Function get_pool should be forced to implement the backend driver

[YaoZheng_ZTE]

After support the BP "https://blueprints.launchpad.net/cinder/+spec/pool-aware-cinder-scheduler", The volume's host has been changed as the format: host = 'HostA@BackendB#PoolC'. so , for legacy volume created before pool is introduced, Process need to call the backend driver interface get_pool query volume where the pool name and modify the volume's host as the new format. So, the function get_pool should be forced to implement the backend driver. If the backend driver did not implement this interface, the legacy volume cannot perform migration and other operations.

[Sheel Rana (ranasheel2000)]

Dear YaoZheng_ZTE (zheng-yao1) ,

I think this bug is somehow similar to https://bugs.launchpad.net/cinder/+bug/1574503
If this is same as https://bugs.launchpad.net/cinder/+bug/1574503, we can mark this duplicate.
Thank you!!

[Jay Bryant (jsbryant)]

There has not been a response to the duplicate question. I am going to mark it as a duplicate.