Re: [Openvds-devel] jail

[Andres L. Figari]

Dave,

Thanks for this, makes it more clear.

I use sphera and honestly, it sucks.  I can't begin to tell you how much I
hate it.  Anyways, I thought that maybe having an OS inside an OS would
provide people great flexibility by making it so that "anything" can be
installed in to the virtual environment.  Unlike Sphera where if you try to
alter the sednmail configuration you can't.  If you tryy to add modules it's
a pain.  I just want a virtual server to be just that, not a limited watered
down version with no real power.  With Sphera you get what it is or hit the
road.

What stimulated me about this jail thiung was just that.  You get a
realistic OS.  With root and everything.  Do you mind if I ask you another
question?  What about user mode linux?  That's more like jail right?

I obviously need to study freeVSD/openVDS more and how this differs :)

Andres

----- Original Message -----
From: "Dave Cost" <address@hidden>
To: <address@hidden>
Sent: Thursday, January 10, 2002 9:04 AM
Subject: RE: [Openvds-devel] jail


> Andres,
>
> Sure I've heard of jail and I'm also using it on production servers (even
if
> I'm moving everything over to openvds).
>
> Jail is a slightly more automated chroot.
>
> The jail function will recreate an environment the same way you could copy
> the shared libraries under linux and then chroot there. I recall there
were
> some slight differences at the kernel level, but that is what jail is all
> about.
>
> OpenVDS/FreeVSD are somewhat more elaborate. You have a daemon that
> understands what's going on. You have virtuald that knows what processes
to
> start so you don't need to have them running all the time. You have
> authentication and security and distributed control over several physical
> servers if you whish.
>
>  If we speak commercial (sphera, ensim) I can tell you that sphera is very
> close to what OpenVDS should have been one year ago if idaya didn't stop
> supporting it. Sphera even provides a name-based VDS which is something we
> cannot have ...yet. Sphera lacks the support of more domain names per
> virtual server but they're working on it.
>
> On the other hand the jail function of xxxBSD has been the same for a lot
of
> time and there seems to be no development in progress. Some ISP have used
it
> commercially, but I have not heard of a real commercial/opensource product
> like OpenVDS and Sphera and Ensim are. The FreeBSD is more do-it-yourself,
> altough rock solid and ... its still BDS. It's not linux and even if
> source-code compatibility exists, you'll find that packages still need
some
> porting to work there.
>
> So, to answer your question. We're not reinventing the wheel.... we're
> talking of engines here ;-)) ....
>
> Dave.
>
>
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