Re: [openstack-dev] Ceph multiattach support

2018-05-31 Thread Tom Barron

On 31/05/18 10:00 +0800, fengyd wrote:

Hi,

I'm using Ceph for cinder backend.
Do you have any plan to support multiattach for Ceph backend?

Thanks

Yafeng


Yafeng,

Would you describe your use case for cinder multi-attach with ceph 
backend?


I'd like to understand better whether manila (file share 
infrastructure as a service) with  CephFS native or CephFS-NFS 
backends would (as Erik McCormick also suggested) meet your needs.


-- Tom Barron


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Re: [openstack-dev] Ceph multiattach support

2018-05-30 Thread Erik McCormick
The lack of ceph support is a ceph problem rather than a Cinder problem.
There are issues with replication and multi-attached RBD volumes asd I
understand it. The ceph folks are aware but have other priorities
presently. I encourage making your interest known to them.

In the meantime,  check out Manilla with cephfs if you are running modern
versions of both Ceph and Openstack.

-Erik



On Wed, May 30, 2018, 10:02 PM fengyd  wrote:

> Hi,
>
> I'm using Ceph for cinder backend.
> Do you have any plan to support multiattach for Ceph backend?
>
> Thanks
>
> Yafeng
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Re: [openstack-dev] Ceph multiattach support

2018-05-30 Thread Alan Bishop
On Wed, May 30, 2018 at 10:00 PM, fengyd  wrote:
> Hi,
>
> I'm using Ceph for cinder backend.
> Do you have any plan to support multiattach for Ceph backend?

A lot of people have expressed an interest in this, so I'm sure
multi-attach with Ceph will eventually be supported. However, it will
require a fair amount of investigation to fully understand what is
needed for the feature to work correctly. The situation is summarized
in a comment in the Cinder code [1].

[1] 
https://github.com/openstack/cinder/blob/master/cinder/volume/drivers/rbd.py#L486

Alan

> Thanks
>
> Yafeng
>
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[openstack-dev] Ceph multiattach support

2018-05-30 Thread fengyd
 Hi,

I'm using Ceph for cinder backend.
Do you have any plan to support multiattach for Ceph backend?

Thanks

Yafeng
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