foreach my $machine (keys %{$json->{machineTypes}}) {
        my $machineType = $machine  =~ s/:|,/_/r;
        gauge("hydra.queue.$machineType.runnable", $json->{machineTypes}->{$machine}->{runnable});
        gauge("hydra.queue.$machineType.running", $json->{machineTypes}->{$machine}->{running});
    }