[Openstack] Lost copy-on-write feature when create volume from image with using Ceph RBD

Hi, Guys Recently I'm testing the new version of OpenStack Grizzly. I'm using Ceph RBD as the backend storage both for Glance and Cinder. In the old version of Folsom, when set the parameter ‘show_image_direct_url=True’ in the config file glance-api.conf, the process of create volume from image

[Openstack] How to hot-plug network interface for a running instance

Hi, All I'm testing hot-plug network interface, I can successfully hot-add an interface to a running instance by using command 'nova interface-attach --net-id xx ', but the network of the interface must has been specified to instance when you create it. For a new network, I can't attach it to

[Openstack] Floating IP is wasting IP resources

Recently I'm test floating IP on version Grizzly, I found the mechanism of floating IP is a little of wasting public IP addresses. In some circumstance, like public cloud environment. there is only one user in one project (tenant). If the user want to using floating IP, he has to create an router