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Subject: Re: kernel && poudriere jails
To: Matthias Apitz <guru@unixarea.de>, freebsd-current@freebsd.org
References: <20151227174815.GA1783@c720-r285885-amd64>
From: Julian Elischer <julian@freebsd.org>
Message-ID: <5680A4C4.6030303@freebsd.org>
Date: Mon, 28 Dec 2015 10:56:04 +0800
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On 28/12/2015 1:48 AM, Matthias Apitz wrote:
> Hello,
>
> I have on a Dell M5500 my poudriere jails for amd64; the host system
> is at the moment r276659 (January 2015) and the jails are:
>
> r276659 (January 2015) + ports r392920 (July 2015)
> r276659 (January 2015) + ports r403255 (December 2015)
>
> I'm right now updating the host to r292778 (as of today) and will run
> new jails:
>
> r285885 (August 2015)   + ports r403255 (December 2015)
> r292778 (December 2015) + ports xxxxxxx (January 2016)
>
> My question is: will the two old jails based on r276659 still work on a
> host r292778?

My experience is that you are more likely to have problems in your 
existing setup because you should always try keep the kernel newer 
than the newest jail.
your new stup shoud just work.

In the one time I had problems, I fixed it by putting a copy of libc 
from the base into /lib/base/libc.so and using libmap.conf to make 
sure everyting used it.  I was an exceptional case however as the jail 
had some private changes so that doesn't really count.

>
> Thanks
>
> 	matthias
>