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Bug 1887471

Summary: [RFE][OSP 18] virtio-fs support for Manila
Product: Red Hat OpenStack Reporter: Tom Barron <tbarron>
Component: openstack-novaAssignee: René Ribaud <rribaud>
Status: CLOSED DEFERRED QA Contact: OSP DFG:Compute <osp-dfg-compute>
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: alifshit, bdobreli, dasmith, dgilbert, egallen, eglynn, gcharot, gmaglione, gouthamr, hreitz, jhakimra, jtomko, kchamart, kkiwi, kwolf, sbauza, sgordon, shtiwari, smooney, stephenfin, vgoyal, vromanso
Target Milestone: ---Keywords: FutureFeature, Patch, Triaged
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-10-13 18:54:35 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version: Zed
Embargoed:
Bug Depends On: 1897593, 1897613, 1897708, 1897710    
Bug Blocks: 1834425    

Description Tom Barron 2020-10-12 14:49:13 UTC 
Description of problem: 

virtio-fs feature allows to share a file system between hypervisor and guest. It has been recently released for RHEL8.2:
 - https://bugzilla.redhat.com/show_bug.cgi?id=1694164


In the context of CephFS and Manila, virtio-fs would allow to run the ceph client in the hypervisor to provide isolation between storage backend and tenant and later share the fs to the guest through qemu.

There was a previous RFE (for virtio-vsock) that got closed once virtio-fs was released, however the piece of code for Manila does not seem to be covered by the current code:
 - https://bugzilla.redhat.com/show_bug.cgi?id=1363787


Manila RFE 1834425 has been created but actual work to provide libvirt XML for virtio-fs to guests, and likely the work to stage mounts of CephFS shares to compute nodes so they can be shared with guest VMs using virtio-fs, would be in Nova.

 - https://bugzilla.redhat.com/show_bug.cgi?id=1834425
Comment 8 Klaus Heinrich Kiwi 2022-08-15 17:54:36 UTC 
I was in the process of cleaning up BZs in our backlog, and was about to CLOSE WONTFIX the libvirt dependent Bug 1897613 when I noted this RFE. In fact the low-level RFE for live-migration support was CLOSED WONTFIX a while ago: Bug 1897593

The live-migration support for virtio-fs is non-trivial and we don't have the resources readily available to work on it. So I wanted to have a discussion of the importance of this, or whether we should extend the WONTFIX here too.

Thanks,

 -Klaus
Comment 11 smooney 2022-10-13 18:54:35 UTC 
This feature request has been deferred to a future OSP release and migrated to our new Jira backlog for consideration in a future product release. 
Starting with the Antelope upstream release, DFG:Compute is tracking its feature backlog in Jira. This feature request has been migrated to DFG:Compute’s new Jira backlog.
The Jira tracker for this feature request can be found here https://issues.redhat.com/browse/OSP-19403.
At the time of this writing, only Red Hat associates have access to the Jira tracker.