Open Stack

Hi Vincent,

Just to complement what Mike and Gorka said, Cinder NFS drivers does not
provision FS services. It 'consumes' a FS export, and provisions block
storage.
To be more detailed, the Cinder NFS backend, mount a remote share from a
NFS server, and create/stores the cinder volumes as files inside this
exports on the volume node. In a scenario that you have Manila and Cinder,
if Manila is using the generic driver and Cinder the NFS backend, before
create a share, Manila will create a volume in Cinder, which will store
that in the NFS share as a file.

Erlon



On Tue, Sep 29, 2015 at 9:10 AM, Gorka Eguileor <geguileo at redhat.com> wrote:

> On 29/09, Duncan Thomas wrote:
> > Cinder provides a block storage abstraction to a vm. Manila provides a
> > filesystem abstraction. The two are very different, and complementary. I
> > see no reason why the nfs related cinder drivers should be removed based
> on
> > the existence or maturity of manila - manila is not going to suddenly
> start
> > providing block storage to a vm.
> > On 29 Sep 2015 06:56, "Sheng Bo Hou" <sbhou at cn.ibm.com> wrote:
> >
> > > Hi folks,
> > >
> > > I have a question about the file services in OpenStack.
> > >
> > > As you know there is a generic NFS driver in Cinder and other file
> system
> > > drivers inherit it, while the project Manila is determined to provide
> the
> > > file system service.
> > >
> > > Will NFS stay with Cinder as the reference implementation for the
> coming
> > > release or releases? Are all the file system drivers going to move to
> > > Manila?
> > > What is relation between Manila as FSaaS and NFS in Cinder?
> > > Any ideas?
> > >
> > > Thank you.
> > >
> > > Best wishes,
> > > Vincent Hou (侯胜博)
> > >
> > > Staff Software Engineer, Open Standards and Open Source Team, Emerging
> > > Technology Institute, IBM China Software Development Lab
> > >
> > > Tel: 86-10-82450778 Fax: 86-10-82453660
> > > Notes ID: Sheng Bo Hou/China/IBM at IBMCN    E-mail: sbhou at cn.ibm.com
> > > Address:3F Ring, Building 28 Zhongguancun Software Park, 8 Dongbeiwang
> > > West Road, Haidian District, Beijing, P.R.C.100193
> > > 地址:北京市海淀区东北旺西路8号中关村软件园28号楼环宇大厦3层 邮编：100193
> > >
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>
> I agree with Duncan,
>
> There is a clear distinction between the projects' objectives:
> - Cinder provides the canonical storage provisioning control plane in
>   OpenStack for block storage as well as delivering a persistence model
>   for instance storage.
> - Manila is a File Share Service, in a similar manner, provides
>   coordinated access to shared or distributed file systems.
>
> So I wouldn't move out our NFS drivers.
>
> As the relation between those is that while they both use the same
> storage type they expose it completely different.
>
> Cheers,
> Gorka.
>
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