Add systemd support (#14)

* Add systemd support

* Add binary_directory parameter for systemd

Author: andy-s-clark

README.md

@@ -64,14 +64,22 @@ redhat init.d or upstart depending on the service provider.
    Default: 'upstart'
 
    `upstart` is required for the default `service_file`, and
-   works on RedHat >= 6. Setting `service_provider` to `redhat`
+   works on RedHat 6. Setting `service_provider` to `redhat`
    will now deploy the init.d service file, unless you specifically
    set `service_template` etc.
+   `systemd` will create a systemd service on RedHat 7.
 
 * `manage_service_file`
    Whether to override the system service file if it exists.
    Default: true
 
+*  `binary_directory`
+   Default: '/usr/sbin'
+
+   Directory containing the uwsgi binary. Used by the `systemd`
+   service_provider; not used by the `upstart` or `redhat` service_provider
+   parameter.
+
 * `config_file`
    The location of the uwsgi config file.
    Default: '/etc/uwsgi.ini'

manifests/init.pp

@@ -41,11 +41,16 @@
 # [*service_provider*]
 #    The service provider. Default: 'upstart'
 #    'upstart' is required for the default service_file, and
-#    works on RedHat >= 6
+#    works on RedHat 6.
+#    'systemd' works on RedHat 7.
 #
 # [*manage_service_file*]
 #    Whether to override the system service file if it exists. Default: true
 #
+# [*binary_directory*]
+#    Directory containing the uwsgi binary. Used by the 'systemd'
+#    service_provider, but not 'upstart' or 'redhat'.
+#
 # [*config_file*]
 #    The location of the uwsgi config file. Default: '/etc/uwsgi.ini'
 #
@@ -100,6 +105,7 @@
     $service_enable      = $uwsgi::params::service_enable,
     $service_provider    = $uwsgi::params::service_provider,
     $manage_service_file = $uwsgi::params::manage_service_file,
+    $binary_directory    = $uwsgi::params::binary_directory,
     $config_file         = $uwsgi::params::config_file,
     $log_file            = $uwsgi::params::log_file,
     $log_rotate          = $uwsgi::params::log_rotate,
@@ -156,6 +162,7 @@
           $service_file_real = $service_provider ? {
               redhat  => '/etc/init.d/uwsgi',
               upstart => '/etc/init/uwsgi.conf',
+              systemd => '/etc/systemd/system/uwsgi.service',
               default => '/etc/init/uwsgi.conf',
           }
       } else {
@@ -166,6 +173,7 @@
           $service_file_mode_real = $service_provider ? {
               redhat  => '0555',
               upstart => '0644',
+              systemd => '0644',
               default => '0644',
           }
       } else {
@@ -176,6 +184,7 @@
           $service_template_real = $service_provider ? {
               redhat  => 'uwsgi/uwsgi_service-redhat.erb',
               upstart => 'uwsgi/uwsgi_upstart.conf.erb',
+              systemd => 'uwsgi/uwsgi_systemd.service.erb',
               default => 'uwsgi/uwsgi_upstart.conf.erb',
           }
       } else {
@@ -192,10 +201,43 @@
           require  => Package[$package_name]
       }
       $required_files = [ $config_file, $service_file_real ]
+
+      if $service_provider == 'systemd' {
+        exec { 'uwsgi-reload-systemd':
+          command     => '/bin/systemctl daemon-reload',
+          refreshonly => true,
+          subscribe   => File[$service_file_real],
+          before      => Service[$service_name],
+        }
+      }
     } else {
       $required_files = $config_file
     }
 
+    $log_directory = dirname($log_file)
+    $pid_directory = dirname($pidfile)
+    $socket_directory = dirname($socket)
+
+    exec { $log_directory:
+        creates => $log_directory,
+        command => "mkdir -p ${log_directory}",
+        path    => $::path
+    } -> file { $log_directory: }
+
+    exec { $pid_directory:
+        creates => $pid_directory,
+        command => "mkdir -p ${pid_directory}",
+        path    => $::path
+    } -> file { $pid_directory: }
+
+    if $socket_directory != $pid_directory {
+      exec { $socket_directory:
+          creates => $socket_directory,
+          command => "mkdir -p ${socket_directory}",
+          path    => $::path
+      } -> file { $socket_directory: }
+    }
+
     file { $app_directory:
         ensure  => 'directory',
         owner   => 'root',
@@ -212,7 +254,10 @@
         provider   => $service_provider,
         require    => [
             Package[$package_name],
-            File[$required_files]
+            File[$required_files],
+            File[$log_directory],
+            File[$pid_directory],
+            File[$socket_directory],
             ],
         subscribe  => File[$required_files]
     }

manifests/params.pp

@@ -14,6 +14,7 @@
     $service_enable      = true
     $service_provider    = 'upstart'
     $manage_service_file = true
+    $binary_directory    = '/usr/sbin'
     $config_file         = '/etc/uwsgi.ini'
     $tyrant              = true
     $install_pip         = true

templates/uwsgi_systemd.service.erb

@@ -0,0 +1,15 @@
+#
+# This file is managed by the puppet class 'uwsgi'
+#
+# uWSGI Emperor process systemd service
+#
+[Unit]
+Description=uWSGI Emperor
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=<%= @binary_directory %>/uwsgi --die-on-term --ini <%= @config_file %>
+
+[Install]
+WantedBy=multi-user.target

templates/uwsgi_upstart.conf.erb

@@ -9,15 +9,4 @@ stop on runlevel [!2345]
 
 respawn
 
-pre-start script
-    uwsgilog="<%= @log_file %>"
-    uwsgipid="<%= @pidfile %>"
-    uwsgisocket="<%= @socket %>"
-    uwsgilogdir="${uwsgilog%/*}"
-    uwsgipiddir="${uwsgipid%/*}"
-    uwsgisocketdir="${uwsgisocket%/*}"
-    mkdir -p "$uwsgipiddir"
-    mkdir -p "$uwsgisocketdir"
-    mkdir -p "$uwsgilogdir"
-end script
 exec uwsgi --die-on-term --ini <%= @config_file %>