[Xymon] List of graphs of a devmon test is too long

[W.J.M. Nelis]

Hello,


A follow-up on my own question:

> we are using xymon 4.3.7 and devmon 0.3.1-beta1, r233. Some of the
> devmon tests on interfaces of switches and routers use the rrd collector
> of xymon. Those tests contain thus both a table and additionally one
> graph per interface. However, for *each* test using the devmon rrd
> collector there are three additional pointers to non-existing graphs.
> The number of additional non-existing graphs is thus independent of the
> number of interfaces being monitored.
>
> The following is the page source of a test to check for packet drops on
> 3 interfaces of a router:
>
> <TR><TD ALIGN=LEFT><H3>  Thu 2012.02.23 10:58:22</H3>
> <PRE>
>
> <b>Interface discards:</b>
> Input  discard load alert thresholds: yellow=5.0%, red=10.0%
> Output discard load alert thresholds: yellow=5.0%, red=10.0%
>
> <table border=1 cellpadding=5>
> <tr><th>If name</th><th>Packet rate in</th>  ...</tr>
>
> <tr><td>eth0</td><td>10.55</td>  ...</tr>
> <tr><td>eth1</td><td>18.05</td>  ...</tr>
>
> <tr><td>eth2</td><td>0.00</td>  ...</tr>
> <tr><td>wlan0</td><td>4.37</td>  ...</tr>
>
> </table>
> <!--DEVMON RRD: if_dsc 0 0
> DS:InDiscard:COUNTER:600:0:U DS:OutDiscard:COUNTER:600:0:U
> eth0 14585:0
> eth1 37:0
> eth2 0:0
> -->
>
> Note:
> Discard rate: Number of discards per second
> Discard load: Number of discards per packet
>
>
> Devmon version 0.3.1-beta1-r233 running on sodn164u
>
> </PRE>
> </TD></TR></TABLE>
> <br><br>
> <table align="center" border=0 summary="Status report info">
> <tr><td align="center"><font COLOR="#87a9e5" SIZE="-1">Status unchanged in 6 days,21 hours, 2 minutes<br>
> Status message received from 137.17.28.26<br>
> </font></td></tr>
> </table>
> <!-- linecount=6 -->
> <table summary="devmon:if_dsc Graph"><tr><td><A HREF="/xymon-cgi/showgraph.sh?host=nlrcve02-lan&service=devmon:if_dsc&graph_width=576&graph_height=120&first=1&count=1 ...
> <table summary="devmon:if_dsc Graph"><tr><td><A HREF="/xymon-cgi/showgraph.sh?host=nlrcve02-lan&service=devmon:if_dsc&graph_width=576&graph_height=120&first=2&count=1 ...
> <table summary="devmon:if_dsc Graph"><tr><td><A HREF="/xymon-cgi/showgraph.sh?host=nlrcve02-lan&service=devmon:if_dsc&graph_width=576&graph_height=120&first=3&count=1 ...
> <table summary="devmon:if_dsc Graph"><tr><td><A HREF="/xymon-cgi/showgraph.sh?host=nlrcve02-lan&service=devmon:if_dsc&graph_width=576&graph_height=120&first=4&count=1 ...
> <table summary="devmon:if_dsc Graph"><tr><td><A HREF="/xymon-cgi/showgraph.sh?host=nlrcve02-lan&service=devmon:if_dsc&graph_width=576&graph_height=120&first=5&count=1 ...
> <table summary="devmon:if_dsc Graph"><tr><td><A HREF="/xymon-cgi/showgraph.sh?host=nlrcve02-lan&service=devmon:if_dsc&graph_width=576&graph_height=120&first=6&count=1 ...
>
>
> The (very) long lines have been truncated, at the "...", to enhance the
> readability. In subdirectory ~xymon/data/rrd/nlrcve02-lan there are 3
> RRDs, not 6.
>
> How xymon does determine the linecount, 6 in the example above, is not
> clear to me. However, it is the number of lines in the HTML comment
> section containing the RRD data, which is always 3 more than the number
> of interfaces.
>
> How can I configure xymon in such a way that the number of graphs
> matches the number of interfaces?
I've modified Devmon to send a linecount too. The patch to module 
dm-tests.pm is:

Index: dm_tests.pm
===================================================================
--- dm_tests.pm (revision 85)
+++ dm_tests.pm (working copy)
@@ -2118,10 +2119,11 @@
          for my $name (keys %rrd) {

            my $set_data = '';
-          my $temp_data = '';
+          my $temp_data= '';
            my $dir      = $rrd{$name}{'dir'};
            my $pri      = $rrd{$name}{'pri'};
            my $do_max   = $rrd{$name}{'do_max'};
+          my $linecount= 0 ;

            do_log("Couldn't fetch primary oid for rrd set $name")
              and next if $pri eq 'pri';
@@ -2151,10 +2153,12 @@
              $set_data .= "$pri_val ";
              $set_data .= "$temp_data";
              $set_data =~ s/:$/\n/;
+            $linecount++ ;

            }

            $set_data =~ s/[\/&+\$]/_/gs;
+          $msg .= "<!-- linecount=$linecount -->\n" ;
            $msg .= "$header\n$set_data-->\n";

          }

Using this patch, there are no more broken graphs.

Regards,
   Wim Nelis.




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