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Bug 689921 - [vdsm][scale] Split-brain during failed migration
Summary: [vdsm][scale] Split-brain during failed migration
Keywords:
Status: CLOSED DUPLICATE of bug 690175
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: vdsm
Version: 6.1
Hardware: Unspecified
OS: Linux
unspecified
high
Target Milestone: rc
: ---
Assignee: Dan Kenigsberg
QA Contact: yeylon@redhat.com
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-22 19:37 UTC by David Naori
Modified: 2016-04-18 06:39 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-03-28 15:48:18 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
vdsm source and destenation logs (1.51 MB, application/x-gzip)
2011-03-22 19:37 UTC, David Naori
no flags Details

Description David Naori 2011-03-22 19:37:40 UTC
Created attachment 486882 [details]
vdsm source and destenation logs

Description of problem:

during scale testing, *failed migration of a vm to destination host that runs 90 vms, finish with split brain. 

* Failed migration - libvirt daemon was restarted during that operation on source host. 

Flow: 

- destination host runs 90 vms 
- call migrate on source - migration starts
- 5-10 seconds later - /etc/init.d/libivrtd restart 
- connection to libvirt is broken - vdsm takes it self down 
- on destination server, call destroy is initiated, but fails due to operation time-out, vm runs on destination server in paused state.
- on source server, vdsm performs vm recovery, and runs the vm. 

result: split brain. 

vdsClient -s 0 list table:

destination host:
4afaa2bb-d570-4ae4-964a-f19507ca786b  73182  FC-0-30              Paused*

source host:
4afaa2bb-d570-4ae4-964a-f19507ca786b  79552  FC-0-30              Up


Versions:
-vdsm-4.9-55.el6.x86_64
-libvirt-0.8.7-13.el6.x86_64

attached source and destination vdsm logs.

Comment 1 Dan Kenigsberg 2011-03-28 15:48:18 UTC
Come to think of it, we reflect the state that libvirt reports as of bug 690175, so there's nothing we can do about it here.

*** This bug has been marked as a duplicate of bug 690175 ***


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