1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
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
|
