[nova] unshelve image_ref bugs
mriedemos at gmail.com
Fri Nov 22 17:15:46 UTC 2019
On 11/22/2019 8:05 AM, Alexandre Arents wrote:
> C) Change create_image()/imagebackend driver behavior,
> to create a flatten qcow2 file in case of unshelving.
> flattening disk may be a solution because there will be no more "orphan backing file".
> (Basicly doing like "flat" backend driver except we need to stay in qcow2 instead of RAW)
> -we keep orignal unshelve behavior/assumption
> -It means that in your infra configured in COW some instances will be in "qcow2 flat",
> Flat qcow2 instance works great (livemigration/resize..). Would all installation ok with that ?
> Ok it seems a little odd to ask COW driver to not do COW in some case. Alternatilevy we can
> force using flat driver if unshelving, but we need to change flat driver to support also qcow2.
> D) During spawn() if unshelving we convert "qcow2 disk with backing file" to a "flatten qcow2 disk",
> just after self._create_image().
> It looks more like a workaround than a long term solution as it need to convert something created before,
> that do not meet the need(better to do C).
Does this already fix your problem?
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