On 20/04/2012 16:39, Harald Barth wrote:
I'm looking for any help and/or advice or better yet an example of a
working batch/cron system for writing to an afs file system.
I think the credentials should be long enough for worst job wall time
length at job submission time. So the credentials should be "stuffed
away" during qsub and then when the job is started the job start part
should forward the credentials into all batch nodes. That's how our
old and modified (hackish) easy does it. But it is old and modified
and should be replaced.
I did come across a project called AUKS
(http://auks.sourceforge.net/) which looks like it could do the job,
but it's not clear to me how to actually use it.
See
http://workshop.openafs.org/afsbpw10/wed_3_2.html
Thanks, that makes things clearer.
What I don't like with auksd is actually on slide 14
Single addressless credential per user
Stored in Auks Memory Cache
Provided to requesters without KDC interaction
Forwarding to thousands of peers without KDC interaction
I think I want KDC interaction when forwarding tickets and issuing service
tickets.
Am I right in thinking that for a batch system each node would need to
contact the auks server when a job started and request a kerberos TGT
for the account the job was running under? i.e. the auks server would
have to trust the requests it was getting from these nodes?
Andrew
For info we use a mixture of scientific linux 5 and 6 machines in
the group and use torque/maui for controlling the batch system. The
afs servers are all running openafs 1.6.0 on scientific linux 6.2
boxes.
I have looked at torque. Both at the gssapi branch and the cgroups
branch. I was not happy with what I saw. So I will continue to look at
slurm instead. Unfortunately other things pop up all the time, so I
can't say how much time I can spend on this. We mostly run Centos 5
and some 6 (yet another Redhat recompile like SC, but without the cool
"scientific" in its name).
Harald.
--
Andrew Pickford Email: [email protected]
Rm 473, Kelvin Building Telephone: +44 141 330 4197
Dept of Physics and Astronomy Fax: +44 141 330 5881
University of Glasgow ppewww.physics.gla.ac.uk/~pickford/
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