I could be wrong Chris but I think the prolog runs in a separate parent/child process tree than the job. You could put this kind of functionality into a starter_method where it does the NFS mounts and chroot actions then just runs the job script. the $JOB_ID will be in the environment and you can just take the rest of the command line arguments with $@ and pass them through. For an example of ‘something similar’ not exactly what you asked about but similar, have a look at Daniel Gruber’s blog entry: http://gridengine.eu/index.php/grid-engine-internals/226-using-open-containers-with-runc-in-a-univa-grid-engine-compute-cluster-2014-06-28
I see that Fritz replied as well with a slightly different answer. Regards, Bill. > On Jun 8, 2016, at 7:00 AM, Chris Dagdigian <d...@sonsorol.org> wrote: > > > Hey folks -- need my brain refreshed on prolog behavior ... > > Trying to figure out if a prolog script would be suitable for dramatically > changing the execution environment -- doing things like NFS filesystem > unmounts or chroot actions so that an incoming job would execute in the > changed environment. > > I can see the prolog running as 'me' and as a child of the sge_shepherd > daemon but I don't have enough of a test lab setup to confirm that the prolog > is running on the execution host and if the parent/child process relationship > is such that chroot jail actions performed by a prolog would be where the > jobscript ends up running.... > > Anyone have a quick answer? Thanks! > > Chris > > > > _______________________________________________ > users mailing list > users@gridengine.org > https://gridengine.org/mailman/listinfo/users William Bryce | VP Products Univa Corporation, Toronto E: bbr...@univa.com | D: 647-9742841 | Toll-Free (800) 370-5320 W: Univa.com | FB: facebook.com/univa.corporation | T: twitter.com/Grid_Engine
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