Bug 1287784 – When attaching a FC device, nova-compute will assign /dev/sd* even though there are 4 paths and a DM device

Bug 1287784 - When attaching a FC device, nova-compute will assign /dev/sd* even though there are 4 paths and a DM device [NEEDINFO]

Summary:	When attaching a FC device, nova-compute will assign /dev/sd* even though the...

Status:	CLOSED DUPLICATE of bug 1273473

Aliases:	None

Product:	Red Hat OpenStack
Classification:	Red Hat
Component:	openstack-nova (Show other bugs)
Sub Component:
Version:	7.0 (Kilo)
Hardware:	Unspecified Unspecified

Priority	unspecified Severity high
Target Milestone:	---
Target Release:	7.0 (Kilo)
Assigned To:	Lee Yarwood
QA Contact:	nlevinki
Docs Contact:

URL:
Whiteboard:
Keywords:	ZStream

Depends On:
Blocks:
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Reported:	2015-12-02 11:42 EST by David Hill
Modified:	2018-02-08 06:04 EST (History)
CC List:	15 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-12-22 05:01:09 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Flags:	lyarwood: needinfo? (sputhenp)

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Description David Hill 2015-12-02 11:42:37 EST

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:

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