Open Stack

First  of all thanks for your help

This is a private cloud which is right now using gluster as backend.
Most of the images are private (i.e. usable only within the project),
uploaded by the end-users.
Most of these images were saved in qcow2 format ...


The ceph cluster is still being benchmarked. I am testing the integration
between ceph and openstack (and studying the migration) on a small
openstack testbed.

 Having the glance service running during the migration is not strictly
needed, i.e. we can plan a scheduled downtime of the service

Thanks again, Massimo


2017-03-28 5:24 GMT+02:00 Fei Long Wang <feilong at catalyst.net.nz>:

> Hi Massimo,
>
> Though I don't have experience on the migration, but as the glance RBD
> driver maintainer and image service maintainer of our public cloud
> (Catalyst Cloud based in NZ), I'm happy to provide some information. Before
> I talk more, would you mind sharing some information of your environment?
>
> 1. Are you using CoW of Ceph?
>
> 2. Are you using multi locations?
>
> show_multiple_locations=True
>
> 3. Are you expecting to migrate all the images in a maintenance time
> window or you want to keep the glance service running for end user during
> the migration?
>
> 4. Is it a public cloud?
>
>
> On 25/03/17 04:55, Massimo Sgaravatto wrote:
>
> Hi
>
> In our Mitaka cloud we are currently using Gluster as storage backend for
> Glance and Cinder.
> We are now starting the migration to ceph: the idea is then to dismiss
> gluster when we have done.
>
> I have a question concerning Glance.
>
> I have understood (or at least I hope so) how to add ceph as store backend
> for Glance so that new images will use ceph while the previously created
> ones on the file backend will be still usable.
>
> My question is how I can migrate the images from the file backend to ceph
> when I decide to dismiss the gluster based storage.
>
> The only documentation I found is this one:
>
> https://dmsimard.com/2015/07/18/migrating-glance-images-to-
> a-different-backend/
>
>
> Could you please confirm that there aren't other better (simpler)
> approaches for such image migration ?
>
> Thanks, Massimo
>
>
> _______________________________________________
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>
>
> --
> Cheers & Best regards,
> Feilong Wang (王飞龙)
> --------------------------------------------------------------------------
> Senior Cloud Software Engineer
> Tel: +64-48032246 <+64%204-803%202246>
> Email: flwang at catalyst.net.nz
> Catalyst IT Limited
> Level 6, Catalyst House, 150 Willis Street, Wellington
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