[openstack-dev] [nova][cinder] Refactor ISCSIDriver to support other iSCSI transports besides TCP

John Griffith john.griffith at solidfire.com
Mon Jun 16 16:36:56 UTC 2014


On Thu, Mar 27, 2014 at 10:45 AM, Shlomi Sasson <shlomis at mellanox.com>
wrote:

>  Of course I’m aware of that.. I’m the one who pushed it there in the
> first place J
>
> But it was not the best way to handle this.. I think that the right/better
> approach is as suggested.
>
>
>
> I’m planning to remove the existing ISERDriver code, this will eliminate
> significant code and class duplication, and will work with all the iSCSI
> vendors who supports both tcp and rdma without the need to modify their
> plug-in drivers.
>
>
>
>
>
> *From:* John Griffith [mailto:john.griffith at solidfire.com]
> *Sent:* Wednesday, March 26, 2014 22:47
>
> *To:* OpenStack Development Mailing List (not for usage questions)
> *Subject:* Re: [openstack-dev] [nova][cinder] Refactor ISCSIDriver to
> support other iSCSI transports besides TCP
>
>
>
>
>
>
>
> On Wed, Mar 26, 2014 at 12:18 PM, Eric Harney <eharney at redhat.com> wrote:
>
> On 03/25/2014 11:07 AM, Shlomi Sasson wrote:
>
> > I am not sure what will be the right approach to handle this, I already
> have the code, should I open a bug or blueprint to track this issue?
> >
> > Best Regards,
> > Shlomi
> >
> >
>
> A blueprint around this would be appreciated.  I have had similar
> thoughts around this myself, that these should be options for the LVM
> iSCSI driver rather than different drivers.
>
> These options also mirror how we can choose between tgt/iet/lio in the
> LVM driver today.  I've been assuming that RDMA support will be added to
> the LIO driver there at some point, and this seems like a nice way to
> enable that.
>
>
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>
>
>
> I'm open to improving this, but I am curious you know there's an ISER
> subclass in iscsi for Cinder currently right?
>
> http://goo.gl/kQJoDO
>
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>
> ​Hi Shlomis,

I started working on something similar to this that decouples data-path and
control-plan for the backend devices and threw some ideas out in Cinder
channel this morning.  Luckily some folks remembered this post and pointed
me to it :)

Wondering did you ever post anything here?  Would you be interested in
collaborating on this and sharing ideas?​  I'm planning to have a prototype
ready to share later this week, but it sounds like you may already have a
lot of this done so it would be cool if we worked together on it.

Thanks,
John
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