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[Feodor Tersin <ftersin@xxxxxxxxxxx>]

Public bug reported:

Since that https://review.openstack.org/#/c/189632/ is merged, root
device name of volume backed instances is /dev/vdb with libvirt.

Steps to reproduce against DevStack:
1 Boot an instance:
nova --block-device source=image,dest=volume,size=1,bootindex=0,id=<xxx> --flavor m1.nano inst
where xxx is an image id.

2 Look at the device name:
openstack volume list

Expected value: /dev/vda
Actual value: /dev/vdb

Inside guest OS the volume is displayed as /dev/vda.

** Affects: nova
     Importance: Undecided
     Assignee: Feodor Tersin (ftersin)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1481164

Title:
  Invalid root device name for volume-backed instances with libvirt

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  Since that https://review.openstack.org/#/c/189632/ is merged, root
  device name of volume backed instances is /dev/vdb with libvirt.

  Steps to reproduce against DevStack:
  1 Boot an instance:
  nova --block-device source=image,dest=volume,size=1,bootindex=0,id=<xxx> --flavor m1.nano inst
  where xxx is an image id.

  2 Look at the device name:
  openstack volume list

  Expected value: /dev/vda
  Actual value: /dev/vdb

  Inside guest OS the volume is displayed as /dev/vda.

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