From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@gnu.org>
Subject: Re: Remounting tmpfs
Date: Tue, 09 Apr 2019 16:58:46 +0200
Message-ID: <877ec3fcnt.fsf@gnu.org>
References: <80844c75-50c6-ff82-6693-db6af0f10551@fastmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Return-path: <help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([209.51.188.92]:53839)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <ludo@gnu.org>) id 1hDsD6-0003R0-BL
	for help-guix@gnu.org; Tue, 09 Apr 2019 10:58:53 -0400
In-Reply-To: <80844c75-50c6-ff82-6693-db6af0f10551@fastmail.com>
	(7e9wc56emjakcm@s.rendaw.me's message of "Mon, 8 Apr 2019 04:33:51
	+0900")
List-Id: <help-guix.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/help-guix>,
	<mailto:help-guix-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/help-guix/>
List-Post: <mailto:help-guix@gnu.org>
List-Help: <mailto:help-guix-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/help-guix>,
	<mailto:help-guix-request@gnu.org?subject=subscribe>
Errors-To: help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org
Sender: "Help-Guix" <help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org>
To: 7e9wc56emjakcm@s.rendaw.me
Cc: help-guix@gnu.org

Hello,

7e9wc56emjakcm@s.rendaw.me skribis:

> On a system I'm porting to guix I have 2GB tmpfs with subdirectories
> like /tmpfs/etc that I remount to /etc with an overlay filesystem.
>
> The current way I do this in systemd is making a service dependency
> between the /tmpfs and /etc mounts that mkdirs /tmpfs/etc and
> /tmpfs/etc_work, but AFAICT filesystem definitions in guix can only have
> filesystem dependencies.
>
> Are there any other ways I can do this without copying/pasting/modifying
> gobs of core guix code into my system definition?  Like somehow
> appending (mkdir /tmpfs/etc) onto the tmpfs filesystem service start
> procedure or something.

In Guix /etc is mostly populated by =E2=80=9Cactivation programs=E2=80=9D, =
which are
generated from your config.  So I=E2=80=99m not sure what you describe would
make much sense.

Now, you could try to add a file system declaration that mounts /etc,
with (needed-for-boot? #t).

HTH,
Ludo=E2=80=99.