517 lines
22 KiB
Scheme
517 lines
22 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2013, 2014, 2015, 2016 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 (guix records)
|
||
|
||
#:use-module ((gnu build vm)
|
||
#:select (qemu-command))
|
||
#:use-module (gnu packages base)
|
||
#:use-module (gnu packages guile)
|
||
#:use-module (gnu packages gawk)
|
||
#:use-module (gnu packages bash)
|
||
#:use-module (gnu packages less)
|
||
#:use-module (gnu packages qemu)
|
||
#:use-module (gnu packages disk)
|
||
#: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 pam)
|
||
#:use-module (gnu system linux-initrd)
|
||
#:use-module (gnu system grub)
|
||
#:use-module (gnu system file-systems)
|
||
#: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
|
||
system-disk-image))
|
||
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; Tools to evaluate build expressions within virtual machines.
|
||
;;;
|
||
;;; Code:
|
||
|
||
(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")
|
||
(check? #f))
|
||
(file-system
|
||
(mount-point "/xchg")
|
||
(device "xchg")
|
||
(type "9p")
|
||
(needed-for-boot? #t)
|
||
(options "trans=virtio")
|
||
(check? #f))))
|
||
|
||
(define* (expression->derivation-in-linux-vm name exp
|
||
#:key
|
||
(system (%current-system))
|
||
(linux linux-libre)
|
||
initrd
|
||
(qemu qemu-minimal)
|
||
(env-vars '())
|
||
(modules
|
||
'((gnu build vm)
|
||
(gnu build install)
|
||
(gnu build linux-boot)
|
||
(gnu build linux-modules)
|
||
(gnu build file-systems)
|
||
(guix elf)
|
||
(guix records)
|
||
(guix build utils)
|
||
(guix build syscalls)
|
||
(guix build bournish)
|
||
(guix build store-copy)))
|
||
(guile-for-build
|
||
(%guile-for-build))
|
||
|
||
(make-disk-image? #f)
|
||
(references-graphs #f)
|
||
(memory-size 256)
|
||
(disk-image-format "qcow2")
|
||
(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 type
|
||
DISK-IMAGE-FORMAT (e.g., 'qcow2' or 'raw'), 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 #$user-builder))))
|
||
(coreutils -> (canonical-package coreutils))
|
||
(initrd (if initrd ; use the default initrd?
|
||
(return initrd)
|
||
(base-initrd %linux-vm-file-systems
|
||
#:linux linux
|
||
#:virtio? #t
|
||
#:qemu-networking? #t))))
|
||
|
||
(define builder
|
||
;; Code that launches the VM that evaluates EXP.
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(gnu build vm))
|
||
|
||
(let ((inputs '#$(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? #$make-disk-image?
|
||
#:disk-image-format #$disk-image-format
|
||
#:disk-image-size #$disk-image-size
|
||
#:references-graphs graphs))))
|
||
|
||
(gexp->derivation name builder
|
||
;; TODO: Require the "kvm" feature.
|
||
#:system system
|
||
#:env-vars env-vars
|
||
#:modules modules
|
||
#:guile-for-build guile-for-build
|
||
#:references-graphs references-graphs)))
|
||
|
||
(define* (qemu-image #:key
|
||
(name "qemu-image")
|
||
(system (%current-system))
|
||
(qemu qemu-minimal)
|
||
(disk-image-size (* 100 (expt 2 20)))
|
||
(disk-image-format "qcow2")
|
||
(file-system-type "ext4")
|
||
file-system-label
|
||
os-derivation
|
||
grub-configuration
|
||
(register-closures? #t)
|
||
(inputs '())
|
||
copy-inputs?)
|
||
"Return a bootable, stand-alone QEMU image of type DISK-IMAGE-FORMAT (e.g.,
|
||
'qcow2' or 'raw'), with a root partition of type FILE-SYSTEM-TYPE.
|
||
Optionally, FILE-SYSTEM-LABEL can be specified as the volume name for the root
|
||
partition. The returned image is a full disk image that runs OS-DERIVATION,
|
||
with a GRUB installation that uses GRUB-CONFIGURATION as its configuration
|
||
file (GRUB-CONFIGURATION must be the name of a file in the VM.)
|
||
|
||
INPUTS is a list of inputs (as for packages). When COPY-INPUTS? is true, copy
|
||
all of INPUTS into the image being built. When REGISTER-CLOSURES? is true,
|
||
register INPUTS in the store database of the image so that Guix can be used in
|
||
the image."
|
||
(expression->derivation-in-linux-vm
|
||
name
|
||
#~(begin
|
||
(use-modules (gnu build vm)
|
||
(guix build utils))
|
||
|
||
(let ((inputs
|
||
'#$(append (list qemu parted grub e2fsprogs)
|
||
(map canonical-package
|
||
(list sed grep coreutils findutils gawk))
|
||
(if register-closures? (list guix) '())))
|
||
|
||
;; This variable is unused but allows us to add INPUTS-TO-COPY
|
||
;; as inputs.
|
||
(to-register
|
||
'#$(map (match-lambda
|
||
((name thing) thing)
|
||
((name thing output) `(,thing ,output)))
|
||
inputs)))
|
||
|
||
(set-path-environment-variable "PATH" '("bin" "sbin") inputs)
|
||
|
||
(let* ((graphs '#$(match inputs
|
||
(((names . _) ...)
|
||
names)))
|
||
(initialize (root-partition-initializer
|
||
#:closures graphs
|
||
#:copy-closures? #$copy-inputs?
|
||
#:register-closures? #$register-closures?
|
||
#:system-directory #$os-derivation))
|
||
(partitions (list (partition
|
||
(size #$(- disk-image-size
|
||
(* 10 (expt 2 20))))
|
||
(label #$file-system-label)
|
||
(file-system #$file-system-type)
|
||
(bootable? #t)
|
||
(initializer initialize)))))
|
||
(initialize-hard-disk "/dev/vda"
|
||
#:partitions partitions
|
||
#:grub.cfg #$grub-configuration)
|
||
(reboot))))
|
||
#:system system
|
||
#:make-disk-image? #t
|
||
#:disk-image-size disk-image-size
|
||
#:disk-image-format disk-image-format
|
||
#:references-graphs inputs))
|
||
|
||
|
||
;;;
|
||
;;; VM and disk images.
|
||
;;;
|
||
|
||
(define* (system-disk-image os
|
||
#:key
|
||
(name "disk-image")
|
||
(file-system-type "ext4")
|
||
(disk-image-size (* 900 (expt 2 20)))
|
||
(volatile? #t))
|
||
"Return the derivation of a disk image of DISK-IMAGE-SIZE bytes of the
|
||
system described by OS. Said image can be copied on a USB stick as is. When
|
||
VOLATILE? is true, the root file system is made volatile; this is useful
|
||
to USB sticks meant to be read-only."
|
||
(define root-label
|
||
;; Volume name of the root file system. Since we don't know which device
|
||
;; will hold it, we use the volume name to find it (using the UUID would
|
||
;; be even better, but somewhat less convenient.)
|
||
"gnu-disk-image")
|
||
|
||
(define file-systems-to-keep
|
||
(remove (lambda (fs)
|
||
(string=? (file-system-mount-point fs) "/"))
|
||
(operating-system-file-systems os)))
|
||
|
||
(let ((os (operating-system (inherit os)
|
||
;; Since this is meant to be used on real hardware, don't
|
||
;; install QEMU networking or anything like that. Assume USB
|
||
;; mass storage devices (usb-storage.ko) are available.
|
||
(initrd (lambda (file-systems . rest)
|
||
(apply base-initrd file-systems
|
||
#:volatile-root? #t
|
||
rest)))
|
||
|
||
;; Force our own root file system.
|
||
(file-systems (cons (file-system
|
||
(mount-point "/")
|
||
(device root-label)
|
||
(title 'label)
|
||
(type file-system-type))
|
||
file-systems-to-keep)))))
|
||
|
||
(mlet* %store-monad ((os-drv (operating-system-derivation os))
|
||
(grub.cfg (operating-system-grub.cfg os)))
|
||
(qemu-image #:name name
|
||
#:os-derivation os-drv
|
||
#:grub-configuration grub.cfg
|
||
#:disk-image-size disk-image-size
|
||
#:disk-image-format "raw"
|
||
#:file-system-type file-system-type
|
||
#:file-system-label root-label
|
||
#:copy-inputs? #t
|
||
#:register-closures? #t
|
||
#:inputs `(("system" ,os-drv)
|
||
("grub.cfg" ,grub.cfg))))))
|
||
|
||
(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."
|
||
(define file-systems-to-keep
|
||
;; Keep only file systems other than root and not normally bound to real
|
||
;; devices.
|
||
(remove (lambda (fs)
|
||
(let ((target (file-system-mount-point fs))
|
||
(source (file-system-device fs)))
|
||
(or (string=? target "/")
|
||
(string-prefix? "/dev/" source))))
|
||
(operating-system-file-systems os)))
|
||
|
||
(let ((os (operating-system (inherit os)
|
||
;; Use an initrd with the whole QEMU shebang.
|
||
(initrd (lambda (file-systems . rest)
|
||
(apply base-initrd file-systems
|
||
#:virtio? #t
|
||
#:qemu-networking? #t
|
||
rest)))
|
||
|
||
;; Force our own root file system.
|
||
(file-systems (cons (file-system
|
||
(mount-point "/")
|
||
(device "/dev/sda1")
|
||
(type file-system-type))
|
||
file-systems-to-keep)))))
|
||
(mlet* %store-monad
|
||
((os-drv (operating-system-derivation os))
|
||
(grub.cfg (operating-system-grub.cfg os)))
|
||
(qemu-image #:os-derivation os-drv
|
||
#:grub-configuration grub.cfg
|
||
#:disk-image-size disk-image-size
|
||
#:file-system-type file-system-type
|
||
#:inputs `(("system" ,os-drv)
|
||
("grub.cfg" ,grub.cfg))
|
||
#:copy-inputs? #t))))
|
||
|
||
|
||
;;;
|
||
;;; VMs that share file systems with the host.
|
||
;;;
|
||
|
||
(define (file-system->mount-tag fs)
|
||
"Return a 9p mount tag for host file system FS."
|
||
;; QEMU mount tags cannot contain slashes and cannot start with '_'.
|
||
;; Compute an identifier that corresponds to the rules.
|
||
(string-append "TAG"
|
||
(string-map (match-lambda
|
||
(#\/ #\_)
|
||
(chr chr))
|
||
fs)))
|
||
|
||
(define (mapping->file-system mapping)
|
||
"Return a 9p file system that realizes MAPPING."
|
||
(match mapping
|
||
(($ <file-system-mapping> source target writable?)
|
||
(file-system
|
||
(mount-point target)
|
||
(device (file-system->mount-tag source))
|
||
(type "9p")
|
||
(flags (if writable? '() '(read-only)))
|
||
(options (string-append "trans=virtio"))
|
||
(check? #f)
|
||
(create-mount-point? #t)))))
|
||
|
||
(define (virtualized-operating-system os mappings)
|
||
"Return an operating system based on OS suitable for use in a virtualized
|
||
environment with the store shared with the host. MAPPINGS is a list of
|
||
<file-system-mapping> to realize in the virtualized OS."
|
||
(define user-file-systems
|
||
;; Remove file systems that conflict with those added below, or that are
|
||
;; normally bound to real devices.
|
||
(remove (lambda (fs)
|
||
(let ((target (file-system-mount-point fs))
|
||
(source (file-system-device fs)))
|
||
(or (string=? target (%store-prefix))
|
||
(string=? target "/")
|
||
(and (eq? 'device (file-system-title fs))
|
||
(string-prefix? "/dev/" source)))))
|
||
(operating-system-file-systems os)))
|
||
|
||
(operating-system (inherit os)
|
||
(initrd (lambda (file-systems . rest)
|
||
(apply base-initrd file-systems
|
||
#:volatile-root? #t
|
||
#:virtio? #t
|
||
#:qemu-networking? #t
|
||
rest)))
|
||
|
||
;; Disable swap.
|
||
(swap-devices '())
|
||
|
||
(file-systems (cons* (file-system
|
||
(mount-point "/")
|
||
(device "/dev/vda1")
|
||
(type "ext4"))
|
||
|
||
(file-system (inherit
|
||
(mapping->file-system %store-mapping))
|
||
(needed-for-boot? #t))
|
||
|
||
(append (map mapping->file-system mappings)
|
||
user-file-systems)))))
|
||
|
||
(define* (system-qemu-image/shared-store
|
||
os
|
||
#:key
|
||
full-boot?
|
||
(disk-image-size (* (if full-boot? 500 15) (expt 2 20))))
|
||
"Return a derivation that builds a QEMU image of OS that shares its store
|
||
with the host.
|
||
|
||
When FULL-BOOT? is true, return an image that does a complete boot sequence,
|
||
bootloaded included; thus, make a disk image that contains everything the
|
||
bootloader refers to: OS kernel, initrd, bootloader data, etc."
|
||
(mlet* %store-monad ((os-drv (operating-system-derivation os))
|
||
(grub.cfg (operating-system-grub.cfg os)))
|
||
;; XXX: When FULL-BOOT? is true, we end up creating an image that contains
|
||
;; GRUB.CFG and all its dependencies, including the output of OS-DRV.
|
||
;; This is more than needed (we only need the kernel, initrd, GRUB for its
|
||
;; font, and the background image), but it's hard to filter that.
|
||
(qemu-image #:os-derivation os-drv
|
||
#:grub-configuration grub.cfg
|
||
#:disk-image-size disk-image-size
|
||
#:inputs (if full-boot?
|
||
`(("grub.cfg" ,grub.cfg))
|
||
'())
|
||
|
||
;; XXX: Passing #t here is too slow, so let it off by default.
|
||
#:register-closures? #f
|
||
#:copy-inputs? full-boot?)))
|
||
|
||
(define* (common-qemu-options image shared-fs)
|
||
"Return the a string-value gexp with the common QEMU options to boot IMAGE,
|
||
with '-virtfs' options for the host file systems listed in SHARED-FS."
|
||
(define (virtfs-option fs)
|
||
#~(string-append "-virtfs local,path=\"" #$fs
|
||
"\",security_model=none,mount_tag=\""
|
||
#$(file-system->mount-tag fs)
|
||
"\" "))
|
||
|
||
#~(string-append
|
||
" -enable-kvm -no-reboot -net nic,model=virtio \
|
||
" #$@(map virtfs-option shared-fs) " \
|
||
-net user \
|
||
-serial stdio -vga std \
|
||
-drive file=" #$image
|
||
",if=virtio,cache=writeback,werror=report,readonly \
|
||
-m 256"))
|
||
|
||
(define* (system-qemu-image/shared-store-script os
|
||
#:key
|
||
(qemu qemu)
|
||
(graphic? #t)
|
||
(mappings '())
|
||
full-boot?
|
||
(disk-image-size
|
||
(* (if full-boot? 500 15)
|
||
(expt 2 20))))
|
||
"Return a derivation that builds a script to run a virtual machine image of
|
||
OS that shares its store with the host.
|
||
|
||
MAPPINGS is a list of <file-system-mapping> specifying mapping of host file
|
||
systems into the guest.
|
||
|
||
When FULL-BOOT? is true, the returned script runs everything starting from the
|
||
bootloader; otherwise it directly starts the operating system kernel. The
|
||
DISK-IMAGE-SIZE parameter specifies the size in bytes of the root disk image;
|
||
it is mostly useful when FULL-BOOT? is true."
|
||
(mlet* %store-monad ((os -> (virtualized-operating-system os mappings))
|
||
(os-drv (operating-system-derivation os))
|
||
(image (system-qemu-image/shared-store
|
||
os
|
||
#:full-boot? full-boot?
|
||
#:disk-image-size disk-image-size)))
|
||
(define builder
|
||
#~(call-with-output-file #$output
|
||
(lambda (port)
|
||
(display
|
||
(string-append "#!" #$bash "/bin/sh
|
||
exec " #$qemu "/bin/" #$(qemu-command (%current-system))
|
||
|
||
#$@(if full-boot?
|
||
#~()
|
||
#~(" -kernel " #$(operating-system-kernel os) "/bzImage \
|
||
-initrd " #$os-drv "/initrd \
|
||
-append \"" #$(if graphic? "" "console=ttyS0 ")
|
||
"--system=" #$os-drv " --load=" #$os-drv "/boot --root=/dev/vda1 "
|
||
(string-join (list #+@(operating-system-kernel-arguments os))) "\" "))
|
||
#$(common-qemu-options image
|
||
(map file-system-mapping-source
|
||
(cons %store-mapping mappings)))
|
||
" \"$@\"\n")
|
||
port)
|
||
(chmod port #o555))))
|
||
|
||
(gexp->derivation "run-vm.sh" builder)))
|
||
|
||
;;; vm.scm ends here
|