On 08/08, Nguyễn Hữu Khôi wrote: > Hello guys. > I have 2 AZ and 1 volume backend on each AZ. > > My goal is when 1 volume was created from the AZ then user cannot change > it to another volume type on a different AZ. > > Thank you. > > Nguyen Huu Khoi Hi, If you only have 2 volume types, then you can just disable the retype operation using policies and they won't be able to use the operation to move from one AZ to the other. I believe there is no other way to limit that. Cheers, Gorka. [1]: https://docs.openstack.org/cinder/queens/configuration/block-storage/policy.html#