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Bug 879780

Summary:	vol-clone failed to clone LVM volumes
Product:	Red Hat Enterprise Linux 6	Reporter:	János Tamási <janusz>
Component:	libvirt	Assignee:	Ján Tomko <jtomko>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	6.4	CC:	acathrow, dyasny, dyuan, jtomko, mjenner, mzhan, rwu, whuang, zpeng
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	All
Whiteboard:
Fixed In Version:	libvirt-0.10.2-10.el6	Doc Type:	Bug Fix
Doc Text:	Cause: A cleanup in virStorageBackendLogicalCreateVol removed the setting of volume type. Consequence: Volume was treated as a file without a format and libvirt was unable to clone it. Fix: Set the volume type. Result: Logical volumes can be cloned.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-02-21 07:27:42 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:
Bug Depends On:
Bug Blocks:	881827

Description János Tamási 2012-11-24 10:20:27 UTC

Description of problem:
After upgrading libvirt from 0.9.10 to 1.0.0 vol-clone is not working anymore with LVM volumes. Downgrading libvirt to the latest 0.9 series (0.9.13) works fine.

Version-Release number of selected component (if applicable):
libvirt 1.0.0
qemu 1.2

How reproducible:
clone an existing LVM volume: vol-clone --pool storage vs1 vs12

Actual results:
virsh # vol-clone --pool storage vs1 vs12
error: Failed to clone vol from vs1
error: belső hiba: Child process (/usr/bin/qemu-img convert -f raw -O none /dev/storage/vs1 /dev/storage/vs12) unexpected exit status 1: 2012-11-24 10:10:25.786+0000: 20306: debug : virFileClose:72 : Closed fd 27
2012-11-24 10:10:25.786+0000: 20306: debug : virFileClose:72 : Closed fd 29
2012-11-24 10:10:25.786+0000: 20306: debug : virFileClose:72 : Closed fd 25
2012-11-24 10:10:25.786+0000: 20306: debug : virCommandHook:2119 : Hook is done 0
qemu-img: Unknown file format 'none'

Comment 2 Ján Tomko 2012-11-25 02:06:00 UTC

Reproducible with libvirt-0.10.2-9.el6 as well.

Proposed upstream patch:
https://www.redhat.com/archives/libvir-list/2012-November/msg01055.html

Comment 3 Ján Tomko 2012-11-26 13:28:00 UTC

Fixed upstream by:
commit 70f0bbe8e046dae1b811378f735872d3e61f4609
Author:     Ján Tomko <jtomko>
AuthorDate: 2012-11-25 02:59:33 +0100
Commit:     Michal Privoznik <mprivozn>
CommitDate: 2012-11-26 14:01:29 +0100

    storage: fix logical volume cloning

Downstream backport:
http://post-office.corp.redhat.com/archives/rhvirt-patches/2012-November/msg00266.html

Comment 5 zhe peng 2012-11-30 06:06:48 UTC

I can reproduce this with build:
libvirt-0.10.2-9.el6.x86_64

verify with:
libvirt-0.10.2-10.el6.x86_64

step:
  1: create a lvm pool
 # virsh pool-dumpxml lvm
<pool type='logical'>
  <name>lvm</name>
  <uuid>a2dc4aad-ff27-41d5-f598-612dbfe91620</uuid>
  <capacity unit='bytes'>20967325696</capacity>
  <allocation unit='bytes'>11811160064</allocation>
  <available unit='bytes'>9156165632</available>
  <source>
    <device path='/dev/sda2'/>
    <name>vg_virt</name>
    <format type='lvm2'/>
  </source>
  <target>
    <path>/dev/vg_virt</path>
    <permissions>
      <mode>0755</mode>
      <owner>-1</owner>
      <group>-1</group>
    </permissions>
  </target>
</pool>
  2: clone lvm vol
  # virsh vol-clone --pool lvm vgtest1 vgtest3
Vol vgtest3 cloned from vgtest1
  
  # virsh vol-list lvm
Name                 Path                                    
-----------------------------------------             
vgtest1              /dev/vg_virt/vgtest1                    
vgtest2              /dev/vg_virt/vgtest2                    
vgtest3              /dev/vg_virt/vgtest3 
 
  vgtest3 created w/o error, verification passed.

Comment 6 errata-xmlrpc 2013-02-21 07:27:42 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2013-0276.html