474 lines
21 KiB
Scheme
474 lines
21 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
|
||
;;;
|
||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||
;;; under the terms of the GNU General Public License as published by
|
||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||
;;; your option) any later version.
|
||
;;;
|
||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;; GNU General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (gnu system vm)
|
||
#:use-module (guix config)
|
||
#:use-module (guix store)
|
||
#:use-module (guix derivations)
|
||
#:use-module (guix packages)
|
||
#:use-module (guix monads)
|
||
#:use-module ((gnu packages base)
|
||
#:select (%final-inputs
|
||
guile-final gcc-final glibc-final
|
||
ld-wrapper binutils-final
|
||
coreutils findutils grep sed tzdata))
|
||
#:use-module (gnu packages guile)
|
||
#:use-module (gnu packages bash)
|
||
#:use-module (gnu packages less)
|
||
#:use-module (gnu packages qemu)
|
||
#:use-module (gnu packages parted)
|
||
#:use-module (gnu packages zile)
|
||
#:use-module (gnu packages grub)
|
||
#:use-module (gnu packages linux)
|
||
#:use-module (gnu packages linux-initrd)
|
||
#:use-module (gnu packages package-management)
|
||
#:use-module ((gnu packages make-bootstrap)
|
||
#:select (%guile-static-stripped))
|
||
#:use-module (gnu packages system)
|
||
|
||
#:use-module (gnu system shadow)
|
||
#:use-module (gnu system linux)
|
||
#:use-module (gnu system grub)
|
||
#:use-module (gnu system dmd)
|
||
#:use-module (gnu system)
|
||
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (ice-9 match)
|
||
|
||
#:export (expression->derivation-in-linux-vm
|
||
qemu-image
|
||
system-qemu-image))
|
||
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; Tools to evaluate build expressions within virtual machines.
|
||
;;;
|
||
;;; Code:
|
||
|
||
(define* (expression->derivation-in-linux-vm name exp
|
||
#:key
|
||
(system (%current-system))
|
||
(inputs '())
|
||
(linux linux-libre)
|
||
(initrd qemu-initrd)
|
||
(qemu qemu/smb-shares)
|
||
(env-vars '())
|
||
(modules '())
|
||
(guile-for-build
|
||
(%guile-for-build))
|
||
|
||
(make-disk-image? #f)
|
||
(references-graphs #f)
|
||
(disk-image-size
|
||
(* 100 (expt 2 20))))
|
||
"Evaluate EXP in a QEMU virtual machine running LINUX with INITRD. In the
|
||
virtual machine, EXP has access to all of INPUTS from the store; it should put
|
||
its output files in the `/xchg' directory, which is copied to the derivation's
|
||
output when the VM terminates.
|
||
|
||
When MAKE-DISK-IMAGE? is true, then create a QEMU disk image of
|
||
DISK-IMAGE-SIZE bytes and return it.
|
||
|
||
When REFERENCES-GRAPHS is true, it must be a list of file name/store path
|
||
pairs, as for `derivation'. The files containing the reference graphs are
|
||
made available under the /xchg CIFS share."
|
||
;; FIXME: Allow use of macros from other modules, as done in
|
||
;; `build-expression->derivation'.
|
||
|
||
(define input-alist
|
||
(with-monad %store-monad
|
||
(map (match-lambda
|
||
((input (? package? package))
|
||
(mlet %store-monad ((out (package-file package #:system system)))
|
||
(return `(,input . ,out))))
|
||
((input (? package? package) sub-drv)
|
||
(mlet %store-monad ((out (package-file package
|
||
#:output sub-drv
|
||
#:system system)))
|
||
(return `(,input . ,out))))
|
||
((input (? derivation? drv))
|
||
(return `(,input . ,(derivation->output-path drv))))
|
||
((input (? derivation? drv) sub-drv)
|
||
(return `(,input . ,(derivation->output-path drv sub-drv))))
|
||
((input (and (? string?) (? store-path?) file))
|
||
(return `(,input . ,file))))
|
||
inputs)))
|
||
|
||
(define builder
|
||
;; Code that launches the VM that evaluates EXP.
|
||
`(let ()
|
||
(use-modules (guix build utils)
|
||
(srfi srfi-1)
|
||
(ice-9 rdelim))
|
||
|
||
(let ((out (assoc-ref %outputs "out"))
|
||
(cu (string-append (assoc-ref %build-inputs "coreutils")
|
||
"/bin"))
|
||
(qemu (string-append (assoc-ref %build-inputs "qemu")
|
||
"/bin/qemu-system-"
|
||
(car (string-split ,system #\-))))
|
||
(img (string-append (assoc-ref %build-inputs "qemu")
|
||
"/bin/qemu-img"))
|
||
(linux (string-append (assoc-ref %build-inputs "linux")
|
||
"/bzImage"))
|
||
(initrd (string-append (assoc-ref %build-inputs "initrd")
|
||
"/initrd"))
|
||
(builder (assoc-ref %build-inputs "builder")))
|
||
|
||
;; XXX: QEMU uses "rm -rf" when it's done to remove the temporary SMB
|
||
;; directory, so it really needs `rm' in $PATH.
|
||
(setenv "PATH" cu)
|
||
|
||
,(if make-disk-image?
|
||
`(zero? (system* img "create" "-f" "qcow2" "image.qcow2"
|
||
,(number->string disk-image-size)))
|
||
'(begin))
|
||
|
||
(mkdir "xchg")
|
||
|
||
;; Copy the reference-graph files under xchg/ so EXP can access it.
|
||
(begin
|
||
,@(match references-graphs
|
||
(((graph-files . _) ...)
|
||
(map (lambda (file)
|
||
`(copy-file ,file
|
||
,(string-append "xchg/" file)))
|
||
graph-files))
|
||
(#f '())))
|
||
|
||
(and (zero?
|
||
(system* qemu "-nographic" "-no-reboot"
|
||
"-net" "nic,model=e1000"
|
||
"-net" (string-append "user,smb=" (getcwd))
|
||
"-kernel" linux
|
||
"-initrd" initrd
|
||
"-append" (string-append "console=ttyS0 --load="
|
||
builder)
|
||
,@(if make-disk-image?
|
||
'("-hda" "image.qcow2")
|
||
'())))
|
||
,(if make-disk-image?
|
||
'(copy-file "image.qcow2" ; XXX: who mkdir'd OUT?
|
||
out)
|
||
'(begin
|
||
(mkdir out)
|
||
(copy-recursively "xchg" out)))))))
|
||
|
||
(mlet* %store-monad
|
||
((input-alist (sequence %store-monad input-alist))
|
||
(exp* -> `(let ((%build-inputs ',input-alist))
|
||
,exp))
|
||
(user-builder (text-file "builder-in-linux-vm"
|
||
(object->string exp*)))
|
||
(coreutils -> (car (assoc-ref %final-inputs "coreutils")))
|
||
(inputs (lower-inputs `(("qemu" ,qemu)
|
||
("linux" ,linux)
|
||
("initrd" ,initrd)
|
||
("coreutils" ,coreutils)
|
||
("builder" ,user-builder)
|
||
,@inputs))))
|
||
(derivation-expression name builder
|
||
#:system system
|
||
#:inputs inputs
|
||
#:env-vars env-vars
|
||
#:modules (delete-duplicates
|
||
`((guix build utils)
|
||
,@modules))
|
||
#:guile-for-build guile-for-build
|
||
#:references-graphs references-graphs)))
|
||
|
||
(define* (qemu-image #:key
|
||
(name "qemu-image")
|
||
(system (%current-system))
|
||
(disk-image-size (* 100 (expt 2 20)))
|
||
grub-configuration
|
||
(initialize-store? #f)
|
||
(populate #f)
|
||
(inputs '())
|
||
(inputs-to-copy '()))
|
||
"Return a bootable, stand-alone QEMU image. The returned image is a full
|
||
disk image, with a GRUB installation that uses GRUB-CONFIGURATION as its
|
||
configuration file (GRUB-CONFIGURATION must be the name of a file in the VM.)
|
||
|
||
INPUTS-TO-COPY is a list of inputs (as for packages) whose closure is copied
|
||
into the image being built. When INITIALIZE-STORE? is true, initialize the
|
||
store database in the image so that Guix can be used in the image.
|
||
|
||
POPULATE is a list of directives stating directories or symlinks to be created
|
||
in the disk image partition. It is evaluated once the image has been
|
||
populated with INPUTS-TO-COPY. It can be used to provide additional files,
|
||
such as /etc files."
|
||
(define (input->name+derivation tuple)
|
||
(with-monad %store-monad
|
||
(match tuple
|
||
((name (? package? package))
|
||
(mlet %store-monad ((drv (package->derivation package system)))
|
||
(return `(,name . ,(derivation->output-path drv)))))
|
||
((name (? package? package) sub-drv)
|
||
(mlet %store-monad ((drv (package->derivation package system)))
|
||
(return `(,name . ,(derivation->output-path drv sub-drv)))))
|
||
((name (? derivation? drv))
|
||
(return `(,name . ,(derivation->output-path drv))))
|
||
((name (? derivation? drv) sub-drv)
|
||
(return `(,name . ,(derivation->output-path drv sub-drv))))
|
||
((input (and (? string?) (? store-path?) file))
|
||
(return `(,input . ,file))))))
|
||
|
||
(mlet %store-monad
|
||
((graph (sequence %store-monad
|
||
(map input->name+derivation inputs-to-copy))))
|
||
(expression->derivation-in-linux-vm
|
||
"qemu-image"
|
||
`(let ()
|
||
(use-modules (ice-9 rdelim)
|
||
(srfi srfi-1)
|
||
(guix build utils)
|
||
(guix build linux-initrd))
|
||
|
||
(let ((parted (string-append (assoc-ref %build-inputs "parted")
|
||
"/sbin/parted"))
|
||
(mkfs (string-append (assoc-ref %build-inputs "e2fsprogs")
|
||
"/sbin/mkfs.ext3"))
|
||
(grub (string-append (assoc-ref %build-inputs "grub")
|
||
"/sbin/grub-install"))
|
||
(umount (string-append (assoc-ref %build-inputs "util-linux")
|
||
"/bin/umount")) ; XXX: add to Guile
|
||
(grub.cfg ,grub-configuration))
|
||
|
||
(define (read-reference-graph port)
|
||
;; Return a list of store paths from the reference graph at PORT.
|
||
;; The data at PORT is the format produced by #:references-graphs.
|
||
(let loop ((line (read-line port))
|
||
(result '()))
|
||
(cond ((eof-object? line)
|
||
(delete-duplicates result))
|
||
((string-prefix? "/" line)
|
||
(loop (read-line port)
|
||
(cons line result)))
|
||
(else
|
||
(loop (read-line port)
|
||
result)))))
|
||
|
||
(define (things-to-copy)
|
||
;; Return the list of store files to copy to the image.
|
||
(define (graph-from-file file)
|
||
(call-with-input-file file
|
||
read-reference-graph))
|
||
|
||
,(match inputs-to-copy
|
||
(((graph-files . _) ...)
|
||
`(let* ((graph-files ',(map (cut string-append "/xchg/" <>)
|
||
graph-files))
|
||
(paths (append-map graph-from-file graph-files)))
|
||
(delete-duplicates paths)))
|
||
(#f ''())))
|
||
|
||
;; GRUB is full of shell scripts.
|
||
(setenv "PATH"
|
||
(string-append (dirname grub) ":"
|
||
(assoc-ref %build-inputs "coreutils") "/bin:"
|
||
(assoc-ref %build-inputs "findutils") "/bin:"
|
||
(assoc-ref %build-inputs "sed") "/bin:"
|
||
(assoc-ref %build-inputs "grep") "/bin:"
|
||
(assoc-ref %build-inputs "gawk") "/bin"))
|
||
|
||
(display "creating partition table...\n")
|
||
(and (zero? (system* parted "/dev/vda" "mklabel" "msdos"
|
||
"mkpart" "primary" "ext2" "1MiB"
|
||
,(format #f "~aB"
|
||
(- disk-image-size
|
||
(* 5 (expt 2 20))))))
|
||
(begin
|
||
(display "creating ext3 partition...\n")
|
||
(and (zero? (system* mkfs "-F" "/dev/vda1"))
|
||
(let ((store (string-append "/fs" ,%store-directory)))
|
||
(display "mounting partition...\n")
|
||
(mkdir "/fs")
|
||
(mount "/dev/vda1" "/fs" "ext3")
|
||
(mkdir-p "/fs/boot/grub")
|
||
(symlink grub.cfg "/fs/boot/grub/grub.cfg")
|
||
|
||
;; Populate the image's store.
|
||
(mkdir-p store)
|
||
(chmod store #o1775)
|
||
(for-each (lambda (thing)
|
||
(copy-recursively thing
|
||
(string-append "/fs"
|
||
thing)))
|
||
(things-to-copy))
|
||
|
||
;; Populate /dev.
|
||
(make-essential-device-nodes #:root "/fs")
|
||
|
||
;; Optionally, register the inputs in the image's store.
|
||
(let* ((guix (assoc-ref %build-inputs "guix"))
|
||
(register (string-append guix
|
||
"/sbin/guix-register")))
|
||
,@(if initialize-store?
|
||
(match inputs-to-copy
|
||
(((graph-files . _) ...)
|
||
(map (lambda (closure)
|
||
`(system* register "--prefix" "/fs"
|
||
,(string-append "/xchg/"
|
||
closure)))
|
||
graph-files)))
|
||
'(#f)))
|
||
|
||
;; Evaluate the POPULATE directives.
|
||
,@(let loop ((directives populate)
|
||
(statements '()))
|
||
(match directives
|
||
(()
|
||
(reverse statements))
|
||
((('directory name) rest ...)
|
||
(loop rest
|
||
(cons `(mkdir-p ,(string-append "/fs" name))
|
||
statements)))
|
||
((('directory name uid gid) rest ...)
|
||
(let ((dir (string-append "/fs" name)))
|
||
(loop rest
|
||
(cons* `(chown ,dir ,uid ,gid)
|
||
`(mkdir-p ,dir)
|
||
statements))))
|
||
(((new '-> old) rest ...)
|
||
(loop rest
|
||
(cons `(symlink ,old
|
||
,(string-append "/fs" new))
|
||
statements)))))
|
||
|
||
(and=> (assoc-ref %build-inputs "populate")
|
||
(lambda (populate)
|
||
(chdir "/fs")
|
||
(primitive-load populate)
|
||
(chdir "/")))
|
||
|
||
(display "clearing file timestamps...\n")
|
||
(for-each (lambda (file)
|
||
(let ((s (lstat file)))
|
||
;; XXX: Guile uses libc's 'utime' function
|
||
;; (not 'futime'), so the timestamp of
|
||
;; symlinks cannot be changed, and there
|
||
;; are symlinks here pointing to
|
||
;; /nix/store, which is the host,
|
||
;; read-only store.
|
||
(unless (eq? (stat:type s) 'symlink)
|
||
(utime file 0 0 0 0))))
|
||
(find-files "/fs" ".*"))
|
||
|
||
(and (zero?
|
||
(system* grub "--no-floppy"
|
||
"--boot-directory" "/fs/boot"
|
||
"/dev/vda"))
|
||
(zero? (system* umount "/fs"))
|
||
(reboot))))))))
|
||
#:system system
|
||
#:inputs `(("parted" ,parted)
|
||
("grub" ,grub)
|
||
("e2fsprogs" ,e2fsprogs)
|
||
|
||
;; For shell scripts.
|
||
("sed" ,(car (assoc-ref %final-inputs "sed")))
|
||
("grep" ,(car (assoc-ref %final-inputs "grep")))
|
||
("coreutils" ,(car (assoc-ref %final-inputs "coreutils")))
|
||
("findutils" ,(car (assoc-ref %final-inputs "findutils")))
|
||
("gawk" ,(car (assoc-ref %final-inputs "gawk")))
|
||
("util-linux" ,util-linux)
|
||
|
||
,@(if initialize-store?
|
||
`(("guix" ,guix))
|
||
'())
|
||
|
||
,@inputs-to-copy)
|
||
#:make-disk-image? #t
|
||
#:disk-image-size disk-image-size
|
||
#:references-graphs graph
|
||
#:modules '((guix build utils)
|
||
(guix build linux-initrd)))))
|
||
|
||
|
||
;;;
|
||
;;; Stand-alone VM image.
|
||
;;;
|
||
|
||
(define %demo-operating-system
|
||
(operating-system
|
||
(host-name "gnu")
|
||
(timezone "Europe/Paris")
|
||
(locale "en_US.UTF-8")
|
||
(users (list (user-account
|
||
(name "guest")
|
||
(password "")
|
||
(uid 1000) (gid 100)
|
||
(comment "Guest of GNU")
|
||
(home-directory "/home/guest"))))
|
||
(packages (list coreutils
|
||
bash
|
||
guile-2.0
|
||
dmd
|
||
gcc-final
|
||
ld-wrapper ; must come before BINUTILS
|
||
binutils-final
|
||
glibc-final
|
||
inetutils
|
||
findutils
|
||
grep
|
||
sed
|
||
procps
|
||
psmisc
|
||
zile
|
||
less
|
||
tzdata
|
||
guix))))
|
||
|
||
(define* (system-qemu-image #:optional (os %demo-operating-system)
|
||
#:key (disk-image-size (* 900 (expt 2 20))))
|
||
"Return the derivation of a QEMU image of DISK-IMAGE-SIZE bytes of the GNU
|
||
system as described by OS."
|
||
(mlet* %store-monad
|
||
((os-drv (operating-system-derivation os))
|
||
(os-dir -> (derivation->output-path os-drv))
|
||
(grub.cfg -> (string-append os-dir "/grub.cfg"))
|
||
(build-user-gid (anym %store-monad ; XXX
|
||
(lambda (service)
|
||
(and (equal? '(guix-daemon)
|
||
(service-provision service))
|
||
(match (service-user-groups service)
|
||
((group)
|
||
(user-group-id group)))))
|
||
(operating-system-services os)))
|
||
(populate -> `((directory "/nix/store" 0 ,build-user-gid)
|
||
(directory "/etc")
|
||
(directory "/var/log") ; for dmd
|
||
(directory "/var/run/nscd")
|
||
(directory "/var/nix/gcroots")
|
||
("/var/nix/gcroots/system" -> ,os-dir)
|
||
(directory "/tmp")
|
||
(directory "/var/nix/profiles/per-user/root" 0 0)
|
||
(directory "/var/nix/profiles/per-user/guest"
|
||
1000 100)
|
||
(directory "/home/guest" 1000 100))))
|
||
(qemu-image #:grub-configuration grub.cfg
|
||
#:populate populate
|
||
#:disk-image-size disk-image-size
|
||
#:initialize-store? #t
|
||
#:inputs-to-copy `(("system" ,os-drv)))))
|
||
|
||
;;; vm.scm ends here
|