diff options
| -rw-r--r-- | doc/guix.texi | 25 | ||||
| -rw-r--r-- | gnu/system/linux-initrd.scm | 1 | ||||
| -rw-r--r-- | gnu/system/mapped-devices.scm | 25 | ||||
| -rw-r--r-- | gnu/tests/install.scm | 87 |
4 files changed, 134 insertions, 4 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 13fb4b1531..22102972a3 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -13758,7 +13758,6 @@ Guix extends this notion by considering any device or set of devices that are @dfn{transformed} in some way to create a new device; for instance, RAID devices are obtained by @dfn{assembling} several other devices, such as hard disks or partitions, into a new one that behaves as one partition. -Other examples, not yet implemented, are LVM logical volumes. Mapped devices are declared using the @code{mapped-device} form, defined as follows; for examples, see below. @@ -13771,7 +13770,8 @@ the system boots up. @item source This is either a string specifying the name of the block device to be mapped, such as @code{"/dev/sda3"}, or a list of such strings when several devices -need to be assembled for creating a new one. +need to be assembled for creating a new one. In case of LVM this is a +string specifying name of the volume group to be mapped. @item target This string specifies the name of the resulting mapped device. For @@ -13780,6 +13780,9 @@ specifying @code{"my-partition"} leads to the creation of the @code{"/dev/mapper/my-partition"} device. For RAID devices of type @code{raid-device-mapping}, the full device name such as @code{"/dev/md0"} needs to be given. +LVM logical volumes of type @code{lvm-device-mapping} need to +be specified as @code{"VGNAME-LVNAME"}. + @item targets This list of strings specifies names of the resulting mapped devices in case there are several. The format is identical to @var{target}. @@ -13803,6 +13806,11 @@ module for the appropriate RAID level to be loaded, such as @code{raid456} for RAID-4, RAID-5 or RAID-6, or @code{raid10} for RAID-10. @end defvr +@defvr {Scheme Variable} lvm-device-mapping +This defines LVM logical volume(s). Volume group is activated by +@command{vgchange} command from the package @code{lvm2}. +@end defvr + @cindex disk encryption @cindex LUKS The following example specifies a mapping from @file{/dev/sda3} to @@ -13860,6 +13868,19 @@ Note that the RAID level need not be given; it is chosen during the initial creation and formatting of the RAID device and is determined automatically later. +LVM logical volumes ``alpha'' and ``beta'' from volume group ``vg0'' can +be declared as follows: + +@lisp +(mapped-device + (source "vg0") + (target (list "vg0-alpha" "vg0-beta")) + (type lvm-device-mapping)) +@end lisp + +Devices @file{/dev/mapper/vg0-alpha} and @file{/dev/mapper/vg0-beta} can +then be used as the @code{device} of a @code{file-system} declaration +(@pxref{File Systems}). @node User Accounts @section User Accounts diff --git a/gnu/system/linux-initrd.scm b/gnu/system/linux-initrd.scm index 3e2f1282cc..85e493fecb 100644 --- a/gnu/system/linux-initrd.scm +++ b/gnu/system/linux-initrd.scm @@ -217,6 +217,7 @@ upon error." (gnu system file-systems) ((guix build utils) #:hide (delete)) (guix build bournish) ;add the 'bournish' meta-command + (srfi srfi-1) ;for lvm-device-mapping (srfi srfi-26) ;; FIXME: The following modules are for diff --git a/gnu/system/mapped-devices.scm b/gnu/system/mapped-devices.scm index 8b5aec983d..559c27bb28 100644 --- a/gnu/system/mapped-devices.scm +++ b/gnu/system/mapped-devices.scm @@ -36,7 +36,7 @@ #:autoload (gnu build linux-modules) (missing-modules) #:autoload (gnu packages cryptsetup) (cryptsetup-static) - #:autoload (gnu packages linux) (mdadm-static) + #:autoload (gnu packages linux) (mdadm-static lvm2-static) #:use-module (srfi srfi-1) #:use-module (srfi srfi-26) #:use-module (srfi srfi-34) @@ -64,7 +64,8 @@ check-device-initrd-modules ;XXX: needs a better place luks-device-mapping - raid-device-mapping)) + raid-device-mapping + lvm-device-mapping)) ;;; Commentary: ;;; @@ -304,4 +305,24 @@ TARGET (e.g., \"/dev/md0\"), using 'mdadm'." (open open-raid-device) (close close-raid-device))) +(define (open-lvm-device source targets) + #~(and + (zero? (system* #$(file-append lvm2-static "/sbin/lvm") + "vgchange" "--activate" "ay" #$source)) + ; /dev/mapper nodes are usually created by udev, but udev may be unavailable at the time we run this. So we create them here. + (zero? (system* #$(file-append lvm2-static "/sbin/lvm") + "vgscan" "--mknodes")) + (every file-exists? (map (lambda (file) (string-append "/dev/mapper/" file)) + '#$targets)))) + + +(define (close-lvm-device source targets) + #~(zero? (system* #$(file-append lvm2-static "/sbin/lvm") + "vgchange" "--activate" "n" #$source))) + +(define lvm-device-mapping + (mapped-device-kind + (open open-lvm-device) + (close close-lvm-device))) + ;;; mapped-devices.scm ends here diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm index 2d62a873ca..71caa3a493 100644 --- a/gnu/tests/install.scm +++ b/gnu/tests/install.scm @@ -67,6 +67,7 @@ %test-btrfs-root-on-subvolume-os %test-jfs-root-os %test-f2fs-root-os + %test-lvm-separate-home-os %test-gui-installed-os %test-gui-installed-os-encrypted @@ -798,6 +799,92 @@ build (current-guix) and then store a couple of full system images.") ;;; +;;; 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)) + + (operating-system + (host-name "separate-home-on-lvm") + (timezone "Europe/Paris") + (locale "en_US.utf8") + + (bootloader (bootloader-configuration + (bootloader grub-bootloader) + (target "/dev/vdb"))) + (kernel-arguments '("console=ttyS0")) + + (mapped-devices (list (mapped-device + (source "vg0") + (target "vg0-home") + (type lvm-device-mapping)))) + (file-systems (cons* (file-system + (device (file-system-label "root-fs")) + (mount-point "/") + (type "ext4")) + (file-system + (device "/dev/mapper/vg0-home") + (mount-point "/home") + (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-separate-home-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 ext2 3M 1.6G \\ + mkpart primary 1.6G 3.2G \\ + set 1 boot on \\ + set 1 bios_grub on +pvcreate /dev/vdb3 +vgcreate vg0 /dev/vdb3 +lvcreate -L 1.6G -n home vg0 +vgchange -ay +mkfs.ext4 -L root-fs /dev/vdb2 +mkfs.ext4 /dev/mapper/vg0-home +mount /dev/vdb2 /mnt +mkdir /mnt/home +mount /dev/mapper/vg0-home /mnt/home +df -h /mnt /mnt/home +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-separate-home-os + (system-test + (name "lvm-separate-home-os") + (description + "Test functionality of an OS installed with a LVM /home partition") + (value + (mlet* %store-monad ((image (run-install %lvm-separate-home-os + %lvm-separate-home-os-source + #:script + %lvm-separate-home-installation-script + #:packages (list lvm2-static) + #:target-size (* 3200 MiB))) + (command (qemu-command/writable-image image))) + (run-basic-test %lvm-separate-home-os + `(,@command) "lvm-separate-home-os"))))) + + +;;; ;;; Btrfs root file system. ;;; |