Bug 1033178

Summary: [RFE][cinder]: a shared volume can be accessed by many instances
Product: Red Hat OpenStack Reporter: Stephen Gordon <sgordon>
Component: openstack-cinderAssignee: RHOS Maint <rhos-maint>
Status: CLOSED DUPLICATE QA Contact: Haim <hateya>
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: eharney, hateya, markmc, yeylon
Target Milestone: ---Keywords: FutureFeature
Target Release: 5.0 (RHEL 7)   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: upstream_milestone_none upstream_status_not-started
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of:
: 1033185 (view as bug list) Environment:
Last Closed: 2013-11-27 20:35:48 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Stephen Gordon 2013-11-21 16:17:56 UTC 
Cloned from launchpad blueprint https://blueprints.launchpad.net/cinder/+spec/shared-volume.

Description:

Provide the ability to attach a single volume to multiple instances simultaneously.  In order to do this R/W there are a number of issues involved with respect to data corruption etc.  As a first pass it would be very useful to introduce a Read Only option that could be specified during attach and used to allow simultaneous attach to multiple instances.

Most of this will require work in Nova/Compute but there will need to be some comprehension added to Cinder, and perhaps the ability to mark a volume as Read Only might be useful as well.

This R/O volumes could be especially useful for things like Images and even D2D backups.  

There's also a need for FC environments to multi-attach in general.

Specification URL (additional information):

None
Comment 2 Stephen Gordon 2013-11-27 20:35:48 UTC 

*** This bug has been marked as a duplicate of bug 1033180 ***