[PATCH] bootloader: grub: Add support for root on lvm.

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  • Michael Rohleder
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Michael Rohleder
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Michael Rohleder wrote on 31 Dec 2022 02:25
(address . guix-patches@gnu.org)(name . Michael Rohleder)(address . mike@rohleder.de)
20221231012511.5031-1-mike@rohleder.de

* gnu/bootloader/grub.scm (install-grub)
(install-grub-efi)
(install-grub-efi-removable)
(install-grub-efi32): Add setting GRUB_PRELOAD_MODULES to lvm.
* gnu/tests/install.scm (test-lvm-root-os): New variable.
---
gnu/bootloader/grub.scm | 9 +++++
gnu/tests/install.scm | 81 ++++++++++++++++++++++++++++++++++++++++-
2 files changed, 89 insertions(+), 1 deletion(-)

Toggle diff (163 lines)
diff --git a/gnu/bootloader/grub.scm b/gnu/bootloader/grub.scm
index ecd44e7f3c..1e2d142452 100644
--- a/gnu/bootloader/grub.scm
+++ b/gnu/bootloader/grub.scm
@@ -9,6 +9,7 @@
;;; Copyright © 2020 Stefan <stefan-guix@vodafonemail.de>
;;; Copyright © 2022 Karl Hallsby <karl@hallsby.com>
;;; Copyright © 2022 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
+;;; Copyright © 2022 Michael Rohleder <mike@rohleder.de>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -557,6 +558,8 @@ (define install-grub
;; Tell 'grub-install' that there might be a LUKS-encrypted
;; /boot or root partition.
(setenv "GRUB_ENABLE_CRYPTODISK" "y")
+ ;; Let us boot from lvm
+ (setenv "GRUB_PRELOAD_MODULES" "lvm")
;; Hide potentially confusing messages from the user, such as
;; "Installing for i386-pc platform."
@@ -629,6 +632,8 @@ (define install-grub-efi
;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or
;; root partition.
(setenv "GRUB_ENABLE_CRYPTODISK" "y")
+ ;; Let us boot from lvm
+ (setenv "GRUB_PRELOAD_MODULES" "lvm")
(invoke/quiet grub-install "--boot-directory" install-dir
"--bootloader-id=Guix"
"--efi-directory" target-esp)))))
@@ -652,6 +657,8 @@ (define install-grub-efi-removable
;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or
;; root partition.
(setenv "GRUB_ENABLE_CRYPTODISK" "y")
+ ;; Let us boot from lvm
+ (setenv "GRUB_PRELOAD_MODULES" "lvm")
(invoke/quiet grub-install "--boot-directory" install-dir
"--removable"
;; "--no-nvram"
@@ -675,6 +682,8 @@ (define install-grub-efi32
;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or
;; root partition.
(setenv "GRUB_ENABLE_CRYPTODISK" "y")
+ ;; Let us boot from lvm
+ (setenv "GRUB_PRELOAD_MODULES" "lvm")
(invoke/quiet grub-install "--boot-directory" install-dir
"--bootloader-id=Guix"
(cond ((target-x86?) "--target=i386-efi")
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index 4e0e274e66..f9d34c1e28 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -5,6 +5,7 @@
;;; Copyright © 2020 Danny Milosavljevic <dannym@scratchpost.org>
;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2020, 2021, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2022 Michael Rohleder <mike@rohleder.de>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -76,6 +77,7 @@ (define-module (gnu tests install)
%test-jfs-root-os
%test-f2fs-root-os
%test-xfs-root-os
+ %test-lvm-root-os
%test-lvm-separate-home-os
%test-gui-installed-os
@@ -831,7 +833,6 @@ (define %test-encrypted-root-os
;;; Separate /home on LVM
;;;
-;; Since LVM support in guix currently doesn't allow root-on-LVM we use /home on LVM
(define-os-with-source (%lvm-separate-home-os %lvm-separate-home-os-source)
(use-modules (gnu) (gnu tests))
@@ -913,6 +914,84 @@ (define %test-lvm-separate-home-os
`(,@command) "lvm-separate-home-os")))))
+
+;;;
+;;; LVM root device.
+;;;
+
+(define-os-with-source (%lvm-root-os %lvm-root-os-source)
+ (use-modules (gnu) (gnu tests))
+
+ (operating-system
+ (host-name "root-os-on-lvm")
+ (timezone "Europe/Paris")
+ (locale "en_US.utf8")
+
+ (bootloader (bootloader-configuration
+ (bootloader grub-bootloader)
+ (targets (list "/dev/vdb"))))
+ (kernel-arguments '("console=ttyS0"))
+
+ (mapped-devices (list (mapped-device
+ (source "vg0")
+ (target "vg0-root")
+ (type lvm-device-mapping))))
+ (file-systems (cons* (file-system
+ (device "/dev/mapper/vg0-root")
+ (mount-point "/")
+ (type "ext4")
+ (dependencies mapped-devices))
+ %base-file-systems))
+ (users %base-user-accounts)
+ (services (cons (service marionette-service-type
+ (marionette-configuration
+ (imported-modules '((gnu services herd)
+ (guix combinators)))))
+ %base-services))))
+
+(define %lvm-root-os-installation-script
+ "\
+. /etc/profile
+set -e -x
+guix --version
+
+export GUIX_BUILD_OPTIONS=--no-grafts
+parted --script /dev/vdb mklabel gpt \\
+ mkpart primary ext2 1M 3M \\
+ mkpart primary 3M 1.7G \\
+ set 1 boot on \\
+ set 1 bios_grub on
+pvcreate /dev/vdb2
+vgcreate vg0 /dev/vdb2
+lvcreate -l 100%FREE -n root vg0
+vgchange -ay
+mkfs.ext4 -L root-fs /dev/mapper/vg0-root
+mount /dev/mapper/vg0-root /mnt
+herd start cow-store /mnt
+mkdir /mnt/etc
+cp /etc/target-config.scm /mnt/etc/config.scm
+guix system init /mnt/etc/config.scm /mnt --no-substitutes
+sync
+reboot\n")
+
+(define %test-lvm-root-os
+ (system-test
+ (name "lvm-root-os")
+ (description
+ "Test functionality of an OS installed with a LVM / partition")
+ (value
+ (mlet* %store-monad ((image (run-install %lvm-root-os
+ %lvm-root-os-source
+ #:script
+ %lvm-root-os-installation-script
+ #:packages (list lvm2-static)))
+ (command (qemu-command* image
+ #:memory-size 512)))
+ (run-basic-test %lvm-root-os
+ `(,@command) "lvm-root-os")))))
+
+
+
;;;
;;; LUKS-encrypted /home, unencrypted root.
;;;
--
2.38.1
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