OpenStack cinder has the ability to do multiple backends, which is quite useful if you are running out of space on one type of storage and you need to put in additional/replacement storage.
It is relatively simple to migrate to multiple backends, just enclose your
current backend under a section (e.g.
[netapp]) and add in the
netapp_login = <login> netapp_password = <password> volume_driver = cinder.volume.drivers.netapp.common.NetAppDriver ...
enabled_backends = netapp [netapp] netapp_login = <login> netapp_password = <password> volume_driver = cinder.volume.drivers.netapp.common.NetAppDriver ...
One important thing to note is that with multiple backends, the
in cinder DB will have the backend appended. You need to run the
following on your cinder controller:
cinder-manage volume update_host --currenthost cinder-qh2-test --newhost 'cinder-qh2-test@netapp'
This updates the
host colume of existing entries so that existing volumes can
still be managed under the new format.