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Re: guix system init with mounted btrfs


From: Matt Huszagh
Subject: Re: guix system init with mounted btrfs
Date: Mon, 24 Jun 2019 10:54:37 -0700

Efraim Flashner <address@hidden> writes:
> I spent some time yesterday with the arch wiki and I have an idea.
> assuming you're using %desktop-services, inside services:
>
> (modify-services %desktop-services
>   (udev-service-type config =>
>                      (udev-configuration
>                      (inherit config)
>                      (rules (list lvm2 fuse alsa-utils crda btrfs)))))
>
> Perhaps adding the udev rules for btrfs will force it to run 'btrfs
> device scan' or whatever the magic is that it apparently isn't running
> now.

Efraim, is btrfs supposed to btrfs-progs here? I believe rules takes
package names right? In any event I tried this and it didn't work for me.
Did you have success with it?

On Mon, Jun 24, 2019 at 7:51 AM Matt Huszagh <address@hidden> wrote:

> Efraim Flashner <address@hidden> writes:
> > I spent some time yesterday with the arch wiki and I have an idea.
> > assuming you're using %desktop-services, inside services:
> >
> > (modify-services %desktop-services
> >   (udev-service-type config =>
> >                      (udev-configuration
> >                      (inherit config)
> >                      (rules (list lvm2 fuse alsa-utils crda btrfs)))))
> >
> > Perhaps adding the udev rules for btrfs will force it to run 'btrfs
> > device scan' or whatever the magic is that it apparently isn't running
> > now.
>
> Thanks for the suggestion Efraim. I don't currently use desktop
> services, just base-services at the moment. However, I'm concerned there
> may still be an issue with this modification. I'm currently only getting
> prompted for 1 of 2 LUKS device passphrases, which I believe is an issue
> with the grub bootloader (which in my case is an efi shell program). I'm
> getting stuck at the grub rescue prompt and so I don't even get to the
> initial ramdisk stage. Is that where these services kick in, or does
> that happen later when the full kernel is loaded? When I mount the btrfs
> root fs manually, I have to decrypt both devices before I can run btrfs
> device scan.
>
> To address the grub issue I've tried doing:
> grub rescue> insmod luks
> grub rescue> cryptomount -a
>
> However, that doesn't appear to have any effect. I've also tried
> modifying grub.cfg directly and reinstalling the bootloader by chrooting
> and running grub-install, but that doesn't work for reasons that seem to
> be related to the guix way of doing things. Since I'm still new to Guix,
> I don't know how one might make custom modifications to the cfg file.
>


-- 

*Matt Huszagh*
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