Hi all. I've had a problem for the past couple of months and its not obvious what's at fault. I'm reasonably sure its not rrdtool though.
----------- Problem: Cacti shows no graphs. If I get the rrdtool command line out of cacti's "graph debug" section, and run that at the command line then I get the file at http://criggie.dyndns.org/crap/cacti-good.png RRDTool Command: /usr/bin/rrdtool graph - --imgformat=PNG --start=-86400 --end=-300 --title='testhing for CF 3T - Ping Latency' --base=1000 --height=120 --width=800 --alt-autoscale-max --lower-limit=0 --vertical-label='milliseconds' --slope-mode --font TITLE:9: --font AXIS:8: --font LEGEND:8: --font UNIT:8: DEF:a="/var/www/html/cacti/rra/testhing_for_cf_3t_ping_1053.rrd":ping:AVERAGE AREA:a#FFF200FF:"" GPRINT:a:LAST:"Current\:%8.2lf %s" GPRINT:a:AVERAGE:"Average\:%8.2lf %s" GPRINT:a:MAX:"Maximum\:%8.2lf %s" RRDTool Says: OK So this works fine when pasted to a command line, and produces a valid PNG file. ------------------------------------- When I do a wget on the file wget -c "http://192.168.100.198/cacti/graph_image.php?local_graph_id=821&rra_id=0&view_type=tree&graph_start=1290388765&graph_end=1290390565"; -O cacti-bad.png I get the file at http://criggie.dyndns.org/crap/cacti-bad.png Which is an invalid PNG file ----------------------------------- Now, the two output PNGs differ cacti-bad.png PNG image data, 1212437084 x 811347971, 135-bit cacti-good.png PNG image data, 903 x 202, 8-bit/color RGBA, non-interlaced $ ls -la *png -rw-r--r-- 1 cfalconer Domain Users 22180 Nov 19 13:34 cacti-bad.png -rw-r--r-- 1 cfalconer Domain Users 22860 Nov 19 13:35 cacti-good.png I've put an od -a at http://rrdtool.pastebin.ca/1998463 to show the differences. Now if I replace "\0" with nul in that file, its better but still not right. $ cat cacti-bad.png | sed "s/\\\0/\x00/g" > cacti-sed.png $ file cacti-sed.png PNG image data, 903 x 230, 8-bit/color RGBA, non-interlaced Therefore something is futzing with the data after it is generated by rrdtool. ------------------------------------ Other diagnostics: I have duplicated the entire cacti install to another host which is similarly configured. It works perfectly and shows the graphs fine. ------------------------------------ Details: Linux, Centos 5.5 running on an IBM x3250 in 32 bit mode # uname -srmopi Linux 2.6.18-194.8.1.el5.centos.plusPAE i686 i686 i386 GNU/Linux # rpm -q rrdtool cacti php-gd httpd php rrdtool-1.2.23-1.el5.rf cacti-0.8.7f-1.3t php-gd-5.1.6-27.el5 httpd-2.2.3-43.el5.centos.3 php-5.1.6-27.el5 ------------------------------------- Firstly I do not think rrdtool is the cause. I suspect its something to do with the way apache's httpd is getting the data back I have access to other servers configured basically the same way, and they're all working fine. Cacti is continuing to poll correctly in the background. The problem seems to be rrdtool's output being fiddled before it hits the end-user's browser. Any advice for fixing this would be appreciated. -- Craig Falconer The Total Team - Secure Networks for Serious Business Office: 0800 888 326 / +643 974 9128 Email: [email protected] Web: http://www.totalteam.co.nz/ _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
