Re: [Condor-users] Upgrade Debian package without restarting Condor?

[Matthew Farrellee <matt@xxxxxxxxxx>]

Steffen Grunewald wrote:
> On Mon, Jan 12, 2009 at 12:52:14PM +0100, Steffen Grunewald wrote:
> > I'm looking for someone who might know how to upgrade Condor on a Debian
> > (or Ubuntu) system without restarting Condor (since that would have the
> > potential to kill running jobs - which is counterproductive, and condor_master
> > is supposed to tell when binaries have been updated).
> > Suggestions welcome!
>
> Hmmm. After removing "invoke.rc.d condor restart --configure" from the
> postinst script that had been used before, when testing an upgrade on a
> single node I get the following:
>
> 1/12 17:12:09 /usr/sbin/condor_master was modified, restarting /usr/sbin/condor_master.
> 1/12 17:12:09 Sent SIGTERM to STARTD (pid 3632)
> 1/12 17:12:09 Sent SIGTERM to CKPT_SERVER (pid 3633)
> 1/12 17:12:09 DaemonCore: pid 3632 exited with status 0, invoking reaper 1 <Daemons::AllReaper()>
> 1/12 17:12:09 The STARTD (pid 3632) exited with status 0
> 1/12 17:12:09 DaemonCore: return from reaper for pid 3632
> 1/12 17:12:09 DaemonCore: pid 3633 exited with status 0, invoking reaper 1 <Daemons::AllReaper()>
> 1/12 17:12:09 The CKPT_SERVER (pid 3633) exited with status 0
> 1/12 17:12:09 All daemons are gone.  Restarting.
> 1/12 17:12:09 Restarting master in 120 seconds.
> 1/12 17:12:09 DaemonCore: return from reaper for pid 3633
> 1/12 17:14:09 Doing exec( "/usr/sbin/condor_master" )
>
> Looking at the process table, condor_master is still the old one, only the
> daemons are new. 
>
> Since the node on which I ran the test was idle I didn't find out what would
> happen with actually running user jobs, and now I'm a bit worried whether
> there's a difference at all...
>
> Would someone please shed some light on this?
>
> Steffen

A SIGTERM to the Startd is a peaceful shutdown, e.g. it should let jobs 
complete before exiting.

The master is re-exec'ing itself. So it'll be the same PID, but a 
different executable.

Best,


matt