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Bug 2078266

Summary:	[RCA][OSP16.1] Neutron HA qrouter namespace disappeared and router in inconsistent state in DB
Product:	Red Hat OpenStack	Reporter:	James Mittermair <jmitterm>
Component:	openstack-neutron	Assignee:	Slawek Kaplonski <skaplons>
Status:	CLOSED ERRATA	QA Contact:	Roman Safronov <rsafrono>
Severity:	low	Docs Contact:
Priority:	high
Version:	16.1 (Train)	CC:	averdagu, chrisw, froyo, scohen
Target Milestone:	z9	Keywords:	Triaged
Target Release:	16.1 (Train on RHEL 8.2)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openstack-neutron-15.2.1-1.20220517133404.40d217c.el8ost	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-07 20:28:59 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 James Mittermair 2022-04-25 01:59:03 UTC

Description of problem:
- Customer reported an issue where floating IPs assigned to instances were no longer working, but other IPs from the same network range assigned directly were working.

Environment:
- ML2/OVS
- Non-DVR w/ HA router

Version-Release number of selected component (if applicable):
RHOSP 16.1.6
openstack-neutron-15.2.1-1.20210409073445.40d217c.el8ost.noarch
[1] openstack-neutron-server (https://catalog.redhat.com/software/containers/rhosp-rhel8/openstack-neutron-server/5de6be9fd70cc51644a57114?tag=16.1.6-8.1627296179&push_date=1627500607000&container-tabs=packages)

How reproducible:
N/A

Steps to resolve:
- Disabled the router
- Manually set the router to non-ha in the ovs_neutron database
- Enabled the router so it would come up on one controller (from here we could ping the GW and attached FIP)
- Disabled the router
- Enabled HA mode
- Enabled the router (at this stage the router came up on all 3 controllers with one active)

Additional info:
- Checking qrouter namespaces on controllers via `ip netns list` shows qrouter namespaces are missing.
- Can create new routers and the qrouter namespaces correctly get created.
- Query `select * from ha_router_agent_port_bindings where router_id="${routerID}"` in `ovs_neutron` DB returned 0 results.
- See private comment for logs.

Comment 19 errata-xmlrpc 2022-12-07 20:28:59 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 (Moderate: Red Hat OpenStack Platform 16.1.9 (openstack-neutron) security update), 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://access.redhat.com/errata/RHSA-2022:8870