Date: Fri, 15 Jan 2016 09:38:50 -0553.75 From: "William A. Mahaffey III" <wam@hiwaay.net> Cc: FreeBSD Questions !!!! <freebsd-questions@freebsd.org> Subject: Re: 64 bit linux binary support Message-ID: <56991140.7000608@hiwaay.net> In-Reply-To: <CAHieY7Th1R3%2B=7TPikQ6vcRy7=_T1CdCAS=9DRX8u7-dufPh7w@mail.gmail.com> References: <5696740B.5070404@hiwaay.net> <CAHieY7ThPcq6NDCuz_M2TuQUJuU1ZMKQrUYBuUnn3Gm5sFnaDg@mail.gmail.com> <86si20mza9.fsf@gmail.com> <CAHieY7SbzFG0zLtj=FD3=_eNsN9Lu3LjmYGP09U1_AXxGf9J2A@mail.gmail.com> <5697B6DE.6000706@hiwaay.net> <CAHieY7Th1R3%2B=7TPikQ6vcRy7=_T1CdCAS=9DRX8u7-dufPh7w@mail.gmail.com>
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On 01/15/16 05:24, Alejandro Imass wrote: > On Thu, Jan 14, 2016 at 9:53 AM, William A. Mahaffey III <wam@hiwaay.net> wrote: >> On 01/14/16 08:27, Alejandro Imass wrote: >>> On Thu, Jan 14, 2016 at 1:49 AM, Malcolm Matalka <mmatalka@gmail.com> >>> wrote: >>>> Alejandro Imass <aimass@yabarana.com> writes: >>>> >>>>> On Wed, Jan 13, 2016 at 10:56 AM, William A. Mahaffey III >>>>> <wam@hiwaay.net> wrote: >>>>>> > [...] > >>> My response is pretty clear: Docker is pretty much like FreeBSD Jails >>> so why not use FBSD Jails (e.g. with EzJail) in the first place >>> instead of going through the trouble of getting a Linux-like jail >>> system to run on FreeBSD. And if you want/need Docker so bad then it >>> would probably be better to run on Linux to begin with. >>> > [...] > >> Hmmmm .... It's not so clear to me, but that might be a deficiency @ my end >> :-/. I would like to run 64-bit binaries compiled on/for linux boxen >> (specifically CentOS/RHEL 6) on my FreeBSD boxen, currently 3 in number, all >> various AMD64 CPUs, all running 9.3R. My question only involved docker to >> the extent that the docker wiki page alludes to apparently newly available >> (as of last summer) 64-bit linux binary support, which is what I am really >> interested in. >> > Perhaps you should look into bhyve, the FBSD Hypervisor Bhyve apparently not available for 9.3R. Virtualbox is there & works, but locks up (reserves) a fixed amount of CPU & RAM while running. It is a viable option, I was looking for something a bit 'lighter weight'. Again, my original question pertained to 64-bit linux binary support. 32-bit is there & working (linux ABI layer), I was just curious about how 64-bit was/is going. > >> I *AM* (separately) interested in docker, for various reasons. Specifically, >> I would want to use it as a lightweight VM system, which I *think* works >> under Linux. I.e. you can run a container of a non-native OS if it is CPU >> compatible w/ the host CPU. > AFAIK this is not the case. The reason Docker is lightweight to begin > with is because: > "Containers running on a single machine all share the same operating > system kernel so they start instantly and make more efficient use of > RAM" See https://wiki.freebsd.org/Myths, in the section about: 'FreeBSD Does Not Support Virtualisation' > > As I see it, Docker is nothing more than a copy of the FBSD Jail > system ported to Linux and with some sophistications that make it easy > to manage the images. > > Most of this can be done with FBSD Jails and especially with things like EzJail. > >> As I understand things, that is not feasible w/ >> jails, although I have found some URL's which claim otherwise. Clarification >> on that point would be welcome as well. I have asked before & been told it >> was *NOT* feasible, but maybe things have changed or I am missing something. >> TIA & have a good one. >> > IMO virtualization is not lightweight by definition. So you either > virtualize fully or pseudo-virtualize with chroot-like systems. > In this perspective I see Docker as nothing more than a sophisticated > chroot system just like FBSD Jails, only Linux-based and less mature > ;-) > > Best, > Alejandro Imass Thanks for all info so far. Have a good one :-). -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.
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