From mboxrd@z Thu Jan 1 00:00:00 1970 From: swedebugia Subject: Re: GRUB fallback mechanism [was Re: Brain storming cool Guix features] Date: Sat, 12 Jan 2019 13:59:17 +0100 Message-ID: References: <87bm4wwrku.fsf@dismail.de> ; <20190111223212.GA31011@jasmine.lan>; Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----XQPSPDTHV9KAQRBEJHBM11LYTE4YG7" Content-Transfer-Encoding: 7bit Return-path: Received: from eggs.gnu.org ([209.51.188.92]:32937) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1giIsz-0003CK-Tl for guix-devel@gnu.org; Sat, 12 Jan 2019 07:59:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1giIsy-0003Ar-Pd for guix-devel@gnu.org; Sat, 12 Jan 2019 07:59:37 -0500 Received: from mx1.riseup.net ([198.252.153.129]:49614) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1giIsv-00032W-9b for guix-devel@gnu.org; Sat, 12 Jan 2019 07:59:35 -0500 In-Reply-To: <87bm4wwrku.fsf@dismail.de> ; <20190111223212.GA31011@jasmine.lan>; 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" To: Leo Famulari , L p R n d n Cc: "guix-devel@gnu.org" ------XQPSPDTHV9KAQRBEJHBM11LYTE4YG7 Content-Type: multipart/alternative; boundary="----N40F0RV9CUCUSP4PFY6JVYQLMMY2RB" Content-Transfer-Encoding: 7bit ------N40F0RV9CUCUSP4PFY6JVYQLMMY2RB Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Leo Famulari <leo@fa= mulari=2Ename> skrev: (11 januari 2019 23:32:12 CET)
On Mon, Jan 07, 2019 at 05:48:39PM +0100, L p R n d =
n wrote:
 - Currently, =
I think the only way for a GuixSD installation to break is
   if somethi=
ng goes wrong with the bootloader=2E Might be nice to have a
   tool (in=
 the install image I suppose) to recover the bootloader=2E
   Maybe 'gui=
x system init' can deal with that king of cases for now, I
   don't know=
, but a dedicated command might be able to use the original
   store, re=
store previous generations etc=2E

Apparently GRUB has a=
 feature that records a "fallback" system to boot
if booting fails=2E
Maybe when reconfiguring, Guix could set the current system as the
=
fallback so that it would always boot=2E

If we did that, we'd want t=
o warn the user somehow=2E=2E=2E not sure how to
achieve that=2E

=
Discussion of this feature at NixOS:

https://github=2Ecom/NixOS/nixp=
kgs/issues/26332

I don't = think automatic fallback is a good idea because it unnecessarily complicate= s a now well working simple part of the OS=2E
KISS is a nice principle=2E
--
Sent from my p=E2=89=A1p for Android=2E
------N40F0RV9CUCUSP4PFY6JVYQLMMY2RB Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Leo Famulari skrev: (11 januari 2019 23:32:12 CET) >On Mon, Jan 07, 2019 at 05:48:39PM +0100, L p R n d n wrote: >> - Currently, I think the only way for a GuixSD installation to break >is >> if something goes wrong with the bootloader=2E Might be nice to have >a >> tool (in the install image I suppose) to recover the bootloader=2E >> Maybe 'guix system init' can deal with that king of cases for now, >I >> don't know, but a dedicated command might be able to use the >original >> store, restore previous generations etc=2E > >Apparently GRUB has a feature that records a "fallback" system to boot >if booting fails=2E > >Maybe when reconfiguring, Guix could set the current system as the >fallback so that it would always boot=2E > >If we did that, we'd want to warn the user somehow=2E=2E=2E not sure how = to >achieve that=2E > >Discussion of this feature at NixOS: > >https://github=2Ecom/NixOS/nixpkgs/issues/26332 I don't think automatic fallback is a good idea because it unnecessarily c= omplicates a now well working simple part of the OS=2E=20 KISS is a nice principle=2E=20 --=20 Sent from my p=E2=89=A1p for Android=2E ------N40F0RV9CUCUSP4PFY6JVYQLMMY2RB-- ------XQPSPDTHV9KAQRBEJHBM11LYTE4YG7 Content-Type: application/pgp-keys; name="pEpkey.asc" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="pEpkey.asc"; size=3825 LS0tLS1CRUdJTiBQR1AgUFVCTElDIEtFWSBCTE9DSy0tLS0tCgptUUlOQkZ3Y25XMEJFQURhNWti U0t0ZEd6ZzQ1SjZkQnRFS21lZFM2bEtEQkx1UmlNZTRTNHppTFVMaVV5RTlWCmVNeTA0TUUzbFN6 WHg4TlpSNjVxSzdENDRhVlRvV29iUlcxMEhGWi9YOWh5bFlrcnFzUk45cndieW5mOTFrcU0KcVI2 TkRxQjJKRHZTek9LRzM0U2dnTzVkVGh1RE1GdzNmT3Z1cGhtSnN5b2s3OGVYQlFqTkxyaXNvQnhT SEFyVgpzZjdIMlJIYlNmTmZaclMxaEtUUzRtbFBpNnJZS2ZFMUFvbm8wdUs5SnVVZHBTTyswODdV ejhRam5GVTE5c09BClJWTWtUTnpuZk12MHVzeUsxSzc5U2pjYzJjTzhkNDRUalJlTGkxcFlHMjBV 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