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Diffstat (limited to 'gnu/system')
| -rw-r--r-- | gnu/system/vm.scm | 263 |
1 files changed, 263 insertions, 0 deletions
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 |