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| author | Ludovic Courtès <ludo@gnu.org> | 2018-01-09 16:48:35 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2018-01-11 14:42:31 +0100 |
| commit | 71b98b9de9d2658f4787d2fb77609a95b09ff3ea (patch) | |
| tree | 4bad84392213b614269f2651e4f2c58d0a4fd8f2 /gnu/services/virtualization.scm | |
| parent | 88554b5d055b685131ab37d560d5c671a22cef8f (diff) | |
| download | guix-71b98b9de9d2658f4787d2fb77609a95b09ff3ea.tar guix-71b98b9de9d2658f4787d2fb77609a95b09ff3ea.tar.gz | |
services: qemu-binfmt: Extend guix-daemon with extra chroot directories.
Fixes <https://bugs.gnu.org/20239>.
* gnu/services/virtualization.scm (<qemu-binfmt-configuration>)[guix-support?]:
New field.
(qemu-binfmt-guix-chroot): New procedure.
(qemu-binfmt-service-type)[extensions]: Add GUIX-SERVICE-TYPE.
* doc/guix.texi (Virtualization Services): Document 'guix-support?'.
(Additional Build Options): Mention binfmt_misc and offloading under
'--system'.
Diffstat (limited to 'gnu/services/virtualization.scm')
| -rw-r--r-- | gnu/services/virtualization.scm | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/gnu/services/virtualization.scm b/gnu/services/virtualization.scm index 0a8f67fb8e..bf71e7f26a 100644 --- a/gnu/services/virtualization.scm +++ b/gnu/services/virtualization.scm @@ -662,7 +662,9 @@ potential infinite waits blocking libvirt.")) (qemu qemu-binfmt-configuration-qemu (default qemu)) (platforms qemu-binfmt-configuration-platforms - (default '()))) ;safest default + (default '())) ;safest default + (guix-support? qemu-binfmt-configuration-guix-support? + (default #f))) (define (qemu-platform->binfmt qemu platform) "Return a gexp that evaluates to a binfmt string for PLATFORM, using the @@ -724,6 +726,19 @@ given QEMU package." '#$(map qemu-platform-name platforms)) #f))))))) +(define qemu-binfmt-guix-chroot + (match-lambda + ;; Add QEMU and its dependencies to the guix-daemon chroot so that our + ;; binfmt_misc handlers work in the chroot (otherwise 'execve' would fail + ;; with ENOENT.) + ;; + ;; The 'F' flag of binfmt_misc is meant to address this problem by loading + ;; the interpreter upfront rather than lazily, but apparently that is + ;; insufficient (perhaps it loads the 'qemu-ARCH' binary upfront but looks + ;; up its dependencies lazily?). + (($ <qemu-binfmt-configuration> qemu platforms guix?) + (if guix? (list qemu) '())))) + (define qemu-binfmt-service-type ;; TODO: Make a separate binfmt_misc service out of this? (service-type (name 'qemu-binfmt) @@ -732,7 +747,9 @@ given QEMU package." (const (list %binary-format-file-system))) (service-extension shepherd-root-service-type - qemu-binfmt-shepherd-services))) + qemu-binfmt-shepherd-services) + (service-extension guix-service-type + qemu-binfmt-guix-chroot))) (default-value (qemu-binfmt-configuration)) (description "This service supports transparent emulation of binaries |