openstack/cinder
Code Issues Proposed changes

Doc note warning about retyping an unencrypted/encrypted volume.

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As we discussed at Victoria PTG[1] it would be nice to have a note
warning users to don’t try this.

[1] https://wiki.openstack.org/wiki/CinderVictoriaPTGSummary#Sizing_encrypted_volumes

Partial-Bug: #1687880
Change-Id: Ifa896c5f7336d3ce2a382ded9dcb4b3d595220db
This commit is contained in:
Sofia Enriquez 2020-06-02 19:31:34 +00:00
parent 307fccea4c
commit 662b8210aa
1 changed files with 7 additions and 0 deletions
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7
doc/source/contributor/migration.rst
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@ -45,6 +45,13 @@ regardless if they are located on the same c-vol node or not.
Scenario 2: Migration between two back-ends with different volume types,
regardless if the back-ends are located on the same c-vol node or not.
.. note::
Retyping an unencrypted volume to the same size encrypted volume will
most likely fail. Even though the volume is the same size as the source
volume, the encrypted volume needs to store additional encryption
information overhead. This results in the new volume not being large
enough to hold all data.
Please do not try this in older releases.
How to do volume migration via CLI
----------------------------------