[root@pe-386-master ~]# cat /tmp/test.pp
service { 'foo':
  ensure => running,
}

Service <| title == 'foo' |> {
  ensure => undef,
}
[root@pe-386-master ~]# puppet resource service foo
service { 'foo':
  ensure => 'stopped',
  enable => 'false',
}
[root@pe-386-master ~]# puppet apply /tmp/test.pp
Notice: Compiled catalog for pe-386-master in environment production in 0.15 seconds
Notice: Finished catalog run in 0.21 seconds
[root@pe-386-master ~]#