insert 0 for vlan if unknown

diff --git a/gnt-monitor b/gnt-monitor
index 3a1973f..368d362 100755 (executable)
--- a/gnt-monitor
+++ b/gnt-monitor
@@ -176,6 +176,7 @@ foreach my $instance ( keys %$stat ) {
 
        foreach my $nic ( @{ $stat->{$instance}->{nic} } ) {
                my $vlan = delete $nic->{vlan};
+               $vlan = 0 unless defined $vlan;
                print $fh qq{ganeti_nic,node=$node,instance=$instance,vlan=${vlan}$location },dump4influx( $nic ), " $t\n";
        }