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RE: [Openvds-devel] jail
From: |
Esparza, Dan |
Subject: |
RE: [Openvds-devel] jail |
Date: |
Thu, 10 Jan 2002 08:42:49 -0700 |
Usermode linux is just that -- it's a 'usermode' kernel that you can use
to boot up several instances of the kernel. It has some limitations and
is (understandably) processor bound -- but it's pretty slick for what it
does.
Dan
> -----Original Message-----
> From: Andres L. Figari [mailto:address@hidden
> Sent: Thursday, January 10, 2002 8:40 AM
> To: address@hidden
> Subject: Re: [Openvds-devel] jail
>
>
> 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.
> >
> >
> > _______________________________________________
> > Openvds-devel mailing list
> > address@hidden
> > http://mail.freesoftware.fsf.org/mailman/listinfo/openvds-devel
>
>
> _______________________________________________
> Openvds-devel mailing list
> address@hidden
> http://mail.freesoftware.fsf.org/mailman/listinfo/openvds-devel
>
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