Bug 1287784 - When attaching a FC device, nova-compute will assign /dev/sd* even though there are 4 paths and a DM device [NEEDINFO]
When attaching a FC device, nova-compute will assign /dev/sd* even though the...
Status: CLOSED DUPLICATE of bug 1273473
Product: Red Hat OpenStack
Classification: Red Hat
Component: openstack-nova (Show other bugs)
7.0 (Kilo)
Unspecified Unspecified
unspecified Severity high
: ---
: 7.0 (Kilo)
Assigned To: Lee Yarwood
: ZStream
Depends On:
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Reported: 2015-12-02 11:42 EST by David Hill
Modified: 2018-02-08 06:04 EST (History)
15 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2015-12-22 05:01:09 EST
Type: Bug
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
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:

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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