Bug 2070035

Summary:	16.1 -> 16.2 upgrade caused significant network downtime
Product:	Red Hat OpenStack	Reporter:	Alex Stupnikov <astupnik>
Component:	python-networking-ovn	Assignee:	Rodolfo Alonso <ralonsoh>
Status:	CLOSED NOTABUG	QA Contact:	Eran Kuris <ekuris>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	16.2 (Train)	CC:	apevec, egarciar, lhh, majopela, ralonsoh, scohen
Target Milestone:	---
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Hardware:	All
OS:	All
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2023-07-21 08:23:43 UTC	Type:	Bug
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Alex Stupnikov 2022-03-30 10:49:08 UTC

Description of problem:

One of our customers reported a problem with all instances (not 100% sure, but he believes that all instances are affected) connectivity during RHOSP 16.1.6 --> RHOSP 16.2.1 upgrade.

From provided logs it looks like Deployment Framework acted properly to address problem described in https://bugzilla.redhat.com/show_bug.cgi?id=1895220#c6 and OVN controllers were restarted and updated before ovn-northd.

At the same time, instances were not available for significant period of time, which could be related to some problem inside OVN. I can't find related error in compute logs.

I would like to ask for engineering help with OVN troubleshooting and possible bug isolation.