Install rubygems for puppetmaster on CentOS 6

mongrel/manifests/init.pp

@@ -3,14 +3,27 @@
 #
 class mongrel {
 
+    require ruby::rubygems
+
     package { "mongrel":
-        name   => $operatingsystem ? {
+        ensure   => installed,
+        name     => $operatingsystem ? {
             openbsd => "ruby-mongrel",
             debian  => "mongrel",
             ubuntu  => "mongrel",
+            centos  => $operatingsystemrelease ? {
+                /^[1-5]/ => "rubygem-mongrel",
+                default  => "mongrel",
+            },
             default => "rubygem-mongrel",
         },
-        ensure => installed,
+        provider => $operatingsystem ? {
+            centos  => $operatingsystemrelease ? {
+                /^[1-5]/ => undef,
+                default  => "gem",
+            },
+            default => undef,
+        },
     }
 
 }