Open Stack

Thanks for your reply and advice. Manual update of the database can achieve
it, however, I don't think it is reasonable especially in a production
environment.


2014-05-14 23:43 GMT+08:00 Vishvananda Ishaya <vishvananda at gmail.com>:

>
> On May 14, 2014, at 12:14 AM, Zhangleiqiang (Trump) <
> zhangleiqiang at huawei.com> wrote:
>
> > Hi, all:
> >       I meet a requirement in my OpenStack environment which initially
> uses one LVMISCSI backend. Along with the usage, the storage is
> insufficient, so I want to add a NFS backend to the exists Cinder.
> >
> >       There is only a single Cinder-volume in environment, so I need to
> configure the Cinder to use "multi-backend", which means the initial
> LVMISCSI storage and the new added NFS storage are both used as the
> backend. However, the existing volume on initial LVMISCSI backend will not
> be handled normally after using multi-backend, because the "host" of the
> exists volume will be thought down.
> >
> >       I know that the "migrate" and "retype" APIs aim to handle the
> "backend capacity expansion", however, each of them can't used for this
> situation.
> >
> >       I think the use case above is common in production environment. Is
> there some existing method can achieve it ? Currently, I manually updated
> the "host" value of the existing volumes in database, and the existing
> volumes can then be handled normally.
>
> While the above use case may be common, you are explicitly changing the
> config of the system, and requiring a manual update of the database in this
> case seems reasonable to me.
>
> Vish
>
> >
> >       Thanks.
> >
> > ----------
> > zhangleiqiang (Trump)
> >
> > Best Regards
> >
> >
> >
> > _______________________________________________
> > OpenStack-dev mailing list
> > OpenStack-dev at lists.openstack.org
> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
>
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>
>


-- 
-------------------
Best Regards

Trump.Zhang
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