In <OFE4EA0159.AF8C3FF1-ON852577AD.0070250F-852577AD.00709451 at csc.com> Matthew Moldvan <mmoldvan at csc.com> writes:
Not sure if this is a bug with RRD, or a change in the way RRD draws the trends graphs, but after the below YUM transaction (CentOS 5.5, Xymon 4.2.3-1), all of my graphs are now missing text (e.g. http://imgur.com/n8AGe.png).
Can anyone venture a guess as to why? Bug in RRD or in Xymon?
First, you need to find out which RRD library Xymon ends up using. Run an 'ldd $BBHOME/bin/hobbitgraph.cgi' and see whether it points to the 1.2.18 or 1.4.4 version of librrd.
My guess is that it uses the 1.2.18 version - it should, because that's probably the version you have compiled Xymon with. If it points to the new version, you could try re- compiling Xymon and see if that helps.
You can also try running rrdtool from the command line. Something like this should generate a graph for the "ping" test response times:
rrdtool graph test.png -s 'now-48h' -e now -t 'Ping times'
'DEF:p1=/home/xymon/data/rrd/myserver/tcp.conn.rrd:sec:AVERAGE'
'LINE2:p1#00FF00'
(Adjust the filename in the "DEF" setting to match whatever tcp.conn.rrd file you have for a server).
If the graph in "test.png" has the same problem, then it's an RRDtool problem.
Regards, Henrik