Nielsen wrote:
Julian Elischer wrote:
I think we should introduce an "init" process for jails..
It would be responsible for all that the normal init is responsible for
except for being the default parent.. (some might argue for that too).
Sending it a particular signal would notify it to
send shutdown signals to all its compatriots in the jail etc.
This was necessary pre 5.2. Now that's it's possible to do all of this
from the host system (by adding a process to a jail) there's no real
need for an init type process anymore.
As Michal mentioned, utilities like 'jailer' or 'kjailer' used to be
necessary, but now a few simple utilities or scripts can manage a jail
from the host system just fine. If these utilities were found in FreeBSD
itself, it would round out the jail side of things nicely.
Of course I'm partial to my own 'jailutils' but others that served the
same purpose would work just as well.
http://memberwebs.com/nielsen/freebsd/jails/jailutils/
The only thing I miss from this change is the inability to have per-jail
consoles (which was possible with the 'jailer' package in 4.x), but
that's another topic.
I still prefer the idea of a per-jail init.
jsut because one can do it from outside doesn;t mean we SHOUDL do it from
outside..
For example the ability to have your own /etc/ttys to restart processes and
handle signals in the jail is easier done inside..
We could also suport it even better with a few kernel assists.
(e.g register an init with the kernel as the "official" init for the
jail).
Cheers,
Nate
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