[jackhill/guix/guix.git] / gnu / system / vm.scm

;;; 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 (gnu system vm)
  #:use-module (guix config)
  #:use-module (guix store)
  #:use-module (guix gexp)
  #:use-module (guix derivations)
  #:use-module (guix packages)
  #:use-module (guix monads)
  #:use-module ((gnu packages base)
                #:select (%final-inputs))
  #: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 package-management)
  #:use-module ((gnu packages make-bootstrap)
                #:select (%guile-static-stripped))
  #:use-module (gnu packages admin)

  #:use-module (gnu system shadow)
  #:use-module (gnu system linux)
  #:use-module (gnu system linux-initrd)
  #:use-module (gnu system grub)
  #:use-module (gnu system)
  #:use-module (gnu services)

  #: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
            system-qemu-image/shared-store
            system-qemu-image/shared-store-script))

\f
;;; Commentary:
;;;
;;; Tools to evaluate build expressions within virtual machines.
;;;
;;; Code:

(define* (input->name+output tuple #:key (system (%current-system)))
  "Return as a monadic value a name/file-name pair corresponding to TUPLE, an
input tuple.  The output file name is when building for SYSTEM."
  (with-monad %store-monad
    (match tuple
      ((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))))))

(define %linux-vm-file-systems
  ;; File systems mounted for 'derivation-in-linux-vm'.  The store and /xchg
  ;; directory are shared with the host over 9p.
  (list (file-system
          (mount-point (%store-prefix))
          (device "store")
          (type "9p")
          (needed-for-boot? #t)
          (options "trans=virtio"))
        (file-system
          (mount-point "/xchg")
          (device "xchg")
          (type "9p")
          (needed-for-boot? #t)
          (options "trans=virtio"))))

(define* (expression->derivation-in-linux-vm name exp
                                             #:key
                                             (system (%current-system))
                                             (linux linux-libre)
                                             initrd
                                             (qemu qemu-headless)
                                             (env-vars '())
                                             (modules
                                              '((guix build vm)
                                                (guix build linux-initrd)
                                                (guix build utils)))
                                             (guile-for-build
                                              (%guile-for-build))

                                             (make-disk-image? #f)
                                             (references-graphs #f)
                                             (memory-size 256)
                                             (disk-image-size
                                              (* 100 (expt 2 20))))
  "Evaluate EXP in a QEMU virtual machine running LINUX with INITRD (a
derivation).  In the virtual machine, EXP has access to all its 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.  The virtual machine
runs with MEMORY-SIZE MiB of memory.

When MAKE-DISK-IMAGE? is true, then create a QEMU disk image of
DISK-IMAGE-SIZE bytes and return it.

MODULES is the set of modules imported in the execution environment of EXP.

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."
  (mlet* %store-monad
      ((module-dir   (imported-modules modules))
       (compiled     (compiled-modules modules))
       (user-builder (gexp->file "builder-in-linux-vm" exp))
       (loader       (gexp->file "linux-vm-loader"
                                 #~(begin
                                     (set! %load-path
                                           (cons #$module-dir %load-path))
                                     (set! %load-compiled-path
                                           (cons #$compiled
                                                 %load-compiled-path))
                                     (primitive-load #$user-builder))))
       (coreutils -> (car (assoc-ref %final-inputs "coreutils")))
       (initrd       (if initrd                   ; use the default initrd?
                         (return initrd)
                         (qemu-initrd %linux-vm-file-systems
                                      #:guile-modules-in-chroot? #t))))

    (define builder
      ;; Code that launches the VM that evaluates EXP.
      #~(begin
          (use-modules (guix build utils)
                       (guix build vm))

          (let ((inputs  '#$(list qemu coreutils))
                (linux   (string-append #$linux "/bzImage"))
                (initrd  (string-append #$initrd "/initrd"))
                (loader  #$loader)
                (graphs  '#$(match references-graphs
                              (((graph-files . _) ...) graph-files)
                              (_ #f))))

            (set-path-environment-variable "PATH" '("bin") inputs)

            (load-in-linux-vm loader
                              #:output #$output
                              #:linux linux #:initrd initrd
                              #:memory-size #$memory-size
                              #:make-disk-image? #$make-disk-image?
                              #:disk-image-size #$disk-image-size
                              #:references-graphs graphs))))

    (gexp->derivation name builder
                      ;; TODO: Require the "kvm" feature.
                      #:system system
                      #:env-vars env-vars
                      #:modules `((guix build utils)
                                  (guix build vm)
                                  (guix build linux-initrd))
                      #:guile-for-build guile-for-build
                      #:references-graphs references-graphs)))

(define* (qemu-image #:key
                     (name "qemu-image")
                     (system (%current-system))
                     (qemu qemu-headless)
                     (disk-image-size (* 100 (expt 2 20)))
                     (file-system-type "ext4")
                     grub-configuration
                     (initialize-store? #f)
                     (populate #f)
                     (inputs-to-copy '()))
  "Return a bootable, stand-alone QEMU image, with a root partition of type
FILE-SYSTEM-TYPE.  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."
  (mlet %store-monad
      ((graph (sequence %store-monad
                        (map input->name+output inputs-to-copy))))
   (expression->derivation-in-linux-vm
    name
    #~(begin
        (use-modules (guix build vm)
                     (guix build utils))

        (let ((inputs
               '#$(append (list qemu parted grub e2fsprogs util-linux)
                          (map (compose car (cut assoc-ref %final-inputs <>))
                               '("sed" "grep" "coreutils" "findutils" "gawk"))
                          (if initialize-store? (list guix) '())))

              ;; This variable is unused but allows us to add INPUTS-TO-COPY
              ;; as inputs.
              (to-copy
                '#$(map (match-lambda
                         ((name thing) thing)
                         ((name thing output) `(,thing ,output)))
                        inputs-to-copy)))

          (set-path-environment-variable "PATH" '("bin" "sbin") inputs)

          (let ((graphs '#$(match inputs-to-copy
                             (((names . _) ...)
                              names))))
            (initialize-hard-disk #:grub.cfg #$grub-configuration
                                  #:closures-to-copy graphs
                                  #:disk-image-size #$disk-image-size
                                  #:file-system-type #$file-system-type
                                  #:initialize-store? #$initialize-store?
                                  #:directives '#$populate)
            (reboot))))
    #:system system
    #:make-disk-image? #t
    #:disk-image-size disk-image-size
    #:references-graphs graph)))

\f
;;;
;;; Stand-alone VM image.
;;;

(define (operating-system-build-gid os)
  "Return as a monadic value the group id for build users of OS, or #f."
  (anym %store-monad
        (lambda (service)
          (and (equal? '(guix-daemon)
                       (service-provision service))
               (match (service-user-groups service)
                 ((group)
                  (user-group-id group)))))
        (operating-system-services os)))

(define (operating-system-default-contents os)
  "Return a list of directives suitable for 'system-qemu-image' describing the
basic contents of the root file system of OS."
  (define (user-directories user)
    (let ((home (user-account-home-directory user))
          ;; XXX: Deal with automatically allocated ids.
          (uid  (or (user-account-uid user) 0))
          (gid  (or (user-account-gid user) 0))
          (root (string-append "/var/guix/profiles/per-user/"
                               (user-account-name user))))
      #~((directory #$root #$uid #$gid)
         (directory #$home #$uid #$gid))))

  (mlet* %store-monad ((os-drv    (operating-system-derivation os))
                       (build-gid (operating-system-build-gid os))
                       (profile   (operating-system-profile os)))
    (return #~((directory #$(%store-prefix) 0 #$(or build-gid 0))
               (directory "/etc")
               (directory "/var/log")                     ; for dmd
               (directory "/var/run/nscd")
               (directory "/var/guix/gcroots")
               ("/var/guix/gcroots/system" -> #$os-drv)
               (directory "/run")
               ("/run/current-system" -> #$profile)
               (directory "/bin")
               ("/bin/sh" -> "/run/current-system/bin/bash")
               (directory "/tmp")
               (directory "/var/guix/profiles/per-user/root" 0 0)

               (directory "/root" 0 0)             ; an exception
               #$@(append-map user-directories
                              (operating-system-users os))))))

(define* (system-qemu-image os
                            #:key
                            (file-system-type "ext4")
                            (disk-image-size (* 900 (expt 2 20))))
  "Return the derivation of a freestanding QEMU image of DISK-IMAGE-SIZE bytes
of the GNU system as described by OS."
  (let ((os (operating-system (inherit os)
              ;; The mounted file systems are under our control.
              (file-systems (list (file-system
                                    (mount-point "/")
                                    (device "/dev/sda1")
                                    (type file-system-type)))))))
    (mlet* %store-monad
        ((os-drv      (operating-system-derivation os))
         (os-dir   -> (derivation->output-path os-drv))
         (grub.cfg -> (string-append os-dir "/grub.cfg"))
         (populate    (operating-system-default-contents os)))
      (qemu-image  #:grub-configuration grub.cfg
                   #:populate populate
                   #:disk-image-size disk-image-size
                   #:file-system-type file-system-type
                   #:initialize-store? #t
                   #:inputs-to-copy `(("system" ,os-drv))))))

(define (virtualized-operating-system os)
  "Return an operating system based on OS suitable for use in a virtualized
environment with the store shared with the host."
  (operating-system (inherit os)
    (initrd (cut qemu-initrd <> #:volatile-root? #t))
    (file-systems (list (file-system
                          (mount-point "/")
                          (device "/dev/vda1")
                          (type "ext4"))
                        (file-system
                          (mount-point (%store-prefix))
                          (device "store")
                          (type "9p")
                          (needed-for-boot? #t)
                          (options "trans=virtio"))))))

(define* (system-qemu-image/shared-store
          os
          #:key (disk-image-size (* 15 (expt 2 20))))
  "Return a derivation that builds a QEMU image of OS that shares its store
with the host."
  (mlet* %store-monad
      ((os-drv      (operating-system-derivation os))
       (os-dir   -> (derivation->output-path os-drv))
       (grub.cfg -> (string-append os-dir "/grub.cfg"))
       (populate    (operating-system-default-contents os)))
    ;; TODO: Initialize the database so Guix can be used in the guest.
    (qemu-image #:grub-configuration grub.cfg
                #:populate populate
                #:disk-image-size disk-image-size)))

(define* (system-qemu-image/shared-store-script
          os
          #:key
          (qemu qemu)
          (graphic? #t))
  "Return a derivation that builds a script to run a virtual machine image of
OS that shares its store with the host."
  (mlet* %store-monad
      ((os ->  (virtualized-operating-system os))
       (os-drv (operating-system-derivation os))
       (image  (system-qemu-image/shared-store os)))
    (define builder
      #~(call-with-output-file #$output
          (lambda (port)
            (display
             (string-append "#!" #$bash "/bin/sh
exec " #$qemu "/bin/qemu-system-x86_64 -enable-kvm -no-reboot -net nic,model=virtio \
  -virtfs local,path=" #$(%store-prefix) ",security_model=none,mount_tag=store \
  -net user \
  -kernel " #$(operating-system-kernel os) "/bzImage \
  -initrd " #$os-drv "/initrd \
-append \"" #$(if graphic? "" "console=ttyS0 ")
  "--load=" #$os-drv "/boot --root=/dev/vda1\" \
  -drive file=" #$image
  ",if=virtio,cache=writeback,werror=report,readonly\n")
             port)
            (chmod port #o555))))

    (gexp->derivation "run-vm.sh" builder)))

;;; vm.scm ends here
Commit	Line	Data
04086015	1	;;; GNU Guix --- Functional package management for GNU
735c6dd7	2	;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
04086015 LC	3	;;;
	4	;;; This file is part of GNU Guix.
	5	;;;
	6	;;; GNU Guix is free software; you can redistribute it and/or modify it
	7	;;; under the terms of the GNU General Public License as published by
	8	;;; the Free Software Foundation; either version 3 of the License, or (at
	9	;;; your option) any later version.
	10	;;;
	11	;;; GNU Guix is distributed in the hope that it will be useful, but
	12	;;; WITHOUT ANY WARRANTY; without even the implied warranty of
	13	;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	;;; GNU General Public License for more details.
	15	;;;
	16	;;; You should have received a copy of the GNU General Public License
	17	;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
	18
	19	(define-module (gnu system vm)
93d44bd8	20	#:use-module (guix config)
04086015	21	#:use-module (guix store)
02100028	22	#:use-module (guix gexp)
04086015 LC	23	#:use-module (guix derivations)
04086015 LC	24	#:use-module (guix packages)
d9f0a237	25	#:use-module (guix monads)
9f84f12f	26	#:use-module ((gnu packages base)
7bd9604c	27	#:select (%final-inputs))
1b89a66e LC	28	#:use-module (gnu packages guile)
1b89a66e LC	29	#:use-module (gnu packages bash)
4f62d8d6	30	#:use-module (gnu packages less)
04086015 LC	31	#:use-module (gnu packages qemu)
04086015 LC	32	#:use-module (gnu packages parted)
5b16ff09	33	#:use-module (gnu packages zile)
04086015 LC	34	#:use-module (gnu packages grub)
04086015 LC	35	#:use-module (gnu packages linux)
30f25b03	36	#:use-module (gnu packages package-management)
04086015 LC	37	#:use-module ((gnu packages make-bootstrap)
04086015 LC	38	#:select (%guile-static-stripped))
9de46ffb	39	#:use-module (gnu packages admin)
0ded70f3 LC	40
	41	#:use-module (gnu system shadow)
	42	#:use-module (gnu system linux)
735c6dd7	43	#:use-module (gnu system linux-initrd)
0ded70f3	44	#:use-module (gnu system grub)
033adfe7	45	#:use-module (gnu system)
db4fdc04	46	#:use-module (gnu services)
0ded70f3	47
ca85d7bc	48	#:use-module (srfi srfi-1)
04086015 LC	49	#:use-module (srfi srfi-26)
04086015 LC	50	#:use-module (ice-9 match)
0ded70f3	51
04086015	52	#:export (expression->derivation-in-linux-vm
aedb72fb	53	qemu-image
fd3bfc44 LC	54	system-qemu-image
	55	system-qemu-image/shared-store
	56	system-qemu-image/shared-store-script))
04086015 LC	57
	58	\f
	59	;;; Commentary:
	60	;;;
	61	;;; Tools to evaluate build expressions within virtual machines.
	62	;;;
	63	;;; Code:
	64
ef09fdfb LC	65	(define* (input->name+output tuple #:key (system (%current-system)))
	66	"Return as a monadic value a name/file-name pair corresponding to TUPLE, an
	67	input tuple. The output file name is when building for SYSTEM."
	68	(with-monad %store-monad
	69	(match tuple
	70	((input (? package? package))
	71	(mlet %store-monad ((out (package-file package #:system system)))
	72	(return `(,input . ,out))))
	73	((input (? package? package) sub-drv)
	74	(mlet %store-monad ((out (package-file package
	75	#:output sub-drv
	76	#:system system)))
	77	(return `(,input . ,out))))
	78	((input (? derivation? drv))
	79	(return `(,input . ,(derivation->output-path drv))))
	80	((input (? derivation? drv) sub-drv)
	81	(return `(,input . ,(derivation->output-path drv sub-drv))))
	82	((input (and (? string?) (? store-path?) file))
	83	(return `(,input . ,file))))))
	84
83bcd0b8 LC	85	(define %linux-vm-file-systems
	86	;; File systems mounted for 'derivation-in-linux-vm'. The store and /xchg
	87	;; directory are shared with the host over 9p.
	88	(list (file-system
	89	(mount-point (%store-prefix))
	90	(device "store")
	91	(type "9p")
	92	(needed-for-boot? #t)
	93	(options "trans=virtio"))
	94	(file-system
	95	(mount-point "/xchg")
	96	(device "xchg")
	97	(type "9p")
	98	(needed-for-boot? #t)
	99	(options "trans=virtio"))))
	100
d9f0a237	101	(define* (expression->derivation-in-linux-vm name exp
04086015	102	#:key
2455085a	103	(system (%current-system))
04086015	104	(linux linux-libre)
735c6dd7	105	initrd
f200b03e	106	(qemu qemu-headless)
04086015	107	(env-vars '())
1aa0033b	108	(modules
ade5ce7a LC	109	'((guix build vm)
	110	(guix build linux-initrd)
	111	(guix build utils)))
04086015 LC	112	(guile-for-build
	113	(%guile-for-build))
	114
	115	(make-disk-image? #f)
ca85d7bc	116	(references-graphs #f)
defa1b9b	117	(memory-size 256)
04086015 LC	118	(disk-image-size
04086015 LC	119	(* 100 (expt 2 20))))
735c6dd7	120	"Evaluate EXP in a QEMU virtual machine running LINUX with INITRD (a
1aa0033b	121	derivation). In the virtual machine, EXP has access to all its inputs from the
735c6dd7	122	store; it should put its output files in the `/xchg' directory, which is
defa1b9b LC	123	copied to the derivation's output when the VM terminates. The virtual machine
defa1b9b LC	124	runs with MEMORY-SIZE MiB of memory.
04086015 LC	125
04086015 LC	126	When MAKE-DISK-IMAGE? is true, then create a QEMU disk image of
ca85d7bc LC	127	DISK-IMAGE-SIZE bytes and return it.
ca85d7bc LC	128
1aa0033b	129	MODULES is the set of modules imported in the execution environment of EXP.
ade5ce7a	130
ca85d7bc LC	131	When REFERENCES-GRAPHS is true, it must be a list of file name/store path
	132	pairs, as for `derivation'. The files containing the reference graphs are
	133	made available under the /xchg CIFS share."
d9f0a237	134	(mlet* %store-monad
1aa0033b LC	135	((module-dir (imported-modules modules))
	136	(compiled (compiled-modules modules))
	137	(user-builder (gexp->file "builder-in-linux-vm" exp))
02100028 LC	138	(loader (gexp->file "linux-vm-loader"
	139	#~(begin
	140	(set! %load-path
	141	(cons #$module-dir %load-path))
	142	(set! %load-compiled-path
	143	(cons #$compiled
	144	%load-compiled-path))
	145	(primitive-load #$user-builder))))
d9f0a237	146	(coreutils -> (car (assoc-ref %final-inputs "coreutils")))
d4254711	147	(initrd (if initrd ; use the default initrd?
735c6dd7	148	(return initrd)
83bcd0b8 LC	149	(qemu-initrd %linux-vm-file-systems
83bcd0b8 LC	150	#:guile-modules-in-chroot? #t))))
1aa0033b LC	151
	152	(define builder
	153	;; Code that launches the VM that evaluates EXP.
	154	#~(begin
	155	(use-modules (guix build utils)
	156	(guix build vm))
	157
	158	(let ((inputs '#$(list qemu coreutils))
	159	(linux (string-append #$linux "/bzImage"))
	160	(initrd (string-append #$initrd "/initrd"))
	161	(loader #$loader)
	162	(graphs '#$(match references-graphs
	163	(((graph-files . _) ...) graph-files)
	164	(_ #f))))
	165
	166	(set-path-environment-variable "PATH" '("bin") inputs)
	167
	168	(load-in-linux-vm loader
	169	#:output #$output
	170	#:linux linux #:initrd initrd
	171	#:memory-size #$memory-size
	172	#:make-disk-image? #$make-disk-image?
	173	#:disk-image-size #$disk-image-size
	174	#:references-graphs graphs))))
	175
	176	(gexp->derivation name builder
	177	;; TODO: Require the "kvm" feature.
	178	#:system system
	179	#:env-vars env-vars
	180	#:modules `((guix build utils)
	181	(guix build vm)
	182	(guix build linux-initrd))
	183	#:guile-for-build guile-for-build
	184	#:references-graphs references-graphs)))
d9f0a237 LC	185
d9f0a237 LC	186	(define* (qemu-image #:key
04086015 LC	187	(name "qemu-image")
04086015 LC	188	(system (%current-system))
1aa0033b	189	(qemu qemu-headless)
04086015	190	(disk-image-size (* 100 (expt 2 20)))
03ddfaf5	191	(file-system-type "ext4")
0e2ddecd	192	grub-configuration
30f25b03	193	(initialize-store? #f)
785859d3	194	(populate #f)
002e5ba8	195	(inputs-to-copy '()))
03ddfaf5 LC	196	"Return a bootable, stand-alone QEMU image, with a root partition of type
	197	FILE-SYSTEM-TYPE. The returned image is a full disk image, with a GRUB
	198	installation that uses GRUB-CONFIGURATION as its configuration
	199	file (GRUB-CONFIGURATION must be the name of a file in the VM.)
93d44bd8 LC	200
93d44bd8 LC	201	INPUTS-TO-COPY is a list of inputs (as for packages) whose closure is copied
30f25b03 LC	202	into the image being built. When INITIALIZE-STORE? is true, initialize the
30f25b03 LC	203	store database in the image so that Guix can be used in the image.
785859d3	204
d5d0f286 LC	205	POPULATE is a list of directives stating directories or symlinks to be created
	206	in the disk image partition. It is evaluated once the image has been
	207	populated with INPUTS-TO-COPY. It can be used to provide additional files,
	208	such as /etc files."
d9f0a237 LC	209	(mlet %store-monad
d9f0a237 LC	210	((graph (sequence %store-monad
ef09fdfb	211	(map input->name+output inputs-to-copy))))
d9f0a237	212	(expression->derivation-in-linux-vm
1aa0033b LC	213	name
	214	#~(begin
	215	(use-modules (guix build vm)
	216	(guix build utils))
	217
	218	(let ((inputs
	219	'#$(append (list qemu parted grub e2fsprogs util-linux)
	220	(map (compose car (cut assoc-ref %final-inputs <>))
	221	'("sed" "grep" "coreutils" "findutils" "gawk"))
	222	(if initialize-store? (list guix) '())))
	223
	224	;; This variable is unused but allows us to add INPUTS-TO-COPY
	225	;; as inputs.
	226	(to-copy
	227	'#$(map (match-lambda
	228	((name thing) thing)
	229	((name thing output) `(,thing ,output)))
	230	inputs-to-copy)))
	231
	232	(set-path-environment-variable "PATH" '("bin" "sbin") inputs)
	233
	234	(let ((graphs '#$(match inputs-to-copy
	235	(((names . _) ...)
	236	names))))
	237	(initialize-hard-disk #:grub.cfg #$grub-configuration
	238	#:closures-to-copy graphs
	239	#:disk-image-size #$disk-image-size
03ddfaf5	240	#:file-system-type #$file-system-type
1aa0033b LC	241	#:initialize-store? #$initialize-store?
	242	#:directives '#$populate)
	243	(reboot))))
d9f0a237	244	#:system system
d9f0a237 LC	245	#:make-disk-image? #t
d9f0a237 LC	246	#:disk-image-size disk-image-size
ade5ce7a	247	#:references-graphs graph)))
04086015 LC	248
	249	\f
	250	;;;
aedb72fb	251	;;; Stand-alone VM image.
04086015 LC	252	;;;
04086015 LC	253
fd3bfc44 LC	254	(define (operating-system-build-gid os)
	255	"Return as a monadic value the group id for build users of OS, or #f."
	256	(anym %store-monad
	257	(lambda (service)
	258	(and (equal? '(guix-daemon)
	259	(service-provision service))
	260	(match (service-user-groups service)
	261	((group)
	262	(user-group-id group)))))
	263	(operating-system-services os)))
	264
	265	(define (operating-system-default-contents os)
	266	"Return a list of directives suitable for 'system-qemu-image' describing the
	267	basic contents of the root file system of OS."
682b6599 LC	268	(define (user-directories user)
	269	(let ((home (user-account-home-directory user))
	270	;; XXX: Deal with automatically allocated ids.
	271	(uid (or (user-account-uid user) 0))
	272	(gid (or (user-account-gid user) 0))
2e4e01ee	273	(root (string-append "/var/guix/profiles/per-user/"
682b6599	274	(user-account-name user))))
1aa0033b LC	275	#~((directory #$root #$uid #$gid)
1aa0033b LC	276	(directory #$home #$uid #$gid))))
682b6599	277
f6a9d048	278	(mlet* %store-monad ((os-drv (operating-system-derivation os))
f6a9d048	279	(build-gid (operating-system-build-gid os))
1aa0033b LC	280	(profile (operating-system-profile os)))
	281	(return #~((directory #$(%store-prefix) 0 #$(or build-gid 0))
	282	(directory "/etc")
	283	(directory "/var/log") ; for dmd
	284	(directory "/var/run/nscd")
	285	(directory "/var/guix/gcroots")
	286	("/var/guix/gcroots/system" -> #$os-drv)
	287	(directory "/run")
	288	("/run/current-system" -> #$profile)
	289	(directory "/bin")
	290	("/bin/sh" -> "/run/current-system/bin/bash")
	291	(directory "/tmp")
	292	(directory "/var/guix/profiles/per-user/root" 0 0)
	293
	294	(directory "/root" 0 0) ; an exception
	295	#$@(append-map user-directories
	296	(operating-system-users os))))))
fd3bfc44	297
0b14d1d7	298	(define* (system-qemu-image os
66f23d66 LC	299	#:key
	300	(file-system-type "ext4")
	301	(disk-image-size (* 900 (expt 2 20))))
	302	"Return the derivation of a freestanding QEMU image of DISK-IMAGE-SIZE bytes
	303	of the GNU system as described by OS."
	304	(let ((os (operating-system (inherit os)
	305	;; The mounted file systems are under our control.
	306	(file-systems (list (file-system
	307	(mount-point "/")
	308	(device "/dev/sda1")
	309	(type file-system-type)))))))
	310	(mlet* %store-monad
	311	((os-drv (operating-system-derivation os))
	312	(os-dir -> (derivation->output-path os-drv))
	313	(grub.cfg -> (string-append os-dir "/grub.cfg"))
	314	(populate (operating-system-default-contents os)))
	315	(qemu-image #:grub-configuration grub.cfg
	316	#:populate populate
	317	#:disk-image-size disk-image-size
	318	#:file-system-type file-system-type
	319	#:initialize-store? #t
	320	#:inputs-to-copy `(("system" ,os-drv))))))
04086015	321
83bcd0b8 LC	322	(define (virtualized-operating-system os)
	323	"Return an operating system based on OS suitable for use in a virtualized
	324	environment with the store shared with the host."
	325	(operating-system (inherit os)
	326	(initrd (cut qemu-initrd <> #:volatile-root? #t))
	327	(file-systems (list (file-system
	328	(mount-point "/")
	329	(device "/dev/vda1")
03ddfaf5	330	(type "ext4"))
83bcd0b8 LC	331	(file-system
	332	(mount-point (%store-prefix))
	333	(device "store")
	334	(type "9p")
	335	(needed-for-boot? #t)
	336	(options "trans=virtio"))))))
	337
fd3bfc44	338	(define* (system-qemu-image/shared-store
0b14d1d7	339	os
fd3bfc44 LC	340	#:key (disk-image-size (* 15 (expt 2 20))))
	341	"Return a derivation that builds a QEMU image of OS that shares its store
	342	with the host."
	343	(mlet* %store-monad
	344	((os-drv (operating-system-derivation os))
	345	(os-dir -> (derivation->output-path os-drv))
	346	(grub.cfg -> (string-append os-dir "/grub.cfg"))
	347	(populate (operating-system-default-contents os)))
	348	;; TODO: Initialize the database so Guix can be used in the guest.
	349	(qemu-image #:grub-configuration grub.cfg
	350	#:populate populate
	351	#:disk-image-size disk-image-size)))
	352
	353	(define* (system-qemu-image/shared-store-script
0b14d1d7	354	os
fd3bfc44	355	#:key
1f3838ac	356	(qemu qemu)
fd3bfc44 LC	357	(graphic? #t))
	358	"Return a derivation that builds a script to run a virtual machine image of
	359	OS that shares its store with the host."
c47f0d8b	360	(mlet* %store-monad
83bcd0b8	361	((os -> (virtualized-operating-system os))
c47f0d8b	362	(os-drv (operating-system-derivation os))
c47f0d8b	363	(image (system-qemu-image/shared-store os)))
fd3bfc44	364	(define builder
02100028 LC	365	#~(call-with-output-file #$output
	366	(lambda (port)
	367	(display
	368	(string-append "#!" #$bash "/bin/sh
	369	exec " #$qemu "/bin/qemu-system-x86_64 -enable-kvm -no-reboot -net nic,model=virtio \
	370	-virtfs local,path=" #$(%store-prefix) ",security_model=none,mount_tag=store \
1f3838ac	371	-net user \
02100028	372	-kernel " #$(operating-system-kernel os) "/bzImage \
83bcd0b8	373	-initrd " #$os-drv "/initrd \
02100028 LC	374	-append \"" #$(if graphic? "" "console=ttyS0 ")
	375	"--load=" #$os-drv "/boot --root=/dev/vda1\" \
	376	-drive file=" #$image
fd3bfc44	377	",if=virtio,cache=writeback,werror=report,readonly\n")
02100028 LC	378	port)
	379	(chmod port #o555))))
	380
	381	(gexp->derivation "run-vm.sh" builder)))
fd3bfc44	382
04086015	383	;;; vm.scm ends here