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Bug 1191729

Summary:	[3.5_6.6] - VM fails to start in snapshot preview mode with a RAM snapshot
Product:	Red Hat Enterprise Virtualization Manager	Reporter:	Gordon Watson <gwatson>
Component:	rhev-hypervisor	Assignee:	Fabian Deutsch <fdeutsch>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	urgent	Docs Contact:
Priority:	high
Version:	3.5.0	CC:	amureini, dyuan, ecohen, fdeutsch, gklein, lpeer, lsurette, mkalinin, pstehlik, rbalakri, Rhev-m-bugs, slitmano, ycui, yeylon, ylavi
Target Milestone:	---	Keywords:	ZStream
Target Release:	3.5.1	Flags:	ylavi: Triaged+
Hardware:	Unspecified
OS:	Linux
Whiteboard:	node
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-04-28 18:39:27 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Node	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1193058, 1197441

Description Gordon Watson 2015-02-11 20:21:56 UTC

Description of problem:

If a live snapshot of a VM is taken with 'Save Memory' selected, and that snapshot is later previewed with 'Restore Memory' selected, then the VM will fails to start.

VDSM reports;

Thread-49::ERROR::2015-02-11 20:06:19,190::vm::2324::vm.Vm::(_startUnderlyingVm) vmId=`3b8bd683-c75d-413b-b58c-b3ad20dada54`::The vm start process failed
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/vm.py", line 2264, in _startUnderlyingVm
  File "/usr/share/vdsm/virt/vm.py", line 3307, in _run
  File "/usr/lib/python2.6/site-packages/vdsm/libvirtconnection.py", line 111, in wrapper
  File "/usr/lib64/python2.6/site-packages/libvirt.py", line 3225, in restoreFlags
libvirtError: unsupported configuration: Target controller type ide does not match source usb


If the snapshot is previewed without 'Restore Memory' selected, then the VM will start up successfully.

This is not a problem in a 3.4 environment with a RHEL 6.5 host with 'vdsm-4.14.13-2' and 'libvirt-0.10.2-46'.


Version-Release number of selected component (if applicable):

RHEV 3.5 RC build (rhevm-3.5.0-0.29)
RHEV-H 6.6 20150114.0
   - vdsm-4.16.8.1-5
   - libvirt-0.10.2-46.el6_6.2


How reproducible:

Fails every time for me.


Steps to Reproduce:

1. Take a live VM snapshot with 'Save Memory' selected.
2. Shutdown VM.
3. Preview the snapshot with 'Restore Memory' selected.
4. VM fails to start, "Target controller type ide does not match source usb".
5. Undo snapshot.
6. Preview the snapshot without 'Restore Memory' selected.
7. VM starts successfully.

If steps 1-4 are performed in 3.4 on RHEL 6.5 host with 'vdsm-4.14.13-2' and 'libvirt-0.10.2-46' then the VM will start without a problem.


Actual results:

VM fails to start.


Expected results:

VM should start.


Additional info:

Comment 4 sefi litmanovich 2015-02-15 13:31:32 UTC

Hi, I tried to reproduce in rhevm-3.5.0-0.31.el6ev.noarch env with several hosts:

1. same steps as in description with RHEL 7 host -
vdsm-4.16.8.1-6.el7ev.
libvirt-1.1.1-29.el7_0.7.

bug didn't re produce.

2. same with RHEL 6.5 host on 3.4 cluster with -
vdsm-4.14.18-6.el6ev
libvirt-0.10.2-29.el6_5.13

bug didn't re produce.

3. same again with RHEL 6.6 host with -
vdsm-4.16.8.1-6.el6ev
libvirt-0.10.2-46.el6_6.3

bug didn't re produce.

4. same with RHEV Hypervisor - 6.6 - 20150128.0.el6ev
vdsm-4.16.8.1-6.el6ev
libvirt-0.10.2-46.el6_6.2

bug re produced with the same error as mentioned in description.
In my case, the vm then migrated to the RHEL 6.6 on the same cluster and then went up.

So it seems it's a RHEV-H bug only, or it's a libvirt-0.10.2-46.el6_6.2 bug which is fixed on:
libvirt-0.10.2-46.el6_6.3

Comment 7 Fabian Deutsch 2015-02-16 09:46:31 UTC

Changing the component according to the findings in comment 6 - this is caused by an outdated libvirt build.

Comment 9 Ying Cui 2015-03-19 11:38:52 UTC

see comment 6, comment 7 and comment 8
Verified this bug on rhev-hypervisor6-6.6-20150312.0

# rpm -q libvirt
libvirt-0.10.2-46.el6_6.3.x86_64
# cat /etc/system-release
Red Hat Enterprise Virtualization Hypervisor 6.6 (20150312.0.el6ev)

Comment 11 errata-xmlrpc 2015-04-28 18:39:27 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.

https://rhn.redhat.com/errata/RHBA-2015-0902.html