PPS Pilot Follow-up Meeting Minutes Mon 06 Jul 2009

• Date: Mon 06 Jul 2009
• Agenda: na
• Description: Pilot of glexec/SCAS: technical session about deployment issues at IN2P3
• Chair: Maarten Litmaath
• Home: PpsPilotSCAS

Attendance

• PPS, Atlas: Maarten Litmaath
• IN2P3 Pierre Girard
• SCAS/glexec development Oscar Koeroo, Mischa Salle

Summary

* glexec should be made independent of the glite-WN:
  - The glexec-WN meta-rpm should list all its dependencies.
    Released meta-rpm includes Globus; edg-mkgridmap should be removed.
  - A new environment variable GLEXEC_LOCATION indicates where glexec and
    its wrappers are located (in $GLEXEC_LOCATION/sbin):

    http://savannah.cern.ch/bugs/?52837

    If the variable is not set, VOs can fall back on what they do now.

* A dependencies tar ball should be provided for relocatable installations.
  A relocatable installation would need to have two directories put into
  /etc/ld.so.conf.d/glexec for the time being (see below):

    $GLEXEC_LOCATION/glite/lib
    $GLEXEC_LOCATION/globus/lib

* A source rpm should be provided for glexec itself (not its dependencies),
  so that it can be recompiled with a different location for the hard-coded
  configuration file.
  - This is needed for relocatable installations, like at IN2P3.

* A future version of glexec could have a RUNPATH (RPATH is obsolete)
  compiled into the executable, obviating the need for trusted directories
  to be named in /etc/ld.so.conf.d/glexec.

* Another approach would be to link glexec statically.
  - Does not deal with the plugins for LCAS/LCMAPS/SCAS.

* Future versions of glexec/LCAS/LCMAPS should be independent of Globus.
  - But VOMS libraries would still be needed.