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Bug 1287784

Summary: When attaching a FC device, nova-compute will assign /dev/sd* even though there are 4 paths and a DM device
Product: Red Hat OpenStack Reporter: David Hill <dhill>
Component: openstack-novaAssignee: Lee Yarwood <lyarwood>
Status: CLOSED DUPLICATE QA Contact: nlevinki <nlevinki>
Severity: high Docs Contact:
Priority: unspecified    
Version: 7.0 (Kilo)CC: berrange, dasmith, dhill, eglynn, kchamart, lyarwood, ndipanov, pbrady, sbauza, sferdjao, sgordon, sputhenp, vromanso, yeylon
Target Milestone: ---Keywords: ZStream
Target Release: 7.0 (Kilo)   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-12-22 10:01:09 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:
Embargoed:

Description David Hill 2015-12-02 16:42:37 UTC 
Description of problem:
When attaching a FC device, nova-compute will assign only one /dev/sd* device even though there are 4 paths (or more) and a DM-* device .  Shouldn't nova-compute leverage using a dm-* device instead of one of the underlying device ?  If that path fails, then the VM will lose the volume as if it was using dm-* instead, it would simply failover one of the 3 remaining paths.  When the volume is detached, it's only deleting one of the device instead of all device.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Create volume
2. Attach volume
3. Detach volume

Actual results:
Only one device is used/delete

Expected results:
The DM device is used/ only one device is deleted instead of 5

Additional info:
Comment 9 Red Hat Bugzilla 2023-09-14 03:14:14 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days