I have an OpenStack environment using a NetApp storage appliance. This environment (KVM, Ubuntu 12.04) was piloted with Essex and moved to Grizzly. The driver we're currently using in Grizzly is "cinder.volume.drivers.netapp.iscsi.NetAppISCSIDriver".
I'm beginning to plan a migration path to Icehouse. From speaking to Rob Esker in Atlanta as well as reading the OpenStack NetApp docs, this driver is deprecated. I was able to find the github repo for a working Havana version of the driver, but I'm not sure what to do about moving to Icehouse.
Does an Icehouse version of this driver exist? If not, what are my options? The options I can think of are:
1. Stay at Havana
2. Layover at Havana and migrate to a different backend.
If I choose the second option, how much user disruption would this cause? Would attached volumes be migrated and then immediately swapped out on the instance? Or does the user need to detach, an admin migrate, and then the user reattach?