[Openstack-operators] [openstack-dev] Management of NAS (NFS/CIFS shares) in OpenStack

Steven Manos smanos at unimelb.edu.au
Thu Nov 22 03:42:55 UTC 2012

I'm in agreement with all of this as well… users just want storage, and it makes sense that something like Cinder should act as a layer through which these things happen.

My 2c.


Dr. Steven Manos
B. Sc (USyd) D. Phil (USyd)
Manager, Research Services|Information Technology Services | University of Melbourne
Room 304, Level 3, Doug McDonell Building (168), Parkville Campus, Victoria 3010 Australia
T + 61 3 9035 4017 | M + 61 402 827 324 | W its.unimelb.edu.au/research<http://its.unimelb.edu.au/research> | E smanos at unimelb.edu.au<mailto:smanos at unimelb.edu.au>

On 22/11/2012, at 12:04 PM, Joe Topjian <joe.topjian at cybera.ca<mailto:joe.topjian at cybera.ca>>

I don't have anything to add, I just wanted to publicly voice an agreement with what Blair and Michael have said.

As an operator, I too see storage as storage--whether it's block or network shares--and should all be in one project. I'll go a step further and think that it should all be grouped under the concept of a "volume". A volume is storage - if a user wants a volume, they click create, and then they can choose what type they want (whether block, network, or whatever else the operator has enabled).

IMO, please look at it from the user's point of view.

(cc'ing -operators as the other posts have gone there as well and I think the below reply is worthwhile for those members)

On Wed, Nov 21, 2012 at 5:31 PM, Michael Chapman <michael.chapman at anu.edu.au<mailto:michael.chapman at anu.edu.au>> wrote:
This is something we are extremely interested in, as we have existing large filesystems (cxfs and lustre) and getting at that data in a manageable and secure manner from an Openstack VM is currently a manual process of sub-folder exports to floating IPs. My understanding is that there are a number of research sites in similar situations.

Following ISI's talk at the summit, one option we looked at was VirtFS, but since that is KVM only and the security models available weren't going to give us good results, it didn't seem like the best option.

As to whether this belongs in Cinder or as a separate project, from an ops perspective I think block storage and network shares are both instances of granting individual VMs access to slices of storage resources, and as such belong under a single project. If the concern is that Cinder-core will require additional members that can support the additional protocols for reviews, I would suggest that this is no different to supporting iser or fibre-channel attached block storage, which would require a different set of expertise to the current iscsi approach, yet would certainly fall under the general category of block storage.

 - Michael Chapman

On Thu, Nov 22, 2012 at 2:52 AM, Swartzlander, Ben <Ben.Swartzlander at netapp.com<mailto:Ben.Swartzlander at netapp.com>> wrote:
NetApp is interested in providing a common way to provision and attach
NFS and CIFS shares to VMs in an OpenStack environment. We presented our
ideas at the OpenStack summit last month and we have submitted a patch
to Cinder that demonstrates one way to implement these features. We
believe that extensions to the Cinder API are the most logical and least
disruptive way to bring these features to OpenStack, but discussions at
the conference show there are differences of opinion on this topic.

I would like to invite anyone who is interested in NFS and CIFS in
OpenStack, or Cinder or NAS in general to take a look at our etherpad
and our code submission and provide feedback and suggestions.

Etherpad: https://etherpad.openstack.org/cinder-nas-extensions
Gerrit Submission: https://review.openstack.org/#/c/16054/

Our proposed patch does include substantial changes and we want to do
our best to ensure that we do it right the first time, so please reply
to me and/or this thread if you're interested and have good ideas,
opinions, or suggestions. We also welcome any code review comments on
the gerrit submission.

-Ben Swartzlander

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Michael Chapman
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Joe Topjian
Systems Administrator
Cybera Inc.


Cybera is a not-for-profit organization that works to spur and support innovation, for the economic benefit of Alberta, through the use of cyberinfrastructure.

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