83de7ee662
This is a follow-up of 41f27bf8702838f19b1dc5ffee8eec1d4315d4e6. * gnu/system/image.scm (operating-system-for-image): Force "volatile-root?" to true when producing ISO images.
686 lines
24 KiB
Scheme
686 lines
24 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2020 Mathieu Othacehe <m.othacehe@gmail.com>
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;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu system image)
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#:use-module (guix diagnostics)
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#:use-module (guix discovery)
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#:use-module (guix gexp)
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#:use-module (guix modules)
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#:use-module (guix monads)
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#:use-module (guix records)
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#:use-module (guix store)
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#:use-module (guix ui)
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#:use-module (guix utils)
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#:use-module ((guix self) #:select (make-config.scm))
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#:use-module (gnu bootloader)
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#:use-module (gnu bootloader grub)
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#:use-module (gnu image)
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#:use-module (gnu services)
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#:use-module (gnu services base)
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#:use-module (gnu system)
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#:use-module (gnu system file-systems)
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#:use-module (gnu system uuid)
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#:use-module (gnu system vm)
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#:use-module (guix packages)
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#:use-module (gnu packages base)
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#:use-module (gnu packages bootloaders)
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#:use-module (gnu packages cdrom)
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#:use-module (gnu packages disk)
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#:use-module (gnu packages gawk)
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#:use-module (gnu packages genimage)
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#:use-module (gnu packages guile)
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#:autoload (gnu packages gnupg) (guile-gcrypt)
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#:use-module (gnu packages hurd)
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#:use-module (gnu packages linux)
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#:use-module (gnu packages mtools)
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#:use-module (gnu packages virtualization)
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#:use-module ((srfi srfi-1) #:prefix srfi-1:)
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#:use-module (srfi srfi-11)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (rnrs bytevectors)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:export (root-offset
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root-label
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esp-partition
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root-partition
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efi-disk-image
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iso9660-image
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arm32-disk-image
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arm64-disk-image
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image-with-os
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raw-image-type
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qcow2-image-type
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iso-image-type
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uncompressed-iso-image-type
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arm32-image-type
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arm64-image-type
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image-with-label
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system-image
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%image-types
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lookup-image-type-by-name))
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;;;
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;;; Images definitions.
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;;;
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;; This is the offset before the first partition. GRUB will install itself in
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;; this post-MBR gap.
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(define root-offset (* 512 2048))
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;; Generic root partition label.
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(define root-label "Guix_image")
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(define esp-partition
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(partition
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(size (* 40 (expt 2 20)))
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(offset root-offset)
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(label "GNU-ESP") ;cosmetic only
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;; Use "vfat" here since this property is used when mounting. The actual
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;; FAT-ness is based on file system size (16 in this case).
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(file-system "vfat")
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(flags '(esp))
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(initializer (gexp initialize-efi-partition))))
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(define root-partition
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(partition
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(size 'guess)
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(label root-label)
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(file-system "ext4")
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(flags '(boot))
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(initializer (gexp initialize-root-partition))))
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(define efi-disk-image
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(image
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(format 'disk-image)
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(partitions (list esp-partition root-partition))))
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(define iso9660-image
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(image
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(format 'iso9660)
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(partitions
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(list (partition
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(size 'guess)
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(label "GUIX_IMAGE")
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(flags '(boot)))))))
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(define arm32-disk-image
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(image
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(format 'disk-image)
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(target "arm-linux-gnueabihf")
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(partitions
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(list (partition
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(inherit root-partition)
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(offset root-offset))))
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;; FIXME: Deleting and creating "/var/run" and "/tmp" on the overlayfs
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;; fails.
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(volatile-root? #f)))
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(define arm64-disk-image
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(image
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(inherit arm32-disk-image)
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(target "aarch64-linux-gnu")))
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;;;
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;;; Images types.
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;;;
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(define-syntax-rule (image-with-os base-image os)
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"Return an image inheriting from BASE-IMAGE, with the operating-system field
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set to the given OS."
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(image
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(inherit base-image)
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(operating-system os)))
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(define raw-image-type
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(image-type
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(name 'raw)
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(constructor (cut image-with-os efi-disk-image <>))))
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(define qcow2-image-type
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(image-type
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(name 'qcow2)
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(constructor (cut image-with-os
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(image
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(inherit efi-disk-image)
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(name 'image.qcow2)
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(format 'compressed-qcow2))
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<>))))
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(define iso-image-type
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(image-type
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(name 'iso9660)
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(constructor (cut image-with-os iso9660-image <>))))
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(define uncompressed-iso-image-type
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(image-type
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(name 'uncompressed-iso9660)
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(constructor (cut image-with-os
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(image
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(inherit iso9660-image)
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(compression? #f))
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<>))))
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(define arm32-image-type
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(image-type
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(name 'arm32-raw)
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(constructor (cut image-with-os arm32-disk-image <>))))
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(define arm64-image-type
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(image-type
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(name 'arm64-raw)
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(constructor (cut image-with-os arm64-disk-image <>))))
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;;
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;; Helpers.
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;;
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(define not-config?
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;; Select (guix …) and (gnu …) modules, except (guix config).
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(match-lambda
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(('guix 'config) #f)
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(('guix rest ...) #t)
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(('gnu rest ...) #t)
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(rest #f)))
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(define (partition->gexp partition)
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"Turn PARTITION, a <partition> object, into a list-valued gexp suitable for
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'make-partition-image'."
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#~'(#$@(list (partition-size partition))
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#$(partition-file-system partition)
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#$(partition-file-system-options partition)
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#$(partition-label partition)
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#$(and=> (partition-uuid partition)
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uuid-bytevector)))
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(define gcrypt-sqlite3&co
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;; Guile-Gcrypt, Guile-SQLite3, and their propagated inputs.
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(srfi-1:append-map
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(lambda (package)
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(cons package
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(match (package-transitive-propagated-inputs package)
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(((labels packages) ...)
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packages))))
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(list guile-gcrypt guile-sqlite3)))
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(define-syntax-rule (with-imported-modules* gexp* ...)
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(with-extensions gcrypt-sqlite3&co
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(with-imported-modules `(,@(source-module-closure
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'((gnu build vm)
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(gnu build image)
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(gnu build bootloader)
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(gnu build hurd-boot)
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(gnu build linux-boot)
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(guix store database))
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#:select? not-config?)
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((guix config) => ,(make-config.scm)))
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#~(begin
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(use-modules (gnu build vm)
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(gnu build image)
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(gnu build bootloader)
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(gnu build hurd-boot)
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(gnu build linux-boot)
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(guix store database)
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(guix build utils))
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gexp* ...))))
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(define (root-partition? partition)
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"Return true if PARTITION is the root partition, false otherwise."
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(member 'boot (partition-flags partition)))
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(define (find-root-partition image)
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"Return the root partition of the given IMAGE."
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(srfi-1:find root-partition? (image-partitions image)))
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(define (root-partition-index image)
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"Return the index of the root partition of the given IMAGE."
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(1+ (srfi-1:list-index root-partition? (image-partitions image))))
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;;
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;; Disk image.
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;;
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(define* (system-disk-image image
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#:key
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(name "disk-image")
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bootcfg
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bootloader
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register-closures?
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(inputs '()))
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"Return as a file-like object, the disk-image described by IMAGE. Said
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image can be copied on a USB stick as is. BOOTLOADER is the bootloader that
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will be installed and configured according to BOOTCFG parameter.
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Raw images of the IMAGE partitions are first created. Then, genimage is used
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to assemble the partition images into a disk-image without resorting to a
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virtual machine.
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INPUTS is a list of inputs (as for packages). When REGISTER-CLOSURES? is
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true, register INPUTS in the store database of the image so that Guix can be
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used in the image."
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(define genimage-name "image")
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(define (image->genimage-cfg image)
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;; Return as a file-like object, the genimage configuration file
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;; describing the given IMAGE.
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(define (format->image-type format)
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;; Return the genimage format corresponding to FORMAT. For now, only
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;; the hdimage format (raw disk-image) is supported.
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(cond
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((memq format '(disk-image compressed-qcow2)) "hdimage")
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(else
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(raise (condition
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(&message
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(message
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(format #f (G_ "Unsupported image type ~a~%.") format))))))))
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(define (partition->dos-type partition)
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;; Return the MBR partition type corresponding to the given PARTITION.
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;; See: https://en.wikipedia.org/wiki/Partition_type.
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(let ((flags (partition-flags partition)))
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(cond
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((member 'esp flags) "0xEF")
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(else "0x83"))))
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(define (partition-image partition)
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;; Return as a file-like object, an image of the given PARTITION. A
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;; directory, filled by calling the PARTITION initializer procedure, is
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;; first created within the store. Then, an image of this directory is
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;; created using tools such as 'mke2fs' or 'mkdosfs', depending on the
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;; partition file-system type.
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(let* ((os (image-operating-system image))
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(schema (local-file (search-path %load-path
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"guix/store/schema.sql")))
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(graph (match inputs
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(((names . _) ...)
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names)))
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(type (partition-file-system partition))
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(image-builder
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(with-imported-modules*
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(let ((initializer #$(partition-initializer partition))
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(inputs '#+(list e2fsprogs fakeroot dosfstools mtools))
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(image-root "tmp-root"))
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(sql-schema #$schema)
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(set-path-environment-variable "PATH" '("bin" "sbin") inputs)
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;; Allow non-ASCII file names--e.g., 'nss-certs'--to be
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;; decoded.
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(setenv "GUIX_LOCPATH"
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#+(file-append glibc-utf8-locales "/lib/locale"))
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(setlocale LC_ALL "en_US.utf8")
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(initializer image-root
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#:references-graphs '#$graph
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#:deduplicate? #f
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#:system-directory #$os
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#:grub-efi #+grub-efi
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#:bootloader-package
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#+(bootloader-package bootloader)
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#:bootloader-installer
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#+(bootloader-installer bootloader)
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#:bootcfg #$bootcfg
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#:bootcfg-location
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#$(bootloader-configuration-file bootloader))
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(make-partition-image #$(partition->gexp partition)
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#$output
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image-root)))))
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(computed-file "partition.img" image-builder
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;; Allow offloading so that this I/O-intensive process
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;; doesn't run on the build farm's head node.
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#:local-build? #f
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#:options `(#:references-graphs ,inputs))))
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(define (partition->config partition)
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;; Return the genimage partition configuration for PARTITION.
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(let ((label (partition-label partition))
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(dos-type (partition->dos-type partition))
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(image (partition-image partition))
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(offset (partition-offset partition)))
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#~(format #f "~/partition ~a {
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~/~/partition-type = ~a
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~/~/image = \"~a\"
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~/~/offset = \"~a\"
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~/}"
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#$label
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#$dos-type
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#$image
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#$offset)))
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(let* ((format (image-format image))
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(image-type (format->image-type format))
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(partitions (image-partitions image))
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(partitions-config (map partition->config partitions))
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(builder
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#~(begin
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(let ((format (@ (ice-9 format) format)))
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(call-with-output-file #$output
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(lambda (port)
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(format port
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"\
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image ~a {
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~/~a {}
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~{~a~^~%~}
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}~%" #$genimage-name #$image-type (list #$@partitions-config))))))))
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(computed-file "genimage.cfg" builder)))
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(let* ((image-name (image-name image))
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(name (if image-name
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(symbol->string image-name)
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name))
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(format (image-format image))
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(substitutable? (image-substitutable? image))
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(builder
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(with-imported-modules*
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(let ((inputs '#+(list genimage coreutils findutils qemu-minimal))
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(bootloader-installer
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#+(bootloader-disk-image-installer bootloader))
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(out-image (string-append "images/" #$genimage-name)))
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(set-path-environment-variable "PATH" '("bin" "sbin") inputs)
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(genimage #$(image->genimage-cfg image))
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;; Install the bootloader directly on the disk-image.
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(when bootloader-installer
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(bootloader-installer
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#+(bootloader-package bootloader)
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#$(root-partition-index image)
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out-image))
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(convert-disk-image out-image '#$format #$output)))))
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(computed-file name builder
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#:local-build? #f ;too I/O-intensive
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#:options `(#:substitutable? ,substitutable?))))
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;;
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;; ISO9660 image.
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;;
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(define (has-guix-service-type? os)
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"Return true if OS contains a service of the type GUIX-SERVICE-TYPE."
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(not (not (srfi-1:find (lambda (service)
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(eq? (service-kind service) guix-service-type))
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(operating-system-services os)))))
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(define* (system-iso9660-image image
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#:key
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(name "image.iso")
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bootcfg
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bootloader
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register-closures?
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(inputs '())
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(grub-mkrescue-environment '()))
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"Return as a file-like object a bootable, stand-alone iso9660 image.
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INPUTS is a list of inputs (as for packages). When REGISTER-CLOSURES? is
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true, register INPUTS in the store database of the image so that Guix can be
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used in the image. "
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(define root-label
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(match (image-partitions image)
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((partition)
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(partition-label partition))))
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(define root-uuid
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(match (image-partitions image)
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((partition)
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(uuid-bytevector (partition-uuid partition)))))
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(let* ((os (image-operating-system image))
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(bootloader (bootloader-package bootloader))
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(compression? (image-compression? image))
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(substitutable? (image-substitutable? image))
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(schema (local-file (search-path %load-path
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"guix/store/schema.sql")))
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(graph (match inputs
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(((names . _) ...)
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names)))
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(builder
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(with-imported-modules*
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(let* ((inputs '#$(list parted e2fsprogs dosfstools xorriso
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sed grep coreutils findutils gawk))
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(image-root "tmp-root"))
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(sql-schema #$schema)
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;; Allow non-ASCII file names--e.g., 'nss-certs'--to be decoded.
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(setenv "GUIX_LOCPATH"
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#+(file-append glibc-utf8-locales "/lib/locale"))
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(setlocale LC_ALL "en_US.utf8")
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(set-path-environment-variable "PATH" '("bin" "sbin") inputs)
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(initialize-root-partition image-root
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#:references-graphs '#$graph
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#:deduplicate? #f
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#:system-directory #$os)
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(make-iso9660-image #$xorriso
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'#$grub-mkrescue-environment
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#$bootloader
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#$bootcfg
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#$os
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image-root
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#$output
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#:references-graphs '#$graph
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#:register-closures? #$register-closures?
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#:compression? #$compression?
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#:volume-id #$root-label
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#:volume-uuid #$root-uuid)))))
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(computed-file name builder
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;; Allow offloading so that this I/O-intensive process
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;; doesn't run on the build farm's head node.
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#:local-build? #f
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#:options `(#:references-graphs ,inputs
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#:substitutable? ,substitutable?))))
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(define (image-with-label base-image label)
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"The volume ID of an ISO is the label of the first partition. This procedure
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returns an image record where the first partition's label is set to <label>."
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(image
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(inherit base-image)
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(partitions
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(match (image-partitions base-image)
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((boot others ...)
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(cons
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(partition
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(inherit boot)
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(label label))
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others))))))
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;;
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||
;; Image creation.
|
||
;;
|
||
|
||
(define (image->root-file-system image)
|
||
"Return the IMAGE root partition file-system type."
|
||
(let ((format (image-format image)))
|
||
(if (eq? format 'iso9660)
|
||
"iso9660"
|
||
(partition-file-system (find-root-partition image)))))
|
||
|
||
(define (root-size image)
|
||
"Return the root partition size of IMAGE."
|
||
(let* ((image-size (image-size image))
|
||
(root-partition (find-root-partition image))
|
||
(root-size (partition-size root-partition)))
|
||
(cond
|
||
((and (eq? root-size 'guess) image-size)
|
||
image-size)
|
||
(else root-size))))
|
||
|
||
(define* (image-with-os* base-image os)
|
||
"Return an image based on BASE-IMAGE but with the operating-system field set
|
||
to OS. Also set the UUID and the size of the root partition."
|
||
(define root-file-system
|
||
(srfi-1:find
|
||
(lambda (fs)
|
||
(string=? (file-system-mount-point fs) "/"))
|
||
(operating-system-file-systems os)))
|
||
|
||
(image
|
||
(inherit base-image)
|
||
(operating-system os)
|
||
(partitions
|
||
(map (lambda (p)
|
||
(if (root-partition? p)
|
||
(partition
|
||
(inherit p)
|
||
(uuid (file-system-device root-file-system))
|
||
(size (root-size base-image)))
|
||
p))
|
||
(image-partitions base-image)))))
|
||
|
||
(define (operating-system-for-image image)
|
||
"Return an operating-system based on the one specified in IMAGE, but
|
||
suitable for image creation. Assign an UUID to the root file-system, so that
|
||
it can be used for bootloading."
|
||
(define volatile-root? (if (eq? (image-format image) 'iso9660)
|
||
#t
|
||
(image-volatile-root? image)))
|
||
|
||
(define (root-uuid os)
|
||
;; UUID of the root file system, computed in a deterministic fashion.
|
||
;; This is what we use to locate the root file system so it has to be
|
||
;; different from the user's own file system UUIDs.
|
||
(let ((type (if (eq? (image-format image) 'iso9660)
|
||
'iso9660
|
||
'dce)))
|
||
(operating-system-uuid os type)))
|
||
|
||
(let* ((root-file-system-type (image->root-file-system image))
|
||
(base-os (image-operating-system image))
|
||
(file-systems-to-keep
|
||
(srfi-1:remove
|
||
(lambda (fs)
|
||
(let ((mount-point (file-system-mount-point fs)))
|
||
(or (string=? mount-point "/")
|
||
(string=? mount-point "/boot/efi"))))
|
||
(operating-system-file-systems base-os)))
|
||
(format (image-format image))
|
||
(os
|
||
(operating-system
|
||
(inherit base-os)
|
||
(initrd (lambda (file-systems . rest)
|
||
(apply (operating-system-initrd base-os)
|
||
file-systems
|
||
#:volatile-root? volatile-root?
|
||
rest)))
|
||
(bootloader (if (eq? format 'iso9660)
|
||
(bootloader-configuration
|
||
(inherit
|
||
(operating-system-bootloader base-os))
|
||
(bootloader grub-mkrescue-bootloader))
|
||
(operating-system-bootloader base-os)))
|
||
(file-systems (cons (file-system
|
||
(mount-point "/")
|
||
(device "/dev/placeholder")
|
||
(type root-file-system-type))
|
||
file-systems-to-keep))))
|
||
(uuid (root-uuid os)))
|
||
(operating-system
|
||
(inherit os)
|
||
(file-systems (cons (file-system
|
||
(mount-point "/")
|
||
(device uuid)
|
||
(type root-file-system-type))
|
||
file-systems-to-keep)))))
|
||
|
||
(define* (system-image image)
|
||
"Return the derivation of IMAGE. It can be a raw disk-image or an ISO9660
|
||
image, depending on IMAGE format."
|
||
(define substitutable? (image-substitutable? image))
|
||
(define target (image-target image))
|
||
|
||
(with-parameters ((%current-target-system target))
|
||
(let* ((os (operating-system-for-image image))
|
||
(image* (image-with-os* image os))
|
||
(image-format (image-format image))
|
||
(register-closures? (has-guix-service-type? os))
|
||
(bootcfg (operating-system-bootcfg os))
|
||
(bootloader (bootloader-configuration-bootloader
|
||
(operating-system-bootloader os))))
|
||
(cond
|
||
((memq image-format '(disk-image compressed-qcow2))
|
||
(system-disk-image image*
|
||
#:bootcfg bootcfg
|
||
#:bootloader bootloader
|
||
#:register-closures? register-closures?
|
||
#:inputs `(("system" ,os)
|
||
("bootcfg" ,bootcfg))))
|
||
((memq image-format '(iso9660))
|
||
(system-iso9660-image
|
||
image*
|
||
#:bootcfg bootcfg
|
||
#:bootloader bootloader
|
||
#:register-closures? register-closures?
|
||
#:inputs `(("system" ,os)
|
||
("bootcfg" ,bootcfg))
|
||
;; Make sure to use a mode that does no imply
|
||
;; HFS+ tree creation that may fail with:
|
||
;;
|
||
;; "libisofs: FAILURE : Too much files to mangle,
|
||
;; cannot guarantee unique file names"
|
||
;;
|
||
;; This happens if some limits are exceeded, see:
|
||
;; https://lists.gnu.org/archive/html/grub-devel/2020-06/msg00048.html
|
||
#:grub-mkrescue-environment
|
||
'(("MKRESCUE_SED_MODE" . "mbr_only"))))))))
|
||
|
||
|
||
;;
|
||
;; Image detection.
|
||
;;
|
||
|
||
(define (image-modules)
|
||
"Return the list of image modules."
|
||
(cons (resolve-interface '(gnu system image))
|
||
(all-modules (map (lambda (entry)
|
||
`(,entry . "gnu/system/images/"))
|
||
%load-path)
|
||
#:warn warn-about-load-error)))
|
||
|
||
(define %image-types
|
||
;; The list of publically-known image types.
|
||
(delay (fold-module-public-variables (lambda (obj result)
|
||
(if (image-type? obj)
|
||
(cons obj result)
|
||
result))
|
||
'()
|
||
(image-modules))))
|
||
|
||
(define (lookup-image-type-by-name name)
|
||
"Return the image type called NAME."
|
||
(or (srfi-1:find (lambda (image-type)
|
||
(eq? name (image-type-name image-type)))
|
||
(force %image-types))
|
||
(raise
|
||
(formatted-message (G_ "~a: no such image type") name))))
|
||
|
||
;;; image.scm ends here
|