Add code for ring syncing

This commit adds puppet code to handle syncing of the ring
databases.

The class swift::ringserver is used to set up an rsync server
that serve out the ring databases.

The define swift::ringsync is used to rsync these ring databases
to the other hosts.

manifests/ringserver.pp

@@ -0,0 +1,39 @@
+# Used to create an rsync server to serve up the ring databases via rsync
+#
+# == Parameters
+#
+# == Dependencies
+#
+#   Class['swift']
+#
+# == Examples
+#
+# == Authors
+#
+#   Dan Bode dan@puppetlabs.com
+#
+# == Copyright
+#
+# Copyright 2011 Puppetlabs Inc, unless otherwise noted.
+#
+class swift::ringserver(
+  $local_net_ip,
+  $max_connections = 5
+) {
+
+  Class['ringbuilder'] -> Class['swift::ringserver']
+
+  class { 'rsync::server':
+    use_xinetd => true,
+    address    => $local_net_ip,
+  }
+
+  rsync::server::module { "swift_server":
+    path => '/etc/swift',
+    lock_file => "/var/lock/swift_server.lock",
+    uid => 'swift',
+    gid => 'swift',
+    max_connections => $max_connections,
+    read_only => true,
+  }
+}

manifests/ringsync.pp

@@ -0,0 +1,10 @@
+define swift::ringsync(
+  $ring_server
+) {
+
+  Exec { path => '/usr/bin' }
+
+  rsync::get { "/etc/swift/${name}.ring.gz":
+    source  => "rsync://${ring_server}/swift_server/${name}.ring.gz",
+  }
+}