Adding name of the httpd service as a param

deployment/puppet/horizon/manifests/init.pp

@@ -20,7 +20,8 @@ class horizon(
   }
 
   service { 'httpd':
-    name      => 'apache2',
+    name      => $::horizon::params::http_service,
+    ensure    => 'running',
     subscribe => File['/etc/openstack-dashboard/local_settings.py']
   }
 }

deployment/puppet/horizon/manifests/params.pp

@@ -0,0 +1,17 @@
+# these parameters need to be accessed from several locations and
+# should be considered to be constant
+class horizon::params {
+
+  case $::osfamily {
+    'RedHat': {
+      $http_service                = 'httpd'
+    }
+    'Debian': {
+      $http_service                = 'apache2'
+    }
+    default: {
+      fail("Unsupported osfamily: ${::osfamily} operatingsystem: ${::operatingsystem}, module ${module_name} only support osfamily RedHat and Debian")
+    }
+  }
+
+}