(#1043) - Add support for any necessary systemd system parameters via hash input

REFERENCE.md

@@ -136,6 +136,27 @@ class { 'rabbitmq':
 }
 ```
 
+##### Change RabbitMQ service startup timeout via SystemD to 20 minutes (1200 seconds) :
+
+```puppet
+class { 'rabbitmq':
+  systemd_additional_service_parameters => {
+    'TimeoutStartSec' => 1200,
+  }
+}
+```
+
+##### Change multiple RabbitMQ service startup parameters via SystemD:
+
+```puppet
+class { 'rabbitmq':
+  systemd_additional_service_parameters => {
+    'TimeoutStartSec' => 1200,
+    'TimeoutStopSec'  => 1200,
+  }
+}
+```
+
 ##### Change Erlang Kernel Config Variables in rabbitmq.config
 
 ```puppet
@@ -225,6 +246,7 @@ The following parameters are available in the `rabbitmq` class:
 * [`environment_variables`](#-rabbitmq--environment_variables)
 * [`erlang_cookie`](#-rabbitmq--erlang_cookie)
 * [`file_limit`](#-rabbitmq--file_limit)
+* [`systemd_additional_service_parameters`](#-rabbitmq--systemd_additional_service_parameters)
 * [`oom_score_adj`](#-rabbitmq--oom_score_adj)
 * [`heartbeat`](#-rabbitmq--heartbeat)
 * [`inetrc_config`](#-rabbitmq--inetrc_config)
@@ -565,6 +587,15 @@ Set rabbitmq file ulimit. Defaults to 16384. Only available on Linux
 
 Default value: `16384`
 
+##### <a name="-rabbitmq--systemd_additional_service_parameters"></a>`systemd_additional_service_parameters`
+
+Data type: `Hash`
+
+Hash of additional systemd service parameters which are appended to the dropin file. No validation is done, this is passed verbotem to the systemd dropin module.
+Defaults to {}. Only available on Linux
+
+Default value: `{}`
+
 ##### <a name="-rabbitmq--oom_score_adj"></a>`oom_score_adj`
 
 Data type: `Integer[-1000, 1000]`

manifests/config.pp

@@ -89,6 +89,7 @@
   $auth_backends                                      = $rabbitmq::auth_backends
   $cluster_partition_handling                         = $rabbitmq::cluster_partition_handling
   $file_limit                                         = $rabbitmq::file_limit
+  $systemd_additional_service_parameters              = $rabbitmq::systemd_additional_service_parameters
   $oom_score_adj                                      = $rabbitmq::oom_score_adj
   $collect_statistics_interval                        = $rabbitmq::collect_statistics_interval
   $ipv6                                               = $rabbitmq::ipv6
@@ -227,14 +228,16 @@
     }
   }
 
+  # Create our complete hash of all possible systemd dropin values
+  # When there is a duplicate key, the key in the rightmost hash will "win."
+  # This order ensures that if we set LimitNOFILE or OOMScoreAdjust "twice" the explicit set one "wins" which is needed for consistency with the other places it's also configured.
+  $completesystemdpropertieshash = $systemd_additional_service_parameters + { 'LimitNOFILE' => $file_limit, 'OOMScoreAdjust' => $oom_score_adj, }
+
   if $facts['kernel'] == 'Linux' {
     systemd::manage_dropin { 'service-90-limits.conf':
       unit                    => "${service_name}.service",
       selinux_ignore_defaults => ($facts['os']['family'] == 'RedHat'),
-      service_entry           => {
-        'LimitNOFILE'    => $file_limit,
-        'OOMScoreAdjust' => $oom_score_adj,
-      },
+      service_entry           => $completesystemdpropertieshash,
     }
   }
 

manifests/init.pp

@@ -65,6 +65,20 @@
 #     }
 #   }
 #
+# @example Change RabbitMQ service startup timeout via SystemD to 20 minutes (1200 seconds) :
+#   class { 'rabbitmq':
+#     systemd_additional_service_parameters => {
+#       'TimeoutStartSec' => 1200,
+#     }
+#   }
+# @example Change multiple RabbitMQ service startup parameters via SystemD:
+#   class { 'rabbitmq':
+#     systemd_additional_service_parameters => {
+#       'TimeoutStartSec' => 1200,
+#       'TimeoutStopSec'  => 1200,
+#     }
+#   }
+#
 # @example Change Erlang Kernel Config Variables in rabbitmq.config
 #   class { 'rabbitmq':
 #     port                    => '5672',
@@ -176,6 +190,9 @@
 #   to 'False' and set 'erlang_cookie'.
 # @param file_limit
 #   Set rabbitmq file ulimit. Defaults to 16384. Only available on Linux
+# @param systemd_additional_service_parameters
+#   Hash of additional systemd service parameters which are appended to the dropin file. No validation is done, this is passed verbotem to the systemd dropin module.
+#   Defaults to {}. Only available on Linux
 # @param oom_score_adj
 #   Set rabbitmq-server process OOM score. Defaults to 0.
 # @param heartbeat
@@ -470,6 +487,7 @@
   Boolean $wipe_db_on_cookie_change                                                                = false,
   String $cluster_partition_handling                                                               = 'ignore',
   Variant[Integer[-1],Enum['unlimited'],Pattern[/^(infinity|\d+(:(infinity|\d+))?)$/]] $file_limit = 16384,
+  Hash $systemd_additional_service_parameters                                                      = {},
   Integer[-1000, 1000] $oom_score_adj                                                              = 0,
   Hash $environment_variables                                                                      = { 'LC_ALL' => 'en_US.UTF-8' },
   Hash $config_variables                                                                           = {},

spec/classes/rabbitmq_spec.rb

@@ -183,6 +183,22 @@
         end
       end
 
+      { 'TimeoutStartSec' => 1200, 'TimeoutStopSec' => 1200, }.each do |key, value|
+        context "with systemd_additional_service_parameters => '{ #{key} => #{value}'", if: os_facts['kernel'] == 'Linux' do
+          let(:params) { { systemd_additional_service_parameters: { key => value } } }
+
+          it { is_expected.to contain_systemd__manage_dropin('service-90-limits.conf').with_service_entry({ key => value, 'LimitNOFILE' => 16_384, 'OOMScoreAdjust' => 0 }) }
+        end
+      end
+
+      { 'TimeoutStartSec' => 600, 'TimeoutStopSec' => 2400, }.each do |key, value|
+        context "with systemd_additional_service_parameters => '{ #{key} => #{value}'", if: os_facts['kernel'] == 'Linux' do
+          let(:params) { { systemd_additional_service_parameters: { key => value } } }
+
+          it { is_expected.to contain_systemd__manage_dropin('service-90-limits.conf').with_service_entry({ key => value, 'LimitNOFILE' => 16_384, 'OOMScoreAdjust' => 0 }) }
+        end
+      end
+
       context 'on Linux', if: os_facts['kernel'] == 'Linux' do
         it { is_expected.to contain_systemd__manage_dropin('service-90-limits.conf') }
       end