recovery of virtual machines on KVM

[Ahmed Kamal]

On 02/09/2011 08:39 PM, Tapas Mishra wrote:
> I  am having a virtualization setup via KVM on a Ubuntu 10.04 64 bit server.
>
> A recent dbus update cause a crash of my Host OS.It was a post install
> script of dbus which ultimately brought everything down.
>
> Now I have to basically format the host OS.My cause of concern are the
> virtual machines which were running on it when the environment was
> stable.Which were in separate LVM partitions.
>
> Some thing like
>
> /dev/virtualization/vm1
> /dev/virtualization/vm2
> /dev/virtualization/vm3
> /dev/virtualization/vm4
> If some one has experienced recovery of this sort in past let me know
> what did they do to get things back. All my Virtual Machines were on
> separate partition and in same VolumeGroup this volume group was on
> Host OS. Will formatting of HOST os clear the Virtual Machines also in
> my situation or just be re installing the host and importing the
> Virtual Machines via a tool such as virt-manager I will be able to get
> them back.

It depends, if the VG is stored on the same disk and you reinstall you 
might indeed destroy the VMs. Please don't proceed until you're sure of 
what you're doing