I have a working Openstack Icehouse install on a single server, I added two new flavors, 1Gmem, 1vcpu, 5G disk and another flavor 1G mem, 2vcpu and 5G disk.

I create an instance using a volume to store the disk. When I try to change the instance from a 1cpu flavor to a 2 cpu flavor the change does not occur even if I reboot. if I delete the instance and rebuild a new instance using the same volume but with the new flavour I get a dual cpu instance running (confirmed with cat /proc/cpuinfo inside the instance).

if I shutdown the instance, do a resize, no change occurs even though no errors are given.

is this a bug?