Bug 2033430

Summary:	Live migration fails
Product:	Red Hat OpenStack	Reporter:	jhardee
Component:	openstack-nova	Assignee:	OSP DFG:Compute <osp-dfg-compute>
Status:	CLOSED DUPLICATE	QA Contact:	OSP DFG:Compute <osp-dfg-compute>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	16.2 (Train)	CC:	bdobreli, dasmith, dhill, dvd, eglynn, jhakimra, kchamart, mschuppe, sbauza, sgordon, vromanso
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	tripleo-ansible-0.8.1-2.20211223005854.b33463b.el8ost	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-01-18 20:14:48 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:

Description jhardee 2021-12-16 19:30:56 UTC

Description of problem:

Customer live migrating a VM on same node.  Migration fails with 
~~~
"2021-12-16 17:55:53.813 7 ERROR nova.virt.libvirt.driver [-] [instance: bab26e1a-7ba7-4c7d-ba89-a959a69df21d] Live Migration failure: internal error: unable to execute QEMU command 'migrate-set-capabilities': Postcopy is not supported: libvirt.libvirtError: internal error: unable to execute QEMU command 'migrate-set-capabilities': Postcopy is not supported"
~~~

They are seeing this happening across all clusters in production

Version-Release number of selected component (if applicable):
RHOSP 16.2


How reproducible:
N/A


Steps to Reproduce:
1.
2.
3.

Actual results:

Live migration fails on same compute node


Expected results:

Live migration completes on same compute node



Additional info:

Comment 1 Martin Schuppert 2021-12-17 09:13:35 UTC

This looks that it might be related to https://bugzilla.redhat.com/show_bug.cgi?id=1992506
if this compute e.g. use dpdk.

Until this is clarified a workaround would be to disable postcopy for the compute role:

parameter_defaults:
  <ComputeRoleName>Parameters:
    NovaLiveMigrationPermitPostCopy: False