Create VM with two datastore.

[rdziwinski]

Hello :) Description I think it's would be nice to add possibility to have one vm with disk in two datastores.

Use case For example: One VM with two disk. One with local fast ssd for OS and DB and separate disk on Ceph with media, static and backups.

Interface Changes I think Sunstone is ready for that.

Additional Context Some days ago i reported problem with it at OpenNebula Community forum: https://forum.opennebula.io/t/unable-to-add-disk-from-other-tm-mad/10949

Sorin Paduraru also wrote about that: https://forum.opennebula.io/t/multi-tiered-local-storage-for-vms/10950

• This should also include the ability to migrate individual disks to another datastore

Progress Status

• [ ] Code committed
• [ ] Testing - QA
• [ ] Documentation (Release notes - resolved issues, compatibility, known issues)