Support mounting virtiofs Filesystems with storage / filesystems

[eknoes]

Feature Request

I'd like to request support for mounting virtiofs filesystems. This is, as far as I understand, not possible with the current ignition files. It could look like this:

storage:
  filesystems:
    - device: coreos-virtiofs-example
      format: virtiofs
      path: /mnt

This currently does not work, because device is expected to be an absolute path and for format, virtiofs is not accepted. CoreOS is able to mount a virtiofs manually, I just have to execute mount -t virtiofs <device-name> as root.

[alicefr]

@eknoes the feature makes sense, but can you for now define a systemd service which mounts the virtiofs filesystem as workaround?