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-rw-r--r--gnu/system/vm.scm203
1 files changed, 137 insertions, 66 deletions
diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index e75c09d859..b8b0274f1f 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -35,7 +35,6 @@
#:use-module (gnu packages zile)
#:use-module (gnu packages grub)
#:use-module (gnu packages linux)
- #:use-module (gnu packages linux-initrd)
#:use-module (gnu packages package-management)
#:use-module ((gnu packages make-bootstrap)
#:select (%guile-static-stripped))
@@ -43,9 +42,10 @@
#: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 dmd)
#:use-module (gnu system)
+ #:use-module (gnu services)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
@@ -53,7 +53,9 @@
#:export (expression->derivation-in-linux-vm
qemu-image
- system-qemu-image))
+ system-qemu-image
+ system-qemu-image/shared-store
+ system-qemu-image/shared-store-script))
;;; Commentary:
@@ -67,7 +69,7 @@
(system (%current-system))
(inputs '())
(linux linux-libre)
- (initrd qemu-initrd)
+ initrd
(qemu qemu/smb-shares)
(env-vars '())
(modules '())
@@ -78,10 +80,10 @@
(references-graphs #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.
+ "Evaluate EXP in a QEMU virtual machine running LINUX with INITRD (a
+derivation). 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.
@@ -154,7 +156,7 @@ made available under the /xchg CIFS share."
(#f '())))
(and (zero?
- (system* qemu "-nographic" "-no-reboot"
+ (system* qemu "-enable-kvm" "-nographic" "-no-reboot"
"-net" "nic,model=e1000"
"-net" (string-append "user,smb=" (getcwd))
"-kernel" linux
@@ -178,6 +180,9 @@ made available under the /xchg CIFS share."
(user-builder (text-file "builder-in-linux-vm"
(object->string exp*)))
(coreutils -> (car (assoc-ref %final-inputs "coreutils")))
+ (initrd (if initrd ; use the default initrd?
+ (return initrd)
+ (qemu-initrd #:guile-modules-in-chroot? #t)))
(inputs (lower-inputs `(("qemu" ,qemu)
("linux" ,linux)
("initrd" ,initrd)
@@ -185,6 +190,7 @@ made available under the /xchg CIFS share."
("builder" ,user-builder)
,@inputs))))
(derivation-expression name builder
+ ;; TODO: Require the "kvm" feature.
#:system system
#:inputs inputs
#:env-vars env-vars
@@ -290,18 +296,18 @@ such as /etc files."
(assoc-ref %build-inputs "gawk") "/bin"))
(display "creating partition table...\n")
- (and (zero? (system* parted "/dev/vda" "mklabel" "msdos"
+ (and (zero? (system* parted "/dev/sda" "mklabel" "msdos"
"mkpart" "primary" "ext2" "1MiB"
,(format #f "~aB"
(- disk-image-size
(* 5 (expt 2 20))))))
(begin
(display "creating ext3 partition...\n")
- (and (zero? (system* mkfs "-F" "/dev/vda1"))
+ (and (zero? (system* mkfs "-F" "/dev/sda1"))
(let ((store (string-append "/fs" ,%store-directory)))
(display "mounting partition...\n")
(mkdir "/fs")
- (mount "/dev/vda1" "/fs" "ext3")
+ (mount "/dev/sda1" "/fs" "ext3")
(mkdir-p "/fs/boot/grub")
(symlink grub.cfg "/fs/boot/grub/grub.cfg")
@@ -319,8 +325,9 @@ such as /etc files."
;; Optionally, register the inputs in the image's store.
(let* ((guix (assoc-ref %build-inputs "guix"))
- (register (string-append guix
- "/sbin/guix-register")))
+ (register (and guix
+ (string-append guix
+ "/sbin/guix-register"))))
,@(if initialize-store?
(match inputs-to-copy
(((graph-files . _) ...)
@@ -375,7 +382,7 @@ such as /etc files."
(and (zero?
(system* grub "--no-floppy"
"--boot-directory" "/fs/boot"
- "/dev/vda"))
+ "/dev/sda"))
(zero? (system* umount "/fs"))
(reboot))))))))
#:system system
@@ -407,37 +414,52 @@ such as /etc files."
;;; Stand-alone VM image.
;;;
-(define %demo-operating-system
- (operating-system
- (host-name "gnu")
- (timezone "Europe/Paris")
- (locale "en_US.UTF-8")
- (users (list (user-account
- (name "guest")
- (password "")
- (uid 1000) (gid 100)
- (comment "Guest of GNU")
- (home-directory "/home/guest"))))
- (packages (list coreutils
- bash
- guile-2.0
- dmd
- gcc-final
- ld-wrapper ; must come before BINUTILS
- binutils-final
- glibc-final
- inetutils
- findutils
- grep
- sed
- procps
- psmisc
- zile
- less
- tzdata
- guix))))
-
-(define* (system-qemu-image #:optional (os %demo-operating-system)
+(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/nix/profiles/per-user/"
+ (user-account-name user))))
+ `((directory ,root ,uid ,gid)
+ (directory ,home ,uid ,gid))))
+
+ (mlet* %store-monad ((os-drv (operating-system-derivation os))
+ (os-dir -> (derivation->output-path os-drv))
+ (build-gid (operating-system-build-gid os))
+ (profile (operating-system-profile-directory os)))
+ (return `((directory "/nix/store" 0 ,(or build-gid 0))
+ (directory "/etc")
+ (directory "/var/log") ; for dmd
+ (directory "/var/run/nscd")
+ (directory "/var/nix/gcroots")
+ ("/var/nix/gcroots/system" -> ,os-dir)
+ (directory "/run")
+ ("/run/current-system" -> ,profile)
+ (directory "/bin")
+ ("/bin/sh" -> "/run/current-system/bin/bash")
+ (directory "/tmp")
+ (directory "/var/nix/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 (disk-image-size (* 900 (expt 2 20))))
"Return the derivation of a QEMU image of DISK-IMAGE-SIZE bytes of the GNU
system as described by OS."
@@ -445,29 +467,78 @@ system as described by OS."
((os-drv (operating-system-derivation os))
(os-dir -> (derivation->output-path os-drv))
(grub.cfg -> (string-append os-dir "/grub.cfg"))
- (build-user-gid (anym %store-monad ; XXX
- (lambda (service)
- (and (equal? '(guix-daemon)
- (service-provision service))
- (match (service-user-groups service)
- ((group)
- (user-group-id group)))))
- (operating-system-services os)))
- (populate -> `((directory "/nix/store" 0 ,build-user-gid)
- (directory "/etc")
- (directory "/var/log") ; for dmd
- (directory "/var/run/nscd")
- (directory "/var/nix/gcroots")
- ("/var/nix/gcroots/system" -> ,os-dir)
- (directory "/tmp")
- (directory "/var/nix/profiles/per-user/root" 0 0)
- (directory "/var/nix/profiles/per-user/guest"
- 1000 100)
- (directory "/home/guest" 1000 100))))
+ (populate (operating-system-default-contents os)))
(qemu-image #:grub-configuration grub.cfg
#:populate populate
#:disk-image-size disk-image-size
#:initialize-store? #t
#:inputs-to-copy `(("system" ,os-drv)))))
+(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 (package (inherit qemu)
+ ;; FIXME/TODO: Use 9p instead of this hack.
+ (source (package-source qemu/smb-shares))))
+ (graphic? #t))
+ "Return a derivation that builds a script to run a virtual machine image of
+OS that shares its store with the host."
+ (let* ((initrd (qemu-initrd #:mounts `((cifs "/store" ,(%store-prefix)))
+ #:volatile-root? #t))
+ (os (operating-system (inherit os) (initrd initrd))))
+ (define builder
+ (mlet %store-monad ((image (system-qemu-image/shared-store os))
+ (qemu (package-file qemu
+ "bin/qemu-system-x86_64"))
+ (bash (package-file bash "bin/sh"))
+ (kernel (package-file (operating-system-kernel os)
+ "bzImage"))
+ (initrd initrd)
+ (os-drv (operating-system-derivation os)))
+ (return `(let ((out (assoc-ref %outputs "out")))
+ (call-with-output-file out
+ (lambda (port)
+ (display
+ (string-append "#!" ,bash "
+# TODO: -virtfs local,path=XXX,security_model=none,mount_tag=store
+exec " ,qemu " -enable-kvm -no-reboot -net nic,model=virtio \
+ -net user,smb=$PWD \
+ -kernel " ,kernel " -initrd "
+ ,(string-append (derivation->output-path initrd) "/initrd") " \
+-append \"" ,(if graphic? "" "console=ttyS0 ")
+"--load=" ,(derivation->output-path os-drv) "/boot --root=/dev/vda1\" \
+ -drive file=" ,(derivation->output-path image)
+ ",if=virtio,cache=writeback,werror=report,readonly\n")
+ port)))
+ (chmod out #o555)
+ #t))))
+
+ (mlet %store-monad ((image (system-qemu-image/shared-store os))
+ (initrd initrd)
+ (qemu (package->derivation qemu))
+ (bash (package->derivation bash))
+ (os (operating-system-derivation os))
+ (builder builder))
+ (derivation-expression "run-vm.sh" builder
+ #:inputs `(("qemu" ,qemu)
+ ("image" ,image)
+ ("bash" ,bash)
+ ("initrd" ,initrd)
+ ("os" ,os))))))
+
;;; vm.scm ends here
generated by cgit v1.2.3 (git 2.45.2) at 2024-08-01 13:25:44 +0000