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Subject: Re: FreeBSD jail running a Debian or Centos distro
From: "Chad Leigh Shire.Net LLC" <chad@shire.net>
In-Reply-To: <CF647EB6-135F-4994-AD16-D2256A635001@ccsys.com>
Date: Fri, 25 Dec 2015 12:21:33 +0900
Cc: David Mehler <dave.mehler@gmail.com>,
 freebsd-questions <freebsd-questions@freebsd.org>
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To: Jake <milios@ccsys.com>
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> On Dec 25, 2015, at 11:52 AM, Jake <milios@ccsys.com> wrote:
>=20
>> On Dec 24, 2015, at 6:49 PM, Chad Leigh Shire.Net LLC =
<chad@shire.net> wrote:
>>=20
>>=20
>>> On Dec 25, 2015, at 8:41 AM, David Mehler <dave.mehler@gmail.com> =
wrote:
>>>=20
>>> Hello,
>>>=20
>>> Has anyone got a FreeBSD jail to run either a Centos or a Debian
>>> distro of Linux?
>>=20
>>=20
>> Because of how jails work, that is not possible.  Jails are like =
multiple user installations on a single kernel rooted with a facility =
like an =C3=BCber chroot, in general terms (more complicated than that =
of course).  It is not like separate VMs running.
>=20
> It is indeed possible to run the userland portion of a Linux-based =
distro, more-or-less unmodified, replacing the Linux kernel with =
FreeBSD's "linuxulator" (Linux ABI translation), all inside of a jail, =
atop a FreeBSD native filesystem. A great many things work (user-centric =
applications), a great many things break (system/network administrative =
tools).

That was not the question.   I know you can run a linux user land and =
apps but it is not the same as running a Centos or Debian distort of =
linux.

>=20
> Don't forget about possibly mounting linprocfs, linsysfs and fdescfs =
inside the jail for maximum success. I'm not certain of the current =
security implications of linprocfs and linsysfs, so don't take my advice =
without doing further investigation considering your use case. Depending =
on your use case, it's worth trying with and without the virtualized =
network stack options as well.