def prepare
      started_at = DateTime.now.to_s
      prepare_deploy
      prepare_common_installation
      puppet_installation
      create_prepare_checkpoint(started_at)
    end
def prepare
      started_at = DateTime.now.to_s
      prepare_deploy
      prepare_common_installation
      puppet_installation
      create_prepare_checkpoint(started_at)
    end
Prepare the configured nodes