Qemu-KVM/libvirt - console of an Instance

Hello,

I've Qemu-KVM/libvirt VMs running on Ubuntu 12.04 in Openstack Havana environment. I know a way using "virsh vncdisplay" to access the console of an instance. But it won't allow interactive access when you need to provide root password to run fsck.

Other way I know is to setup "pty" using "virsh edit <vm>". But when I restart the VM, it gets overwritten.

Does anyone know a way around to get console access to be able to run fsck?

The guestmount method is not what I want to do for this purpose. I want full fledged console access.

Thanks