[openstack-dev] [nova]Discussion of the inconsistency between api and backend compute driver limitations.
guohliu at linux.vnet.ibm.com
Mon Jul 15 02:13:08 UTC 2013
On 07/08/2013 09:56 PM, Joe Gordon wrote:
> On Jul 3, 2013 12:44 PM, "guohliu" <guohliu at linux.vnet.ibm.com
> <mailto:guohliu at linux.vnet.ibm.com>> wrote:
> > Hello,
> > As we know, nova have different compute drivers with different
> limitations, you can see in this link,
> > https://wiki.openstack.org/wiki/HypervisorSupportMatrix
> > but the api doesn't reflect that, which means when the user performs
> some operations via APIs, user can not get well defined message of the
> limitations, most likely just get error status. I am thinking this
> problem for a while and feeling a limitation filter might be needed in
> current api design to filter those limitations and directly return
> well defined message, I apologize if this problem has been already
> discussed but I missed it, looking forward to your comments.
> Can you give an example? Why not just update the current error
> messages to be well defined?
Well, lot's of example, like resize from big flavor to small flavor,
currently different driver has different behaviour, hyper-v will check
and just throw a exception, libvert powervm etc, after check just use
the big flavor to perform resize.
> > Best Regards
> > guohliu
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