openstack snapshot, migration, suspend broken by invtsc

[Don Bowman]

===========================================================
SRU Justification:
1. Impact: migration fails
2. Test case: Have <cpu mode='host-model'> in xml and try to do virsh managedsave.
3. Regression potential: this same patch was applied to the same libvirt version some time ago in vivid. No regressions are therefore expected.
===========================================================

I believe this commit http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=de0aeafe9ce3eb414c8b5d3aa8995d776a2952de fixes the issue.

In OpenStack nova, one gets this error:
libvirtError: internal error: unable to execute QEMU command 'migrate': State blocked by non-migratable device 'cpu'

when executing 'nova image-create', or 'nova suspend' operations.

This in turn is caused by the 'invtsc' being used for 'host-model', preventing a migration.

$ lsb_release -rd
Description: Ubuntu 14.10
Release: 14.10

$ apt-cache policy libvirt-bin
libvirt-bin:
  Installed: 1.2.8-0ubuntu11
  Candidate: 1.2.8-0ubuntu11
  Version table:
 *** 1.2.8-0ubuntu11 0
        500 http://ca.archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages
        100 /var/lib/dpkg/status

[Launchpad Janitor (janitor)]

This bug was fixed in the package libvirt - 1.2.8-0ubuntu12

---------------
libvirt (1.2.8-0ubuntu12) vivid; urgency=medium

  * complete the 9p support: (LP: #1378434)
    - libvirt-qemu: add fowner and fsetid
    - virt-aa-helper: add 'l' to 9p file options
  * dont-include-non-migrateable-features-in-host-model (LP: #1386503)
 -- Serge Hallyn <email address hidden> Wed, 29 Oct 2014 15:07:21 -0500

[Tony Link (tlink)]

Will this fix work it's way into 14.10 ? or 1.2.8-0ubuntu12 made available for Utopic?

[Serge Hallyn (serge-hallyn)]

1.2.8-0ubuntu12 should be made avalable through the cloud archive. But I will mark this as affecting utopic and aim to add it to the next SRU round.

[Chris J Arges (arges)]

Hello Don, or anyone else affected,

Accepted libvirt into utopic-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/libvirt/1.2.8-0ubuntu11.4 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Don Bowman (donbowman)]

tried on utopic. resolved my issue with OpenStack snapshots.

[Launchpad Janitor (janitor)]

This bug was fixed in the package libvirt - 1.2.8-0ubuntu11.4

---------------
libvirt (1.2.8-0ubuntu11.4) utopic-proposed; urgency=medium

  * d/p/dont-include-non-migrateable-features-in-host-model: (LP: #1386503)
 -- Serge Hallyn <email address hidden> Tue, 10 Feb 2015 15:17:05 -0600

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for libvirt has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.