Re: [Xen-devel] adding file vbd to running domain

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

The virtual blkdev driver can only talk to block devices. If there was
some way of 'mounting' a file as a block device then you could connect
your guest to that block-device node, but I don't think there's any
way of doing such a mount.

Probably the most flexible way of managing guest OS disc volumes is to
use LVM2. Then you can create fleible logical volumes on top of one or
more real disc partitions (physical volumes) and thereby get the
manageability you are looking for. 

We currently have no integration of our toolset with LVM2, but there's
no reason for you not to set up some logical volumes, and then specify
those in your guest-OS configuration files. Better integration is
perhaps something we will investigate in future.   

 -- Keir


> Using the current unstable version,
> 
> is it possible to add a File-backed virtual block device to a running 
> domain?
> I've setup a partition with several files on them, as described in the
> manual, which i want to mount in running domains on a as-needed base.
> 
> Regards, Robin Kluit
> 
> 
> 
> 
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