diff options
| -rw-r--r-- | doc/guix.texi | 15 | ||||
| -rw-r--r-- | gnu/services/virtualization.scm | 4 |
2 files changed, 13 insertions, 6 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index df75ebd593f..89fa609124d 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -40911,6 +40911,10 @@ The image type name. Use @code{'hurd-qcow2} for a 32-bit image or The image object representing the disk image of this virtual machine (@pxref{System Images}). +Alternatively, this can be the file name (a string) of an image, which +is useful if you want the image to persist across service restarts---see +example below. + @item @code{disk-size} (default: @code{'guess}) The size of the disk image. @@ -41009,15 +41013,16 @@ with the following non-volatile secrets, unless they already exist: @end table @end deftp -Note that by default the VM image is volatile, i.e., once stopped the -contents are lost. If you want a stateful image instead, override the -configuration's @code{image} and @code{options} without -the @code{--snapshot} flag using something along these lines: +Note that by default the VM image is volatile---i.e., once the service +is stopped, the contents are lost. If you want a persistent image +instead, override the configuration's @code{image} and @code{options} +without the @option{--snapshot} flag using something along these lines: @lisp (service hurd-vm-service-type (hurd-vm-configuration - (image (const "/out/of/store/writable/hurd.img")) + ;; Specify an out-of-store, persistent image. + (image "/out/of/store/writable/hurd.img") (options '()))) @end lisp diff --git a/gnu/services/virtualization.scm b/gnu/services/virtualization.scm index 847c4ca7dda..bd1a5b870ce 100644 --- a/gnu/services/virtualization.scm +++ b/gnu/services/virtualization.scm @@ -1904,7 +1904,9 @@ is added to the OS specified in CONFIG." '()) #$@net-options #$@options - "--hda" #+(system-image image) + "--hda" #+(if (image? image) + (system-image image) + image) ;; Cause the service to be respawned if the guest ;; reboots (it can reboot for instance if it did not |