Bug 1371943
| Summary: | RHSA-2016-1756 breaks migration of instances | |||
|---|---|---|---|---|
| Product: | Red Hat OpenStack | Reporter: | Jeremy <jmelvin> | |
| Component: | qemu-kvm-rhev | Assignee: | Virtualization Maintenance <virt-maint> | |
| Status: | CLOSED DUPLICATE | QA Contact: | Shai Revivo <srevivo> | |
| Severity: | high | Docs Contact: | ||
| Priority: | high | |||
| Version: | 8.0 (Liberty) | CC: | amedeo.salvati, aperotti, berrange, blake.c.anderson, c.hendrickson09, dasmith, dh3, eglynn, furlongm, jherrman, kamfonik, kchamart, knoel, mburns, moshele, mst, rcernin, sbauza, sferdjao, sgordon, srevivo, stefanha, vaggarwa, virt-maint, vromanso | |
| Target Milestone: | --- | Keywords: | Triaged | |
| Target Release: | 10.0 (Newton) | |||
| Hardware: | Unspecified | |||
| OS: | Unspecified | |||
| Whiteboard: | ||||
| Fixed In Version: | qemu-kvm-rhev-2.6.0-25.el7 | Doc Type: | Bug Fix | |
| Doc Text: |
The fix for CVE-2016-5403 caused migrating guest instances to fail with a "Virtqueue size exceeded" error message. With this update, the value of the virtualization queue is recalculated after the migration, and the described problem no longer occurs.
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Story Points: | --- | |
| Clone Of: | ||||
| : | 1372763 1374364 1374365 1374366 1374367 1374368 1374369 (view as bug list) | Environment: | ||
| Last Closed: | 2016-10-13 13:42:34 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: | 1372763, 1376542 | |||
| Bug Blocks: | 1374364, 1374365, 1374366, 1374367, 1374368, 1374369 | |||
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Description
Jeremy
2016-08-31 13:38:48 UTC
It seem that it working with qemu2.6 but when back-porting to older version it break things. Ubunut already revert the patch in 14.04 and 16.04 see https://www.redhat.com/archives/libvir-list/2016-August/msg01287.html and https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1612089. It's not totally clear for me if that issue is coming only when statistics are enabled for the balloon device. According to [1] that seems to be the case. A possible workaround would be to ask Nova to do not enable that feature. For libvirt driver the config option 'mem_stats_period_seconds' can be set to 0. mem_stats_period_seconds = 0 This issue is mostly related to the version of QEMU we are shipping for RHEL7 [2], We probably have to report a regression for that component since at this step of our understanding of the bug, the compute team can't really fix it. [1] https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1612089 [2] https://bugzilla.redhat.com/show_bug.cgi?id=1358359 I reproduced that issue on RHOS7. The issue is even more critical since the guest totally disappears and no way to retrieve it from Nova. I can also confirm that the workaround for Nova is working, just disable the report of statistics for the memory balloon device. mem_stats_period_seconds = 0 This is also a regression on Mitaka. I can confirm that the packages provided in bug 1372763#3 are fixing the issue in Nova for live migration (Tested with RHOS7). *** This bug has been marked as a duplicate of bug 1374364 *** nevermind, verification should be on bug 1374364 Dup -- QE will decide about automating the original |