$rrd_def_signatures_total = RrdDefinition::make()
    ->addDataset('signatures_total', 'GAUGE', 0)
    ->addDataset('s0signatures_total', 'GAUGE', 0)
    ->addDataset('s1signatures_total', 'GAUGE', 0)
    ->addDataset('s2signatures_total', 'GAUGE', 0)