jail question

Alain Wolf wolf at k18.ch
Mon Feb 12 11:08:38 UTC 2007

On 11.02.2007 12:54, * Dino Vliet wrote:
> Hi folks,
> I'm installing a nice system to use as my multimedia
> box and already succeeded with geom-mirror. I want to
> use a jail to isolate the p2p applications like 
> amule/emule and want to make sure that they only write
> to an encrypted disk (currently RTFM on geli and gbde)
> However, I was wondering what happens with a jail if I
> update the host system due to a security issue or
> something else (recompile kernel and install world).
> Do I need to define the jail again? If not, won't the
> files in the jail stay at their previous versions
> although the host system has been updated to a new
> version?
> Or should I just RTFM on jails and come back a few
Unfortunately there is not much to read for end-users, like us.
> weeks from now:-)
> Thanks in advanced.

Its never been a problem for my systems. Two machines running 19 jails.
Done around a dozen system updates and also changing release from 6.0 to
6.2 using the same method was no problem at all.

First proceed as the handbook describes for the host-system.
After everything completes and your system and jails are up again
rebuild you jails with as follows:
# make -j4 buildworld
# mergemaster -p -D /jails/example
# make installworld DESTDIR=/jails/example
# mergemaster -D /jails/example

After that restart Jail. Done.

In my case I work with different make.conf files for jails and host
system, thats the reason why I rebuild world for the jails, If not you
can just make installworld without rebuilding. If you have multiple
jails, you can skip buildworld after first one.

Hope this helps.


More information about the freebsd-questions mailing list