Graph doesn't show any values...

[sbocquet]

Hi,

I'm not new to rrdtool but I cannot figure this out. Any help would be appreciated.
I want to create a graph with rrdtool with some values from IPTable. I have configured my collectd service to catch those events and store them in a RRD database.

collectd configuration:

LoadPlugin tail <Plugin tail>
        <File "/var/log/iptables.log">
                Plugin "firewall"
                Instance "iptables"
                Interval 60
                <Match>
                        Regex "INPUT/DROP"
                        DSType "GaugeInc"
                        Type "gauge"
                        Instance "incoming-total"
                </Match>
                <Match>
                        Regex "DPT=22 "
                        DSType "GaugeInc"
                        Type "gauge"
                        Instance "incoming-port22"
                </Match>
                <Match>
                        Regex "DPT=80 "
                        DSType "GaugeInc"
                        Type "gauge"
                        Instance "incoming-port80"
                </Match>
                <Match>
                        Regex "DPT=443 "
                        DSType "GaugeInc"
                        Type "gauge"
                        Instance "incoming-port443"
                </Match>
                <Match>
                        Regex "DPT=8080 "
                        DSType "GaugeInc"
                        Type "gauge"
                        Instance "incoming-port8080"
                </Match>
        </File> </Plugin>

Values are stored like this, and it is always NAN...

# rrdtool fetch /var/lib/rrdcached/db/localhost/firewall-iptables/gauge-incoming-total.rrd AVERAGE
1696952880: -nan
1696952950: -nan
1696953020: -nan
1696953090: -nan
1696953160: -nan
1696953230: -nan
1696953300: -nan
1696953370: -nan
1696953440: -nan
1696953510: -nan
1696953580: -nan
1696953650: -nan
1696953720: -nan

But I can see some values if I 'export' them in plain text :

# tail -f /tmp/collectd/csv/localhost/firewall-iptables/gauge-incoming-total
1696953054.458,nan
1696953114.458,nan
1696953174.458,1.000000
1696953234.458,nan
1696953294.458,nan
1696953354.458,nan
1696953414.458,nan
1696953474.458,nan
1696953534.458,nan
1696953594.458,1.000000

Here is the part of my rrdgraph configuration. Any idea what's wrong and how can I do it?

args.append('{image_dir}/firewall-{period}.png'.format(**config))
args.extend(config['defaults'])
args.extend(['--start', config['start']])
args.extend(['--title', '"{title_firewall}{title_by_period}"'.format(**config)])
args.append('--slope-mode')
args.extend(['--lower-limit', '0'])
args.extend(['--vertical-label', '"Dropped connections"'])

args.append('DEF:citavg="{data_dir}/firewall-iptables/gauge-incoming-total.rrd":value:AVERAGE'.format(**config))
args.append('DEF:citmax="{data_dir}/firewall-iptables/gauge-incoming-total.rrd":value:MAX'.format(**config))

args.append('LINE1:citavg{color_firewall_total}:"Total           "'.format(**config))
args.append('GPRINT:citavg:AVERAGE:"%5.1lf%s Avg"')
args.append('GPRINT:citmax:MAX:"%5.1lf%s Max"')

args.append('COMMENT:"{last_update}"'.format(**config))

Thanks