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Bug 1160212 - libvirt doesn't stop the NBD server after migration
Summary: libvirt doesn't stop the NBD server after migration
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt
Version: 7.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Ján Tomko
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-11-04 11:01 UTC by Ján Tomko
Modified: 2015-03-05 07:46 UTC (History)
5 users (show)

Fixed In Version: libvirt-1.2.8-7.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-05 07:46:50 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0323 0 normal SHIPPED_LIVE Low: libvirt security, bug fix, and enhancement update 2015-03-05 12:10:54 UTC

Description Ján Tomko 2014-11-04 11:01:46 UTC 
Description of problem:
After migration with NBD, the NBD server stays running on the destination, occupying a TCP port.

Version-Release number of selected component (if applicable):
libvirt-1.2.8-5.el7.x86_64

How reproducible:
100 %

Steps to Reproduce:
1. Migrate a domain with --copy-storage-all

Actual results:
netstat -tnap shows qemu still listens on a port:
tcp6       0      0 :::49153                :::*                    LISTEN      8073/qemu-kvm       


Expected results:
The ports are no longer used after the migration finishes.

Additional info:
Upstream patch sent by Weiwei Li:
https://www.redhat.com/archives/libvir-list/2014-November/msg00046.html
Comment 1 Ján Tomko 2014-11-04 11:09:06 UTC 
Fixed upstream by:
commit c3012a023f2ae5763027cafc1cf2881a3c7c4b45
Author:     Weiwei Li <nuonuoli>
AuthorDate: 2014-11-04 10:52:10 +0100
Commit:     Ján Tomko <jtomko>
CommitDate: 2014-11-04 10:54:53 +0100

    qemu: stop NBD server after successful migration
    
    In qemuMigrationFinish mig->nbd can not be initialized by
    qemuMigrationEatCookie without the QEMU_MIGRATION_COOKIE_NBD flag.
    That causes qemuMigrationStopNBDServer to return early without
    stopping the NBD server properly.
    
    Signed-off-by: Weiwei Li <nuonuoli>
    Signed-off-by: Ján Tomko <jtomko>

git describe: v1.2.10-14-gc3012a0
Comment 5 zhenfeng wang 2014-11-19 03:36:54 UTC 
I can reproduce this bug with libvirt-1.2.8-5.el7.x86_64

steps 
1.migrate guest from the source to the target with --copy-storage-all option

# virsh migrate --live --copy-storage-all rhel6 qemu+ssh://10.66.100.131/system --verbose
root.100.131's password: 
Migration: [100 %]

2.After finish migration, still could see the nbd service occupying a TCP port.

# netstat -tunlp|grep qemu-kvm
      
tcp6       0      0 :::49154                :::*                    LISTEN      2934/qemu-kvm       

Verify this bug with libvirt-1.2.8-7.el7, after finish storage migration with --copy-storage-all, the nbd service will release all ports which its occupy previous

# netstat -tunlp|grep qemu-kvm
tcp        0      0 0.0.0.0:5900            0.0.0.0:*               LISTEN      3455/qemu-kvm
Comment 7 errata-xmlrpc 2015-03-05 07:46:50 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/RHSA-2015-0323.html
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