Failed to start service 'device-mapping

Failed to start service 'device-mapping

[Kete Foy]

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I checked my config.scm (attached), but I don't see any missing parens
or any discrepancy from Ludo's example
<https://lists.gnu.org/archive/html/guix-devel/2016-04/msg00964.html>. I
also based the rest on rain1's github wiki:
https://gitlab.com/rain1/guix-wiki/wikis/encrypted-home-config.scm.

I booted the computer, and Grub loaded the kernel. Then, the device
mapper failed to start, and apparently, every service afterward also
failed to start: user-processes, guix-daemon, term-tty6, dbus-system,
xorg-server, etc. I'm trying to run with an encrypted partition mounted
at /home.

Do I need to correct my config.scm and run the herd and guix system init
commands again?
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;; This is an operating system configuration template
;; for a "desktop" setup with GNOME and Xfce.

(use-modules (gnu) (gnu system nss))
(use-service-modules desktop)
(use-package-modules certs)

(operating-system
  (host-name "kantelope")
  (timezone "America/New_York")
  (locale "en_US.UTF-8")

  ;; Assuming /dev/sdX is the target hard disk, and "my-root"
  ;; is the label of the target root file system.
  (bootloader (grub-configuration (device "/dev/sda")))
  (mapped-devices (list (mapped-device
                         (source (uuid "ea0f857c-038b-4dda-b81f-39ad76210cfa"))
                         (target "crypthome")
                         (type luks-device-mapping))))

  (file-systems (cons* (file-system
                         (device "rootfs")
                         (title 'label)
                         (mount-point "/")
                         (type "ext4"))
                       (file-system
                         (device "/dev/mapper/crypthome")
                         (mount-point "/home")
                         (type "ext4"))
                      %base-file-systems))

  (users (cons (user-account
                (name "kete")
                (comment "")
                (group "users")
                (supplementary-groups '("wheel" "netdev"
                                        "audio" "video"))
                (home-directory "/home/kete"))
               %base-user-accounts))

  ;; This is where we specify system-wide packages.
  (packages (cons* nss-certs         ;for HTTPS access
                   %base-packages))

  ;; Add GNOME and/or Xfce---we can choose at the log-in
  ;; screen with F1.  Use the "desktop" services, which
  ;; include the X11 log-in service, networking with Wicd,
  ;; and more.
  (services (cons* (gnome-desktop-service)
                   (xfce-desktop-service)
                   %desktop-services))

  ;; Allow resolution of '.local' host names with mDNS.
  (name-service-switch %mdns-host-lookup-nss))

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Re: Failed to start service 'device-mapping

[Ludovic Courtès]

Kete Foy <kete@ninthfloor.org> skribis:

> I checked my config.scm (attached), but I don't see any missing parens
> or any discrepancy from Ludo's example
> <https://lists.gnu.org/archive/html/guix-devel/2016-04/msg00964.html>. I
> also based the rest on rain1's github wiki:
> https://gitlab.com/rain1/guix-wiki/wikis/encrypted-home-config.scm.
>
> I booted the computer, and Grub loaded the kernel. Then, the device
> mapper failed to start, and apparently, every service afterward also
> failed to start: user-processes, guix-daemon, term-tty6, dbus-system,
> xorg-server, etc. I'm trying to run with an encrypted partition mounted
> at /home.
>
> Do I need to correct my config.scm and run the herd and guix system init
> commands again?

>   (mapped-devices (list (mapped-device
>                          (source (uuid "ea0f857c-038b-4dda-b81f-39ad76210cfa"))
>                          (target "crypthome")
>                          (type luks-device-mapping))))

Are you sure the UUID is correct?  It must be a LUKS UUID, as returned
by “cryptsetup luksUUID /dev/sdXXYY”, not an ext2 UUID.

Also, the ability to use LUKS UUIDs like this was not available in
0.10.0.  So if you’re installing from the 0.10.0 USB image, you must
first ‘guix pull’.

Apart from that the config looks OK.

HTH!

Ludo’.

Re: Failed to start service 'device-mapping

[Kete Foy]

Ludovic Courtès:
> Are you sure the UUID is correct?  It must be a LUKS UUID, as returned
> by “cryptsetup luksUUID /dev/sdXXYY”, not an ext2 UUID.

No, that's probably what's wrong, Ludó, and thanks for the suggested
command.
> 
> Also, the ability to use LUKS UUIDs like this was not available in
> 0.10.0.  So if you’re installing from the 0.10.0 USB image, you must
> first ‘guix pull’.
> 
Ok, I better do that, too.

> Apart from that the config looks OK.
> 
Thanks, I might respond with results.

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Re: Failed to start service 'device-mapping

[Kete Foy]

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Ludovic Courtès:
> Are you sure the UUID is correct?  It must be a LUKS UUID, as returned
> by “cryptsetup luksUUID /dev/sdXXYY”, not an ext2 UUID.
> 
This actually gave me the same UUID, so I moved on to the next step
since the issue could have just been the lack of LUKS UUID functionality
in 0.10.

> Also, the ability to use LUKS UUIDs like this was not available in
> 0.10.0.  So if you’re installing from the 0.10.0 USB image, you must
> first ‘guix pull’.
> 
Everything went well, and I booted into Xfce. Thanks

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