Cheshire Cat Computing

I am running (new install) the latest MRTG - RRD - and routers2.

Generating the *.cfg without the RRD lines runs standard MRTG and the graphs all update as expected. I have done this several times to ensure that snmp is running correctly and that new data is being acquired.

Adding the RRD lines to the *.cfg file does perform the expected conversions to RRD format. However, the only data displayed in the graphs is from when they were MRTG - nothing new. I have changed the withpeak and maxima options to every possible combination. I have set the IIS 6.0 to not cache my /graphs folder.

All of the values for In Out Min Max etc are displaying -1.#J

http://www.mobileps.com/cgi-bin/routers2.pl?page=verify seems to indicate everything is OK.

Any assistance will be gratly appreciated.

Check that you really are running MRTG every 5 mins on the .cfg files - remember you still need to do this to collect the data.

When MRTG runs, does it produce any error messages? Maybe this would help.

If you've just converted to rrdtool, does the user that MRTG runs as have write permission to the newly converted .rrd files?

routers2 seems to be running correctly, but your MRTG data-gathering is not. Check the error message output from the MRTG process.

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

Well, that was bizzare.

1. I went back and changed all of the .cfg files to REMOVE the 3 lines for rrd tool.
2. I let "regular" MRTG run for 2 hours to ensure that data collection was occurring.
3. I DELETED all of my rrd files.
4. I DELETED all of my existing graphs.
5. I changed all of the .cfg files to once again contain the 3 lines for rrd tool.
6. All rrd files were properly re-created.
7. All graphs are now working correctly.

There must have been sometype of file lock in there somewhere. Anyway - all is well now. THANKS.

Once I had this problem, and it turned out that the .rrd files were owned by root but the gathering process was owned by mrtg. This is because my first data run was done manually (as root) but subsequent ones ran as the correct mrtg user. Hence the files were read-only. Maybe this was the problem?

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

I suspect that the Windows equivilent was the problem.

I have written a Windows Service to read an xml file, run the cfgmaker, modify the .cfg files to utilize rrd, and perform data collection at specific intervals.

It turns out that when logged on to the system with Admin permissions everything was executing fine during development. Once I launched the service with local system rights, it was unable to update the rrd files. It did however update the mrtg html files.

If I get some spare time I plan to look into this a little deeper.

Thanks for all of your help.