From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=) Subject: Update on VM support Date: Tue, 15 Apr 2014 21:58:58 +0200 Message-ID: <87lhv6z7nh.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:33289) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wa9Ve-0001Xw-G8 for guix-devel@gnu.org; Tue, 15 Apr 2014 15:59:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wa9VV-0001Xl-G0 for guix-devel@gnu.org; Tue, 15 Apr 2014 15:59:10 -0400 Received: from hera.aquilenet.fr ([2a01:474::1]:58304) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wa9VV-0001Xd-9G for guix-devel@gnu.org; Tue, 15 Apr 2014 15:59:01 -0400 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id AD4751316 for ; Tue, 15 Apr 2014 21:58:59 +0200 (CEST) Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vDeySXblpSZ0 for ; Tue, 15 Apr 2014 21:58:59 +0200 (CEST) Received: from pluto (reverse-83.fdn.fr [80.67.176.83]) by hera.aquilenet.fr (Postfix) with ESMTPSA id 62DB3A4C for ; Tue, 15 Apr 2014 21:58:59 +0200 (CEST) List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org To: guix-devel@gnu.org Hello! A summary of the recent changes in (gnu system vm) & co.: =E2=80=A2 This module now uses QEMU=E2=80=99s 9p file system support (-vi= rtfs) to share files with the host (previously it used Samba to expose a CIFS share to the guest, because that=E2=80=99s what QEMU made easy to suppo= rt historically, but it was much slower, less flexible, and required a custom patch to share more than one directory.) =E2=80=A2 The build-side part of the code has been moved to (guix build v= m) and modularized. It is much more readable and flexible now. :-) =E2=80=A2 When building a VM that shares its store with the host, as with =E2=80=98guix system vm=E2=80=99, unionfs-fuse is used to get a writabl= e file system. That file system is the union of the real root provided by the image, which is read-only, and a writable tmpfs. That improves development and testing with =E2=80=98guix system vm=E2=80=99= . Some of it will also be reusable for the installation CD/USB key image. Ludo=E2=80=99.