Cheshire Cat Computing

after setting the LogFormat: variable to rrdtool.

SuSE Linux Enterprise (SLES9, SP4). It already has rrdtool (v. 1.0.46) and mrtg (v2.10.13) installed and I can't uninstall them because of other dependencies that SuSE/Novell have put in.

So, I've installed mrtg 2.15.2 at /usr/local/mrtg-2/ and rrdtool 1.3.6 at /usr/local/rrdtool-1.3.6/. I followed the procedure at http://oss.oetiker.ch/rrdtool/doc/rrdbuild.en.html and eventually got rrdtool to build without errors (a story for another day).

Anyhow, I changed my master config file (/etc/mrtg/mrtg.cfg) and set the LogFormat: rrdtool variable. Also in there are 4 Include: directives. Restarted mrtg (/usr/local/mrtg-2/bin/mrtg --daemon /etc/mrtg/mrtg.cfg) and it just dies quietly. It actually starts to create one .rrd file for the first include file, but that's it.

I figure that the problem has to do with the extra versions of mrtg and rrdtool. Are there any logs that can tell me why mrtg is failing? I figure I need to add some PathAdd and/or LibAdd variables to the master cfg file, but which ones?

testweb:~ # find / -name "RRDs.pm"
/usr/lib/perl5/site_perl/5.8.3/Log/Log4perl/Appender/RRDs.pm
/usr/lib/perl5/vendor_perl/5.8.3/i586-linux-thread-multi/RRDs.pm
/usr/local/lib/perl5/site_perl/5.8.8/Log/Log4perl/Appender/RRDs.pm
/usr/local/rrdtool-1.3.6/lib/perl/5.8.8/i686-linux/RRDs.pm

testweb:~ # find / -name "RRDp.pm"
/usr/lib/perl5/vendor_perl/5.8.3/RRDp.pm
/usr/local/rrdtool-1.3.6/lib/perl/5.8.8/RRDp.pm

testweb:~ # perl --version
This is perl, v5.8.8 built for i686-linux

Hello mpjames,
If this is the same as mine was it's mrtg Seg faulting , can you try something like ...

/usr/local/mrtg-2/bin/mrtg --debug="base,snpo,snpo2,coca,repo,fork,time,log,eval,prof" $SOMECONF.cfg > ~/mrtg.log 2>&1

and then see if the file contains a Segmentation fault as the last entry , Or not as the case may be .
Hth , JimL

Yep, I got a seg fault. I guess I'll try re-compiling rrdtool and see what happens, unless you have another idea?

testweb:~ # /usr/local/mrtg-2/bin/mrtg --debug="base,snpo,snpo2,coca,repo,fork,t ime,log,eval,prof" /etc/mrtg/mrtg.cfg > ~/mrtg.log 2>&1
Segmentation fault

testweb:~ # cat mrtg.log
--time: prog start Thu Mar 12 13:05:19 2009
--base: Creating Lockfiles /etc/mrtg/mrtg.cfg_l,/etc/mrtg/mrtg.cfg_l_30289
--base: Reading Config File: /etc/mrtg/mrtg.cfg
--base: Reading Interface Config cache
--base: Checking Config File
--eval: libadd /usr/local/rrdtool-1.3.6/lib/perl/5.8.8/

--base: Loading RRD support
--base: Loading default Locale
--base: Starting main Loop
--time: loop start Thu Mar 12 13:05:19 2009
--base: Populate Target object by polling SNMP and external Datasources
--time: snmp read start Thu Mar 12 13:05:19 2009
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.10.10
--snpo: simple If: .15
--snpo: simple If: .15
--snpo: SNMPGet from public@192.168.10.10: -- ifInOctets.15,ifOutOctets.15
--snpo: SNMPfound -- '2669668442', '416318870'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.10.10
--snpo: simple If: .16
--snpo: simple If: .16
--snpo: SNMPGet from public@192.168.10.10: -- ifInOctets.16,ifOutOctets.16
--snpo: SNMPfound -- '1864182000', '767276627'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.10.10
--snpo: simple If: .17
--snpo: simple If: .17
--snpo: SNMPGet from public@192.168.10.10: -- ifInOctets.17,ifOutOctets.17
--snpo: SNMPfound -- '899829208', '3373659940'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.10.10
--snpo: simple If: .18
--snpo: simple If: .18
--snpo: SNMPGet from public@192.168.10.10: -- ifInOctets.18,ifOutOctets.18
--snpo: SNMPfound -- '4157501576', '3942571599'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.32.249
--snpo: simple If: .2
--snpo: simple If: .2
--snpo: SNMPGet from public@192.168.32.249: -- ifInOctets.2,ifOutOctets.2
--snpo: SNMPfound -- '1960168190', '4033312841'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.32.249
--snpo: simple If: .5
--snpo: simple If: .5
--snpo: SNMPGet from public@192.168.32.249: -- ifInOctets.5,ifOutOctets.5
--snpo: SNMPfound -- '2605882533', '3494833687'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@172.26.1.249
--snpo: simple If: .2
--snpo: simple If: .2
--snpo: SNMPGet from public@172.26.1.249: -- ifInOctets.2,ifOutOctets.2
--snpo: SNMPfound -- '4159917135', '2970651970'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@172.26.1.249
--snpo: simple If: .5
--snpo: simple If: .5
--snpo: SNMPGet from public@172.26.1.249: -- ifInOctets.5,ifOutOctets.5
--snpo: SNMPfound -- '3710703229', '479901950'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.72.249
--snpo: simple If: .5
--snpo: simple If: .5
--snpo: SNMPGet from public@192.168.72.249: -- ifInOctets.5,ifOutOctets.5
--snpo: SNMPfound -- '1477579591', '1402319289'
--snpo: run snmpget from ifInOctets&ifOutOctets:public@192.168.22.249
--snpo: simple If: .5
--snpo: simple If: .5
--snpo: SNMPGet from public@192.168.22.249: -- ifInOctets.5,ifOutOctets.5
--snpo: SNMPfound -- '4117794730', '1677551011'
--time: target loop start Thu Mar 12 13:05:19 2009
--base: Act on Router/Target 192.168.10.10_15
--base: Get Current values: in:2669668442, out:416318870, up:undef, name:undef, time:1236877519
--base: Create Graphics
--base: start RRDtool section
--base: maxi:192000, maxo:192000
--log: RRDs::tune(/opt/mrtg/192.168.10.10_15.rrd -a ds0:192000 -a ds1:192000 -d ds0:COUNTER -d ds1:COUNTER)
--prof: RRDs::tune /opt/mrtg/192.168.10.10_15.rrd - 0.001s
--log: RRDs::update(/opt/mrtg/192.168.10.10_15.rrd, '1236877519:2669668442:416318870')
testweb:~ #

Hello mpjames , I have the same problem with rrdtool 1.3.6 & mrtg 2.16.1 . I've contacted the "[rrd-developers]" maillist (Subject: MRTG , Segmentation Fault , After re-installing perl .) , If you are curious .
I've been rather remiss in getting back with the questions & request for further info. as I am a bit busy during the day & this problem is on a work system .
But I'll get back with them soon now that I have a reminder set up .

My cure was to edit 'mrtg' like so .
[code]
# update the rrd
$inlast = 'U' unless defined $inlast and $inlast =~ /\S/ and $inlast ne '##UNDEF##';
$outlast = 'U' unless defined $outlast and $outlast =~ /\S/ and $outlast ne '##UNDEF##';
+#
debug('log', "RRDs::update($dotrrd, '$time:$inlast:$outlast')");
my $start = gettimeofday();
my $rrddata;
- if ( $RRDs::VERSION >= 1.2 ){
- $rrddata=RRDs::updatev($dotrrd, "$time:$inlast:$outlast");
- } else {
+# if ( $RRDs::VERSION >= 1.2 ){
+#
+# $rrddata=RRDs::updatev($dotrrd, "$time:$inlast:$outlast");
+# } else {
+#
RRDs::update($dotrrd, "$time:$inlast:$outlast");
- }
+# }
+#
[/code]

well, that worked! thanks. I'm not into coding all that much - what exactly is broken?

Looks like a bug in RRDTool 1.3.6, I'm using 1.3.4 here for testing Routers2 and its OK. This has been reported to the developers list and Tobi so lets see what happens.

Steve

_________________
Steve Shipway
UNIX Systems, ITSS, University of Auckland, NZ
Woe unto them that rise up early in the morning... -- Isaiah 5:11

For Everyones Info , rrdtools-1.3.7 has been released and cure the issue with the 'SegFault' .
Hth , JimL

Thanks for the notification, and yay for the speed for Open Source development...

_________________
Steve Shipway
UNIX Systems, ITSS, University of Auckland, NZ
Woe unto them that rise up early in the morning... -- Isaiah 5:11