Openstack - Manually edit VM
Find the host the VM is running on and the instance ID(Use console view to get instance ID)
1cp /etc/libvirt/qemu/instance-0000030a.xml .
edit instance-0000030a.xml
to be what you need it to be
While the VM is running (Warning, will crash the VM)
1virsh destroy instance-0000030a
2virsh undefine instance-0000030a
3virsh define instance-0000030a.xml
4virsh start instance-0000030a