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author | Ludovic Courtès <ludo@gnu.org> | 2014-04-11 13:38:11 +0200 |
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committer | Ludovic Courtès <ludo@gnu.org> | 2014-04-11 19:08:24 +0200 |
commit | e1a87b904a7f889bf080085c2aaef035b55d111a (patch) | |
tree | fa60a434633427991b4a53213adc885e6f27ad8c /guix/build/vm.scm | |
parent | 772d63658e4a90eb85bc07ceb9a5dd518baab270 (diff) | |
download | guix-patches-e1a87b904a7f889bf080085c2aaef035b55d111a.tar guix-patches-e1a87b904a7f889bf080085c2aaef035b55d111a.tar.gz |
vm: Add (guix build vm) module.
* guix/build/vm.scm: New file.
* Makefile.am (MODULES): Add it.
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Use it.
Diffstat (limited to 'guix/build/vm.scm')
-rw-r--r-- | guix/build/vm.scm | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/guix/build/vm.scm b/guix/build/vm.scm new file mode 100644 index 0000000000..725ede4e1f --- /dev/null +++ b/guix/build/vm.scm @@ -0,0 +1,97 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2013, 2014 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 (guix build vm) + #:use-module (ice-9 match) + #:use-module (guix build utils) + #:export (load-in-linux-vm)) + +;;; Commentary: +;;; +;;; This module provides supporting code to run virtual machines and build +;;; virtual machine images using QEMU. +;;; +;;; Code: + +(define (qemu-command) + "Return the default name of the QEMU command for the current host." + (string-append "qemu-system-" + (substring %host-type 0 + (string-index %host-type #\-)))) + + +(define* (load-in-linux-vm builder + #:key + output + (qemu (qemu-command)) (memory-size 512) + linux initrd + make-disk-image? (disk-image-size 100) + (references-graphs '())) + "Run BUILDER, a Scheme file, into a VM running LINUX with INITRD, and copy +the result to OUTPUT. + +When MAKE-DISK-IMAGE? is true, OUTPUT will contain a VM image of +DISK-IMAGE-SIZE MiB resulting from the execution of BUILDER, which may access +it via /dev/hda. + +REFERENCES-GRAPHS can specify a list of reference-graph files as produced by +the #:references-graphs parameter of 'derivation'." + + (when make-disk-image? + (unless (zero? (system* "qemu-img" "create" "-f" "qcow2" "image.qcow2" + (number->string disk-image-size))) + (error "qemu-img failed"))) + + (mkdir "xchg") + + (match references-graphs + ((graph-files ...) + ;; Copy the reference-graph files under xchg/ so EXP can access it. + (map (lambda (file) + (copy-file file (string-append "xchg/" file))) + graph-files)) + (_ #f)) + + (unless (zero? + (apply system* qemu "-enable-kvm" "-nographic" "-no-reboot" + "-m" (number->string memory-size) + "-net" "nic,model=virtio" + "-virtfs" + (string-append "local,id=store_dev,path=" + (%store-directory) + ",security_model=none,mount_tag=store") + "-virtfs" + (string-append "local,id=xchg_dev,path=xchg" + ",security_model=none,mount_tag=xchg") + "-kernel" linux + "-initrd" initrd + "-append" (string-append "console=ttyS0 --load=" + builder) + (if make-disk-image? + '("-hda" "image.qcow2") + '()))) + (error "qemu failed" qemu)) + + (if make-disk-image? + (copy-file "image.qcow2" ; XXX: who mkdir'd OUTPUT? + output) + (begin + (mkdir output) + (copy-recursively "xchg" output)))) + +;;; vm.scm ends here |