[vbox-dev] [PROPOSAL] Userdata Interface

Ivo Smits Ivo at UFO-Net.nl
Thu Sep 15 07:12:22 GMT 2016

VirtualBox has Guest Properties, which I think are very similar to 
VMware's GuestVariables. You can use Guest Properties via the command 
line: https://forums.virtualbox.org/viewtopic.php?t=10823

Or via the COM API: 

On the guest side you'll probably need the VirtualBox Guest Additions 
including its kernel module to be able to access the properties.



Op 15-9-2016 om 4:19 schreef Alex Crawford:
> I've been kicking around the idea of adding another request type to
> VMMDev that exposes an opaque chunk of data provided by the user. This
> is intended to allow users to pass configuration data to guests which
> support reading from this interface.
> At CoreOS, we are working on a project called Ignition [1], which
> handles machine provisioning tasks (setting up filesystems, creating
> users, enabling services, etc.). In order to support VirtualBox, we need
> a way for users to pass their Ignition config to the CoreOS Linux guest
> (ideally via the hypervisor). We do this via GuestVariables on VMware
> and the firmware configuration device on QEMU. I couldn't find anything
> in VirtualBox which would allow us similar functionality.
> I'd like to add an extra request handler to expose just this piece of
> information. I had considered making a much more general mechanism,
> similar to GuestVariables, but I'd prefer to keep things simple and get
> the developers' feedback before I started work. What do you all think?
> -Alex
> [1]: https://coreos.com/ignition
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