FWIW there is a notification when a volume is attached here:
https://github.com/openstack/nova/blob/03f8f5a08418080162a3d2f90658a597606e7c45/nova/compute/manager.py#L4689
And volume detach here:
https://github.com/openstack/nova/blob/03f8f5a08418080162a3d2f90658a597606e7c45/nova/compute/manager.py#L4829
But I guess the point of this bug is that the instance create and update notifications don't have BDM (attached volume) information in them.
FWIW there is a notification when a volume is attached here:
https:/ /github. com/openstack/ nova/blob/ 03f8f5a08418080 162a3d2f90658a5 97606e7c45/ nova/compute/ manager. py#L4689
And volume detach here:
https:/ /github. com/openstack/ nova/blob/ 03f8f5a08418080 162a3d2f90658a5 97606e7c45/ nova/compute/ manager. py#L4829
But I guess the point of this bug is that the instance create and update notifications don't have BDM (attached volume) information in them.