docs: def filter_slaves(selfie, slaves):
          """
          Remove slaves that are in an ODOWN or SDOWN state
          also remove slaves that do not have 'ok' master-link-status
          """
          return [(s['ip'], s['port']) for s in slaves
                  if not s['is_odown'] and
                  not s['is_sdown'] and
                  s['master-link-status'] == 'ok']