diff options
Diffstat (limited to 'gnu/system/vm.scm')
| -rw-r--r-- | gnu/system/vm.scm | 125 |
1 files changed, 103 insertions, 22 deletions
diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm index 5407522652..f36cfd0318 100644 --- a/gnu/system/vm.scm +++ b/gnu/system/vm.scm @@ -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: @@ -323,8 +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 . _) ...) @@ -441,6 +444,35 @@ such as /etc files." tzdata guix)))) +(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." + (mlet* %store-monad ((os-drv (operating-system-derivation os)) + (os-dir -> (derivation->output-path os-drv)) + (build-user-gid (operating-system-build-gid os))) + (return `((directory "/nix/store" 0 ,(or build-user-gid 0)) + (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))))) + (define* (system-qemu-image #:optional (os %demo-operating-system) #:key (disk-image-size (* 900 (expt 2 20)))) "Return the derivation of a QEMU image of DISK-IMAGE-SIZE bytes of the GNU @@ -449,29 +481,78 @@ 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 + #:optional (os %demo-operating-system) + #: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 + #:optional (os %demo-operating-system) + #: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 |