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Bug 2211426

Summary:	Document ml2/ovn parity gap where reverse DNS resolution is not working in OSP 16.2
Product:	Red Hat OpenStack	Reporter:	Ihar Hrachyshka <ihrachys>
Component:	documentation	Assignee:	James Smith <jamsmith>
Status:	CLOSED CURRENTRELEASE	QA Contact:	RHOS Documentation Team <rhos-docs>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	16.2 (Train)	CC:	ekuris, jamsmith
Target Milestone:	---	Keywords:	Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-12-08 13:59:14 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ihar Hrachyshka 2023-05-31 15:21:46 UTC

This bug was initially created as a copy of Bug #2196452

I am copying this bug because: 

During the work on the original bug, it was determined that 16.2 has an undocumented parity gap for OVN implementation for reverse DNS support for internal DNS records. ML2/OVS supports it in Train (16.2).

The support is available in OVN 2021 included with the release, but the neutron piece is not backported to the branch. I've asked the original bug reporter to report a separate bz to request this new feature, but in the meantime, (or in case we don't backport the feature to the branch), we should document this limitation in documentation.

FYI I've looked at the following page to confirm that this limitation is not documented yet: https://gitlab.cee.redhat.com/rhci-documentation/docs-Red_Hat_Enterprise_Linux_OpenStack_Platform/-/blob/osp162-train/common/networking/ref_ml2-ovn-limits.adoc?ref_type=heads

Comment 1 Ihar Hrachyshka 2023-05-31 15:51:55 UTC

Note that this is specific to 16.2. 17.x has support for the feature in neutron.