Bug 1887471

Summary:	[RFE][OSP 18] virtio-fs support for Manila
Product:	Red Hat OpenStack	Reporter:	Tom Barron <tbarron>
Component:	openstack-nova	Assignee:	René Ribaud <rribaud>
Status:	CLOSED DEFERRED	QA Contact:	OSP DFG:Compute <osp-dfg-compute>
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	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.