Re: I/O redirection Guest VM

[Fam Zheng <famz@redhat.com>]

On Fri, 03/14 02:00, Shivaramakrishnan Vaidyanathan wrote:
> Hello Fam,
> Thanks a lot  to your reply.
> I think I needed to bit more clear in my explanation.
> Here is my requirement:
> At first,I have a guest vm with its virtual disk performing no storage
> intrusion detection  running on top of kvm hypervisor. Then later I create
> this new VM app that performs the storage intrusion detection functionality
> again running on top of kvm hypervisor.I run nfs share inside this vm. Once
> I do this,I need the I/O's that is happening on guest vm to undergo the
> intrusion detection functionality before writes are performed on the disks.
> 
> 
> How could I point the image to the NFS share if the guest vm prior didn't
> had this functionality?
> And If I do the functionality now,Only NFS-shared partitions could be
> intercepted.What about the other partition writes occurring at the guest vm?
> 

Sounds like you need to change the backend of VM on flight to you NFS share.
But I don't think it's supported for now. (Assuming you use QEMU as device
virtualizer).

Fam