Deprecate systemd::service_limits

The `systemd::service_limts` and corresponding type
`Systemd::Servicelimits` is deprecated.

Switch to `systemd::dropin_file` for a source attributed
`systemd::service_limits` or `systemd::manage_unit` for a
`limits` attributed `systemd::service_limits`.

Author: traylenator

README.md

@@ -586,6 +586,11 @@ Finished on controller-0:
   }
 ```
 
+## Deprecation Notices
+
+The type `systemd::service_limits` is deprecated and `systemd::manage_dropin` or `systemd::dropin_file` should
+be used instead.
+
 ## Transfer Notice
 
 This plugin was originally authored by [Camptocamp](http://www.camptocamp.com).

REFERENCE.md

@@ -34,7 +34,7 @@
 * [`systemd::manage_unit`](#systemd--manage_unit): Generate unit file from template
 * [`systemd::modules_load`](#systemd--modules_load): Creates a modules-load.d drop file
 * [`systemd::network`](#systemd--network): Creates network config for systemd-networkd
-* [`systemd::service_limits`](#systemd--service_limits): Adds a set of custom limits to the service
+* [`systemd::service_limits`](#systemd--service_limits): Deprecated - Adds a set of custom limits to the service
 * [`systemd::timer`](#systemd--timer): Create a timer and optionally a service unit to execute with the timer unit
 * [`systemd::timer_wrapper`](#systemd--timer_wrapper): Helper to define timer and accompanying services for a given task (cron like interface).
 * [`systemd::tmpfile`](#systemd--tmpfile): Creates a systemd tmpfile
@@ -60,7 +60,7 @@
 * [`Systemd::LogindSettings::Ensure`](#Systemd--LogindSettings--Ensure): defines allowed ensure states for systemd-logind settings
 * [`Systemd::MachineInfoSettings`](#Systemd--MachineInfoSettings): Matches Systemd machine-info (hostnamectl) file Struct
 * [`Systemd::OomdSettings`](#Systemd--OomdSettings): Configurations for oomd.conf
-* [`Systemd::ServiceLimits`](#Systemd--ServiceLimits): Matches Systemd Service Limit Struct
+* [`Systemd::ServiceLimits`](#Systemd--ServiceLimits): Deprecated - Matches Systemd Service Limit Struct
 * [`Systemd::Unit`](#Systemd--Unit): custom datatype that validates different filenames for systemd units and unit templates
 * [`Systemd::Unit::Amount`](#Systemd--Unit--Amount): Systemd definition of amount, often bytes or united bytes
 * [`Systemd::Unit::AmountOrPercent`](#Systemd--Unit--AmountOrPercent): Systemd definition of amount, often bytes or united bytes
@@ -160,7 +160,7 @@ Default value: `undef`
 
 Data type: `Stdlib::CreateResources`
 
-Hash of `systemd::service_limits` resources
+Deprecated, use dropin_files - Hash of `systemd::service_limits` resources
 
 Default value: `{}`
 
@@ -1533,7 +1533,7 @@ Default value: `true`
 
 ### <a name="systemd--service_limits"></a>`systemd::service_limits`
 
-Adds a set of custom limits to the service
+Deprecated - Adds a set of custom limits to the service
 
 * **See also**
   * systemd.exec(5)
@@ -2501,7 +2501,7 @@ Struct[{
 
 ### <a name="Systemd--ServiceLimits"></a>`Systemd::ServiceLimits`
 
-Matches Systemd Service Limit Struct
+Deprecated - Matches Systemd Service Limit Struct
 
 Alias of
 

manifests/init.pp

@@ -6,7 +6,7 @@
 #   The default systemd boot target, unmanaged if set to undef.
 #
 # @param service_limits
-#   Hash of `systemd::service_limits` resources
+#   Deprecated, use dropin_files - Hash of `systemd::service_limits` resources
 #
 # @param networks
 #   Hash of `systemd::network` resources

manifests/service_limits.pp

@@ -1,4 +1,4 @@
-# Adds a set of custom limits to the service
+# Deprecated - Adds a set of custom limits to the service
 #
 # @api public
 #
@@ -47,13 +47,6 @@
     fail('$name must match Pattern["^.+\.(service|socket|mount|swap)$"]')
   }
 
-  if $limits and !empty($limits) {
-    $_content = template("${module_name}/limits.erb")
-  }
-  else {
-    $_content = undef
-  }
-
   if $ensure != 'absent' {
     if ($limits and !empty($limits)) and $source {
       fail('You may not supply both limits and source parameters to systemd::service_limits')
@@ -63,14 +56,44 @@
     }
   }
 
-  systemd::dropin_file { "${name}-90-limits.conf":
-    ensure                  => $ensure,
-    unit                    => $name,
-    filename                => '90-limits.conf',
-    path                    => $path,
-    selinux_ignore_defaults => $selinux_ignore_defaults,
-    content                 => $_content,
-    source                  => $source,
-    notify_service          => true,
+  if $limits {
+    # Some typing changed between Systemd::ServiceLimits and Systemd::Unit::Service
+    $_now_tupled = [
+      'IODeviceWeight',
+      'IOReadBandwidthMax',
+      'IOWriteBandwidthMax',
+      'IOReadIOPSMax',
+      'IOWriteIOPSMax',
+    ]
+
+    $_my_limits = $limits.map | $_directive, $_value | {
+      if $_directive in $_now_tupled {
+        { $_directive => $_value.map | $_pair | { Array($_pair).flatten } }  # Convert { 'a' => 'b' } to ['a', b']
+      } else {
+        { $_directive => $_value }
+      }
+    }.reduce | $_memo, $_value | { $_memo + $_value }
+
+    deprecation("systemd::servicelimits - ${title}",'systemd::servicelimits is deprecated, use systemd::manage_dropin')
+    systemd::manage_dropin { '#{name}-90-limits.conf':
+      ensure                  => $ensure,
+      unit                    => $name,
+      filename                => '90-limits.conf',
+      path                    => $path,
+      selinux_ignore_defaults => $selinux_ignore_defaults,
+      service_entry           => $_my_limits,
+      notify_service          => true,
+    }
+  } else {
+    deprecation("systemd::servicelimits ${title}",'systemd::servicelimits is deprecated, use systemd::dropin_file or systemd::manage_dropin')
+    systemd::dropin_file { '#{name}-90-limits.conf':
+      ensure                  => $ensure,
+      unit                    => $name,
+      filename                => '90-limits.conf',
+      path                    => $path,
+      selinux_ignore_defaults => $selinux_ignore_defaults,
+      source                  => $source,
+      notify_service          => true,
+    }
   }
 }

templates/limits.erb

@@ -1,4 +1,5 @@
-# Matches Systemd Service Limit Struct
+# @summary Deprecated - Matches Systemd Service Limit Struct
+#
 type Systemd::ServiceLimits = Struct[
   {
     Optional['LimitCPU']            => Pattern['^\d+(s|m|h|d|w|M|y)?(:\d+(s|m|h|d|w|M|y)?)?$'],