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 <vishvana...@gmail.com>: > > On May 14, 2014, at 12:14 AM, Zhangleiqiang (Trump) < > zhangleiqi...@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@lists.openstack.org > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > -- ------------------- Best Regards Trump.Zhang
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