This commit adds a new VirtualBox provider helper method to return a
list of storage controllers so Vagrant can find a storage controller
with the desired characteristics (type IDE or SATA).
This still needs to get wired up to the disk cleanup method.
This builds on the existing disk functionality, and adds some special
IDE controller-related flavor.
Considerations for IDE controllers:
- Primary/secondary attachments, so that each port can have two devices
attached
- Adding the ability to address a specific controller name for disk
attachment
This also prevents a user from attaching multiple instances of the same
ISO file, because VirtualBox will assign each of these the same UUID
which makes disconnection difficult. However, if multiple copies of the
ISO are attached to different devices, removing the DVD config will
cause the duplicate devices to be removed.
We may want to consider additional work to make the storage controllers
truly generic.
This commit adds some recovery if Vagrant fails to reattach or clone a
vmdk disk that needs to be resized. It first moves the original disk
(after cloning) to a backup file. If something fails, it will reattach
the original disk to the guest and continue to raise the exception.
