VIMAGE

[Jamie Gritton]

Nikos Vassiliadis wrote:
> Julian Elischer wrote:
>> Peter Cornelius wrote:
>>> Re...
>>>
>>>> The situation is that right now jail and vimage are
>>>> orthogonal (ish) however in the future,
>>>> vimage will become a set of options on jail.
>>>
>>> Ah. SO it probably is kinda useless to try and stick a couple of 
>>> jails 'inside' a vimage.
>>
>> no you will be able to nest jails.
>> some of them may have the vimage options and some may not.
> 
> What about vimages without jails?
> I can imagine some applications of VIMAGE which completely
> lack user-space processing. If I recall correctly a jail
> exists as far there is at least one process associated with
> it. Would that be feasible?
> Having a vimage with no processes?

Jails will be able to exist without processes, and in fact with nothing
more than a vimage attached.  But much of vimage only makes sense in
conjunction with processes - a process attached to a vimage can see that
vimage's network interfaces.  There are still things like routing that
work independent of processes I suppose, but it seems to me much what a
vimage does is provide the network stack to the processes it's tied to.

- Jamie