Ubuntu
libvirt package

Unable to attach an EBS volume

  1. Maverick (10.10)
  2. Bug #750565
Bug #750565 reported by Carlos Perelló Marín
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
libvirt (Ubuntu)
Fix Released
High
Serge Hallyn
Maverick
Invalid
High
Serge Hallyn

Bug Description

With Maverick's UEC / Euclayptus, there is no way to mount EBS volumes because libvirt gives the error:

sdh uses scsi:1, rather than scsi:0.

The error and the patch applied upstream can be seen at: http://osdir.com/ml/libvir-list/2011-01/msg01268.html

As you can see it's a single line change, the affected file for the maverick version is: src/qemu/qemu_driver.c (seems like they did some code refactoring on the version used on that email )

I applied the patch by hand, recompiled and installed it and the ebs mount worked.

===============================
SRU Justification:
1. impact: VMs are not able to mount drives
2. How bug was addressed: a patch was cherrypicked from upstream which fixes the mistaken assignment of 0 rather than the chosen controller.
3. Minimal patch: see the linked bzr tree
4. To reproduce: mount a scsi device as /dev/sdh.
 1. # virsh attach-disk --target sdb ...
 2. # virsh attach-disk --target sdh ...
5. Regression potential: only one line is changed, following a patch from upstream.
===============================

See original description
Revision history for this message
Serge Hallyn (serge-hallyn) wrote :

Confirmed based on the fact that it is confirmed upstream :)

Patch needs to be re-generated against qemu_driver.c as qemu_hotplug.c doesn't yet exist in maverick's libvirt. I will create the patch and SRU.

For SRU justification, from the linked upstream email:

Steps to reproduce this bug:
> 1. # virsh attach-disk --target sdb ...
> 2. # virsh attach-disk --target sdh ...
> error: Failed to attach disk
> error: operation failed: target scsi:0 already exists
>
> sdh uses scsi:1, rather than scsi:0.
>

Changed in libvirt (Ubuntu):
status: New → Confirmed
importance: Undecided → High
Revision history for this message
Serge Hallyn (serge-hallyn) wrote :
Revision history for this message
Serge Hallyn (serge-hallyn) wrote :

@Carlos, could you test the .debs posted in comment #2? If they fix the issue for you then I'll push for SRU.

Changed in libvirt (Ubuntu):
status: Confirmed → In Progress
assignee: nobody → Serge Hallyn (serge-hallyn)
Revision history for this message
Carlos Perelló Marín (carlos) wrote :

Confirmed, it fixes the issue.

Thanks for the speed fixing it!

Serge Hallyn (serge-hallyn)
Changed in libvirt (Ubuntu Maverick):
status: New → In Progress
Changed in libvirt (Ubuntu):
status: In Progress → Fix Released
Changed in libvirt (Ubuntu Maverick):
importance: Undecided → High
assignee: nobody → Serge Hallyn (serge-hallyn)
Serge Hallyn (serge-hallyn)
description: updated
Revision history for this message
Martin Pitt (pitti) wrote : Please test proposed package

Accepted libvirt into maverick-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Changed in libvirt (Ubuntu Maverick):
status: In Progress → Fix Committed
tags: added: verification-needed
Revision history for this message
JC Hulce (soaringsky) wrote :

This bug affects Ubuntu 10.10, Maverick Meerkat. Maverick has reached end-of-life and is no longer supported, so I am closing the bugtask for Maverick. Please upgrade to a newer version of Ubuntu.
More information here: https://lists.ubuntu.com/archives/ubuntu-announce/2012-April/000158.html

Changed in libvirt (Ubuntu Maverick):
status: Fix Committed → Invalid
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