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Hi Clinton,
  I think there are two main parts that are needed to automatically mount Manila shares.  One is the share discovery model, and the other is enabling the virtual machine to mount the share.  I think the only benefit to using zeroconf would be as a standard way to broadcast availability of a network share regardless of protocol.  Manila could broadcast the availability of a share by using a name like _manila_nfs, _manila_cifs, _manila_gluster, etc.  Although, even with zeroconf, the virtual machine still requires an agent to be able to attach the share for use.  I think the real benefit of using zeroconf is its simplicity.

There could still be other methods we can investigate.  For example (don't kill me for this ;-)), have a Manila YP NIS service for NFS shares?

- Luis



 
----- Original Message -----
From: "Clinton Knight" <Clinton.Knight at netapp.com>
To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org>
Sent: Wednesday, April 22, 2015 3:29:50 PM
Subject: [openstack-dev] [Manila] Mount automation using Zeroconf

Hello, Manila-philes. 

Back in Paris we started talking about Manila mount automation, whereby file shares could be automatically mounted on clients, and this will likely be a topic in Vancouver. So in order to have an informed discussion at the summit, I'd like to explore a few things beforehand. 

Besides brute force approaches like SSH or PsExec, one of the community suggestions was to use Zeroconf (aka Bonjour)[1]. Zeroconf sounds attractive on the surface, but it seems to have a number of limitations: 

* No standard way to specify local mount point 
* Additional setup required to work beyond the 'local' domain 
* Custom software needed on clients to mount advertised shares 
* Same issues with network connectivity as any other mount automation solution 

Does anyone have a clearer idea how Zeroconf might satisfy the need for Manila mount automation? 

Thanks, 
Clinton Knight 
Manila core team 

[1] http://en.wikipedia.org/wiki/Zero-configuration_networking 


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