How-To Migrate Volumes Using CLI
Problem
You want to migrate volumes from one Cinder pool to another pool.
Environment
- Platform9 Managed OpenStack - All Versions
- Cinder
Answer
There are two major scenarios for which volume migration is supported in Cinder:
- Migration between two back-ends with the same volume type, regardless if they are located on the same cinder-volume host or not.
Note: Currently, error handling for failed migration operations is under development in Cinder. If you would like the volume migration to finish without any interruption, please set –-lock-volume to True. If it is set to False, Openstack cannot predict what will happen, if other actions like attach, detach, extend, etc, are issued on the volume during the migration. It all depends on which stage the volume migration has reached and when the request for another action comes.
- Migration between two back-ends with different volume types, regardless if the back-ends are located on the same cinder-volume host or not. Here, the source volume type and destination volume type must be different and they must refer to different back-ends.
Additional Information
Please refer to the official document for more information.
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