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-rw-r--r--Makefile.am3
-rw-r--r--gnu/system/vm.scm263
2 files changed, 265 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am
index f81516c227..7a1b6ad163 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -160,7 +160,8 @@ MODULES = \
gnu/packages/which.scm \
gnu/packages/xml.scm \
gnu/packages/zile.scm \
- gnu/packages/zip.scm
+ gnu/packages/zip.scm \
+ gnu/system/vm.scm
GOBJECTS = $(MODULES:%.scm=%.go) guix/config.go
diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
new file mode 100644
index 0000000000..3dae35d776
--- /dev/null
+++ b/gnu/system/vm.scm
@@ -0,0 +1,263 @@
+;;; 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 store)
+ #:use-module (guix derivations)
+ #:use-module (guix packages)
+ #:use-module ((gnu packages base) #:select (%final-inputs guile-final))
+ #:use-module (gnu packages qemu)
+ #:use-module (gnu packages parted)
+ #:use-module (gnu packages grub)
+ #:use-module (gnu packages linux)
+ #:use-module (gnu packages linux-initrd)
+ #:use-module ((gnu packages make-bootstrap)
+ #:select (%guile-static-stripped))
+ #:use-module (srfi srfi-26)
+ #:use-module (ice-9 match)
+ #:export (expression->derivation-in-linux-vm
+ qemu-image))
+
+
+;;; Commentary:
+;;;
+;;; Tools to evaluate build expressions within virtual machines.
+;;;
+;;; Code:
+
+(define* (expression->derivation-in-linux-vm store name system exp inputs
+ #:key
+ (linux linux-libre)
+ (initrd qemu-initrd)
+ (qemu qemu-kvm/smb-shares)
+ (env-vars '())
+ (modules '())
+ (guile-for-build
+ (%guile-for-build))
+
+ (make-disk-image? #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."
+ (define input-alist
+ (map (match-lambda
+ ((input package)
+ `(,input . ,(package-output store package "out" system)))
+ ((input package sub-drv)
+ `(,input . ,(package-output store package sub-drv system))))
+ inputs))
+
+ (define exp*
+ ;; EXP, but with INPUTS available.
+ `(let ((%build-inputs ',input-alist))
+ ,exp))
+
+ (define builder
+ ;; Code that launches the VM that evaluates EXP.
+ `(begin
+ (use-modules (guix build utils))
+
+ (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" "image.qcow2"
+ ,(number->string disk-image-size)))
+ '(begin))
+
+ (mkdir "xchg")
+ (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)))))))
+
+ (let ((user-builder (add-text-to-store store "builder-in-linux-vm"
+ (object->string exp*)
+ '()))
+ (->drv (cut package-derivation store <> system))
+ (coreutils (car (assoc-ref %final-inputs "coreutils"))))
+ (build-expression->derivation store name system builder
+ `(("qemu" ,(->drv qemu))
+ ("linux" ,(->drv linux))
+ ("initrd" ,(->drv initrd))
+ ("coreutils" ,(->drv coreutils))
+ ("builder" ,user-builder)
+ ,@(map (match-lambda
+ ((name package sub-drv ...)
+ `(,name ,(->drv package)
+ ,@sub-drv)))
+ inputs))
+ #:env-vars env-vars
+ #:modules `((guix build utils)
+ ,@modules)
+ #:guile-for-build guile-for-build)))
+
+(define* (qemu-image store #:key
+ (name "qemu-image")
+ (system (%current-system))
+ (disk-image-size (* 100 (expt 2 20)))
+ (linux linux-libre)
+ (initrd qemu-initrd)
+ (inputs '()))
+ "Return a bootable, stand-alone QEMU image."
+ (expression->derivation-in-linux-vm
+ store "qemu-image" system
+ `(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
+ (initrd (string-append (assoc-ref %build-inputs "initrd")
+ "/initrd"))
+ (linux (string-append (assoc-ref %build-inputs "linux")
+ "/bzImage"))
+ (makedev (lambda (major minor)
+ (+ (* major 256) minor))))
+
+ ;; 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")
+ (mknod "/dev/vda" 'block-special #o644 (makedev 8 0))
+ (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")
+ (mknod "/dev/vda1" 'block-special #o644 (makedev 8 1))
+ (and (zero? (system* mkfs "-F" "/dev/vda1"))
+ (begin
+ (display "mounting partition...\n")
+ (mkdir "/fs")
+ (mount "/dev/vda1" "/fs" "ext3")
+ (mkdir "/fs/boot")
+ (mkdir "/fs/boot/grub")
+ (copy-file linux "/fs/boot/bzImage")
+ (copy-file initrd "/fs/boot/initrd")
+ (call-with-output-file "/fs/boot/grub/grub.cfg"
+ (lambda (p)
+ (display "
+set timeout=10
+search.file /boot/bzImage
+
+menuentry \"Boot-to-Guile! Happy Birthday Guile 2.0! (Guile, Guix & co.)\" {
+ linux /boot/bzImage --repl
+ initrd /boot/initrd
+}" p)))
+ (and (zero?
+ (system* grub "--no-floppy"
+ "--boot-directory" "/fs/boot"
+ "/dev/vda"))
+ (zero?
+ (system* umount "/fs"))))))))
+ `(("parted" ,parted)
+ ("grub" ,grub)
+ ("e2fsprogs" ,e2fsprogs)
+ ("linux" ,linux-libre)
+ ("initrd" ,qemu-initrd)
+
+ ;; 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))
+ #:make-disk-image? #t
+ #:disk-image-size disk-image-size))
+
+
+;;;
+;;; Guile 2.0 potluck examples.
+;;;
+
+(define (example1)
+ (let ((store #f))
+ (dynamic-wind
+ (lambda ()
+ (set! store (open-connection)))
+ (lambda ()
+ (parameterize ((%guile-for-build (package-derivation store guile-final)))
+ (expression->derivation-in-linux-vm
+ store "vm-test" (%current-system)
+ '(begin
+ (display "hello from boot!\n")
+ (call-with-output-file "/xchg/hello"
+ (lambda (p)
+ (display "world" p))))
+ '())))
+ (lambda ()
+ (close-connection store)))))
+
+(define (example2)
+ (let ((store #f))
+ (dynamic-wind
+ (lambda ()
+ (set! store (open-connection)))
+ (lambda ()
+ (parameterize ((%guile-for-build (package-derivation store guile-final)))
+ (qemu-image store #:disk-image-size (* 30 (expt 2 20)))))
+ (lambda ()
+ (close-connection store)))))
+
+;;; vm.scm ends here
generated by cgit v1.2.3 (git 2.45.0) at 2024-11-18 17:34:58 +0000