puppet/modules/time/manifests/init.pp

# takes care of everything related to time
class time {
  class { 'chrony':
    servers => {
      'ptbtime1.ptb.de' => ['iburst'],
      'ptbtime2.ptb.de' => ['iburst'],
      'ptbtime3.ptb.de' => ['iburst'],
      'ptbtime4.ptb.de' => ['iburst'],
    },
  }
  service { 'systemd-timesyncd.service':
    ensure => stopped,
    enable => false,
  }
}