Re: [Condor-devel] Is Redefining OpSys a Good Idea?

[Lans Carstensen <Lans.Carstensen@xxxxxxxxxxxxxx>]

Greetings!  On 09/13/2011 10:47 AM, Nick LeRoy wrote:
> On Tuesday, September 13, 2011 12:36:58 PM Douglas Thain wrote:
> > Howdy -
> >
> > I am about ready to throw in the towel on Linux compatibility.
> >
> > Programs compiled on RHEL5 don't run on RHEL6, and going
> > between Red Hat and Debian is a joke.  Our users get upset
> > every year during the upgrade cycle when nobody knows whether
> > their jobs will run correctly.
> >
> > We are already defining a custom attribute redhat_version which
> > is pulled from /etc/redhat-release via the startd cron, but everyone
> > forgets to do this and gets burned eventually.  I also don't see an obvious
> > way to programmatically get redhat_version into SUBMIT_EXPRS so
> > it matches automatically but also allows the smart user to remove the
> > requirement.
> >
> > In principle, I can just redefine OpSys to be "RHEL5" or "DEBIAN" instead
> > of "LINUX" in STARTD_EXPRS and SUBMIT_EXPRS, to make
> > it abundantly clear to users that these are completely different systems.
> >
> > However, is this a good idea?
> >
> > Is OpSys hard coded anywhere that would prevent this from working?
> >
> > Does anyone have a better solution to dealing with the Linux mess?
>
> See https://condor-wiki.cs.wisc.edu/index.cgi/tktview?tn=2366,21 .
>
> -Nick

Ouch.  Might I recommend going the LSB route instead of the distro 
route?  We prepped for some of that with the attached startd cron 
script.  What remains nasty is the requirements expression around the 
LSB version - but advertising and requiring ABI compatibility is the 
goal of this discussion, I believe.

-- Lans

#!/bin/sh
# $Id: DWA_LSB,v 1.1 2010/10/20 05:19:17 condor Exp $
# $Source: /studio/common/condor/templates/startd-bin/RCS/DWA_LSB,v $
# Advertise lsb_release information so jobs can match things like
# having LSB graphics API's or a particular release of RHEL
# Initially only DWA_LSB_Release will be used by the buildfarm
VERSION=`/usr/bin/lsb_release -v -s`
ID=`/usr/bin/lsb_release -i -s`
RELEASE=`/usr/bin/lsb_release -r -s`
echo "DWA_LSB_Version=\"$VERSION\""
echo "DWA_LSB_Id=\"$ID\""
echo "DWA_LSB_Release=$RELEASE"
exit 0