[bug#28198] [PATCH 1/4] vm: Add disk-image-size to <virtual-machine>.

[ludo@gnu.org (Ludovic Courtès)]

Hi Chris,

Christopher Baines <mail@cbaines.net> skribis:

> * gnu/system/vm.scm (<virtual-machine>): Add
>   disk-image-size.
>   (port-forwardings->qemu-options): Use disk-image-size from
>   <virtual-machine>.

In which case is it useful?  Perhaps if you want to create lots of data
on the root file system in the MongoDB test?

Currently <virtual-machine> builds a shared-store VM (like ‘guix system
vm’) in which the root file system has a fixed size that’s usually good
enough.

> --- a/gnu/system/vm.scm
> +++ b/gnu/system/vm.scm
> @@ -653,6 +653,8 @@ it is mostly useful when FULL-BOOT?  is true."
>                      (default #f))
>    (memory-size      virtual-machine-memory-size   ;integer (MiB)
>                      (default 256))
> +  (disk-image-size  virtual-machine-disk-image-size   ;integer (bytes)
> +                    (default (* 70 (expt 2 20))))

I think we can use 'guess here as the default value (and we should do
the same in places where #:disk-image-size has an arbitrary default.)

Ludo’.