage_udevd => true, manage_journald => false }
           it { is_expected.to contain_file("/etc/udev/rules.d/#{title}").with_ensure('absent').with_notify([]) }
         end
 
-        describe 'ensured absent with notify' do
+        describe 'ensured absent with automatic reload' do
+          let(:pre_condition) do
+            <<-PUPPET
+            class { 'systemd': manage_udevd => true, manage_journald => false, udev_reload => true }
+            PUPPET
+          end
+          let(:params) do
+            {
+              ensure: 'absent',
+            }
+          end
+
+          it { is_expected.to compile.with_all_deps }
+
+          it { is_expected.to contain_file("/etc/udev/rules.d/#{title}").with_ensure('absent').with_notify(['Exec[systemd-udev_reload]']) }
+        end
+
+        describe 'ensured absent with custom notify' do
           let(:params) { { ensure: 'absent', notify_services: 'Service[systemd-udevd]', } }
 
           it { is_expected.to compile.with_all_deps }