Add documentation about how to support changing backend from ephemeral storage to RDB storage

Bug #1841522 reported by Wouter van Bommel
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OpenStack Nova Compute Charm
Triaged
Low
Unassigned

Bug Description

With the charm it is possible to change the storage backend from empheral to rdb. This works will and machine's created after the change, can also be live migrated.
Machine's created before the change however will go to a failed state, as their storage cannot be found on the rdb backend.

So changing this option should come with some guidance on how to handle that.

tags: added: canonical-bootstack
Changed in charm-nova-compute:
status: New → Triaged
importance: Undecided → Low
summary: - support changing backend from ephemeral storage to RDB storage
+ Add documentation about how to support changing backend from ephemeral
+ storage to RDB storage
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