[Beowulf] Regarding wulfstat

Robert G. Brown rgb at phy.duke.edu
Fri May 14 11:20:12 EDT 2004


On Fri, 14 May 2004, Jon Tegner wrote:

> Hi,

I reproduce the iprange behavior here, so that is just a plain old bug
and I'll fix it shortly, I hope.

The other I'm having a hard time reproducing, although I don't have a
lot of RH7.3 systems left to play with.  

While I'm trying, check that wulfstat is current (I just now posted
0.5.7 to both brahma and personal sites).  It has been substantially
rewritten with the most important change being that it now is based on a
library shared with both wulflogger and indirectly wulfweb (to
facilitate further development of client tools).

It also has better debugging.  If you build it from e.g. the tarball for
testing purposes, and put your failing wulfhosts specs into e.g.
wulfhosts.tst, then running:

  ./wulfstat -f wulfhosts.tst -v 1 2> log

should BOTH let you see wulfstat AND create a maximally verbose log of
what it is doing.  Let it run for maybe one update and quit wulfstat,
then look at the log.  It SHOULD tell you just what is failing in a
segment near the top like:

D_READHOST: Entering hostrange loop
Validating hostname = r00, port = 0
D_READHOST: Validating host:
D_READHOST: Starting name = |r00| hostip = || inetaddress = |33b60398| port = |0|
D_READHOST: Looking up ip number for host r00.
D_READHOST: Got host_id = 42134b58.
D_READHOST: Setting ip_tmp to 192.168.182.50
D_READHOST: Reset hostip from 
D_READHOST: hostip is now 192.168.182.50
D_READHOST: Setting inetaddr from hostip 192.168.182.50
D_READHOST: Setting host r00's port = 7887
D_READHOST: Cleaned up host r00 (we hope).
D_READHOST: Ending name = r00 hostip = 192.168.182.50 inetaddress = 32b6a8c0  port = 7887
Validating hostname = r01, port = 0
D_READHOST: Validating host:
D_READHOST: Starting name = |r01| hostip = || inetaddress = |32b6a8c0| port = |0|
D_READHOST: Looking up ip number for host r01.
D_READHOST: Got host_id = 42134b58.
D_READHOST: Setting ip_tmp to 192.168.182.51
D_READHOST: Reset hostip from 
D_READHOST: hostip is now 192.168.182.51
D_READHOST: Setting inetaddr from hostip 192.168.182.51
D_READHOST: Setting host r01's port = 7887
D_READHOST: Cleaned up host r01 (we hope).
D_READHOST: Ending name = r01 hostip = 192.168.182.51 inetaddress = 33b6a8c0  port = 7887

Obviously it works here, and should clearly indicate it if the problem
is e.g. something not resolving.

> Any help/hints on this would be appreciated. And Thank You Robert for a 
> nice little program!

You're welcome and I'm glad you are enjoying it.  You should check out
wulflogger and wulfweb (the latter is pretty heavily beta still, but
works) if you haven't.  You can see what wulfweb can do (very crudely
still -- don't have time to really pretty this up yet) on:

  http://www.phy.duke.edu/resources/computing/brahma/wulfweb/wulfweb.html

Our local users like this better than wulfstat in a lot of cases,
although I don't have any of the other views done yet.  I don't think it
is as useful for admins or serious users, though -- I tend to run it at
a time granularity of around a minute because updates bollix old/stupid
browsers.

I'll get back to you when I've fixed iprange.  This is an egregious
failure, so it is probably a simple enough bug.

   rgb

-- 
Robert G. Brown	                       http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567  Fax: 919-660-2525     email:rgb at phy.duke.edu



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