Re: Upgrading CFE with CFE

[Paul Krizak]

We just accept that it will take a few runs before everything gets up to 
speed.

First run from cfexecd: binaries are overwritten, cfexecd stays the same
Upon reboot: cfagent gets called directly, which spawns a "new" cfexecd.

Not very elegant, but also not very complicated...requires just two 
extra lines of code.

Paul Krizak                         5900 E. Ben White Blvd. MS 625
Advanced Micro Devices              Austin, Tx  78741
CAD Systems Engineering             Phone: (512) 602-8775
Paul.Krizak@amd.com


Martin, Jason H wrote:
> My concern with having cfagent or a child thereof perform the update is
> this scenario:
> 1. cfexecd launches cfagent
> 2. Something called by cfagent (cf.preconf, shellcommand, proceses, etc)
> notices the change and kills cfexecd and cfservd in preparation for
> restarting them
> 3. cfexecd gets the kill signal and exits
> 4. cfagent gets a signal that cfexecd exited and exits. If it was
> performing the change, it exits before cfexecd is restarted.
> 5. If cf.preconf was performing the change, it gets a signal that
> cfagent exited and exits before cfservd / cfexecd is restarted.
> <splat>
>
> If that happens I would have to either resurrect everything via cfservd
> or get several people to each log in to a lot of machines to manually
> restart it. It is most preferential to avoid the latter :>
>
> The procedure I had in mind was:
> 1. cfexecd launches cfagent
> 2. cfagent overwrites cfagent / cfexecd / cfservd with the updated
> version.
> 3. cfagent kills and restarts cfservd
> 4. cfagent exits
> 5. cfagent is invoked via cfservd
> 6. cfagent kills and restarts cfexecd
> 7. Finish
>
> Has anyone tried that?
>
> Thank you,
> -Jason Martin
>
>
> > -----Original Message-----
> > From: David Masterson [mailto:dmasterson@vmware.com] 
> > Sent: Tuesday, October 25, 2005 1:19 PM
> > To: Martin, Jason H; help-cfengine@gnu.org
> > Subject: RE: Upgrading CFE with CFE
> >
> >
> > Martin, Jason H wrote:
> >
> > > Does anyone have any experience with upgrading large 
> >
> > installations of 
> >
> > > CFE with CFE?  Was there any particular order in which you 
> >
> > pushed the
> >
> > > three components?   Are there any gotchas if you are using 
> >
> > cfexecd to
> >
> > > launch cfengine instead of cron?
> >
> > Is this something you would use "cf.preconf" for?
> > --
> > David Masterson
> > VMware, Inc.
> > Palo Alto, CA
>
>
>
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