I switched to Nova API, and it is working now.  

Thanks a lot.
John
 


    On Monday, December 7, 2015 8:26 PM, hao wang <sxmatch1...@gmail.com> wrote:
 

 Hi, Laohu
You shouldn't use cinder attach API to attach a volume to an instance.
Cinder attach API worked with Nova attach API, so you should call Nova
attach API that will attach volume really.

Attach volume is a complex process, it start from Nova side,  Nova
will interact with Cinder several times via calling different Cinder
APIs.

BR
WangHao

2015-12-07 21:41 GMT+08:00 Laohu <boston01a2...@yahoo.com>:
> I called cinderclient.volumes.attach(...)  to attach a block volume to an
> instance, the volume is in  'In-Use' status and attached to the volume.
> However, when I got on Openstack dashboard and clicked on the instance, i
> could not find the volume in the 'Volumes Attached' section.
>
> I use cinder 2.0 client.
>
> Thanks for help!
> John
>
>
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