Bug 1982752

Summary:	[OVN] Enable ovn-monitor-all to help with OVN scale
Product:	Red Hat OpenStack	Reporter:	Lucas Alvares Gomes <lmartins>
Component:	puppet-ovn	Assignee:	OSP Team <rhos-maint>
Status:	CLOSED ERRATA	QA Contact:	Udi Shkalim <ushkalim>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	16.2 (Train)	CC:	ekuris, jlibosva
Target Milestone:	z2	Keywords:	Triaged
Target Release:	16.2 (Train on RHEL 8.4)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	puppet-ovn-15.5.0-2.20211118004950.5ea0ae2.el8ost	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:
Clones:	2037940 (view as bug list)		Environment:
Last Closed:	2022-03-23 22:10:49 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:
Bug Blocks:	2037940

Description Lucas Alvares Gomes 2021-07-15 15:41:14 UTC

With conditional monitoring enabled the OVN databases (OVSDBs) have to do a lot of extra work when sending update to the clients connected to it. On a deployment such as the PSI with many clients connecting to the OVN databses this problem was very apparent.

The OVSDBs support an option called "ovn-monitor-all" that can be set to help relieving this problem as it makes the conditional monitoring be processed at the client side instead of the server side.

This BZ is suggesting that we set this option to True by default in the OSP environments as this clearly helped with the scalability of OVN. Both PSI as well as OCP relies on this option so it should be safe.

Puppet-ovn should add support for setting this option on every chassis:

$ ovs-vsctl set open . external_ids:ovn-monitor-all=true

Comment 12 errata-xmlrpc 2022-03-23 22:10:49 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 (Release of components for Red Hat OpenStack Platform 16.2.2), 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/RHBA-2022:1001