PBS with AFS

Jeff Squyres jsquyres at lsc.nd.edu
Wed Nov 15 20:58:25 EST 2000


The Laboratory for Scientific Computing at the University of Notre Dame is
pleased to release version 1.1 of the Password Storage and Retrieval (PSR)
package.  PSR allows PBS jobs to run with AFS authentication, and will
guarantee that the AFS authentication remains valid for the entire
duration of the PBS job (even if the job lasts longer than the default
life of the user's AFS token).

Version 1.1 of PSR can be downloaded from its official home page:

	http://www.mpi.nd.edu/lam/software/psr/

PSR uses strong public-key encryption to store and retrieve user's
passwords.  When a PBS job is submitted, the user's password is decrypted
and used to obtain an AFS token.  A "shepherd" process is forked into the
background and will wake up one hour before it expires in order to renew
the token.  This process repeats until the job has completed.

PSR includes a short patch to enable it to automatically work with OpenPBS
versions 2.3 and 2.3.2.  However, PSR's store/retrieve scheme is general
enough such that it can be extended to just about any automated job system
where passwords are required for authentication/authorization.

See the web site for full documentation of the PSR package, as well as a
longer explanation of how the package works.

Since one of the primary purposes of PSR is to run with AFS
authentication, its programs must be compiled against AFS development
libraries.  Either the Transarc proprietary AFS development libraries or
the krb4 freeware AFS libraries may be used.  Additionally, the RSAREF
library is used for encryption/decryption of user passwords.  
References/links to obtain these libraries are available on the web site.

This is the first official release of the PSR package.  Questions,
comments, and suggestions are welcome.  Please submit them to the LAM/MPI
user's mailing list (we monitor the PBS list as well, but not nearly as
much as our own list :-).  See:

	http://www.mpi.nd.edu/lam/contact.php3#lam-mailing-list

---

PSR was originally written by Dale Southard of the University of Notre
Dame in order to be able to run PBS jobs with AFS authentication.  Dale
has since left the University, and he bequeathed the code base to the
LAM/MPI developers.  We have updated the code for OpenPBS, fixed a few
bugs, cleaned up the build/install process, and renamed the package to be
"Password Storage and Retrieval".

{+} Jeff Squyres
{+} squyres at cse.nd.edu
{+} Perpetual Obsessive Notre Dame Student Craving Utter Madness
{+} "I came to ND for 4 years and ended up staying for a decade"



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