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Bug 1710465

Summary:	[RFE] migrate from single stack to multi-stack/split-controlplane
Product:	Red Hat OpenStack	Reporter:	James Slagle <jslagle>
Component:	openstack-tripleo	Assignee:	James Slagle <jslagle>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Marian Krcmarik <mkrcmari>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	16.0 (Train)	CC:	acanan, amcleod, bdobreli, chjones, dcadzow, gcharot, harsh.kotak, mburns, nlevinki, ohochman, owalsh, scohen, sputhenp
Target Milestone:	---	Keywords:	Documentation, FutureFeature, TechPreview, Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	docs-accepted
Fixed In Version:		Doc Type:	Release Note
Doc Text:	When you upgrade from Red Hat OpenStack Platform (RHOSP) 13 DCN to RHOSP 16.1 DCN, it is not possible to migrate from the single stack RHOSP 13 deployment into a multi-stack RHOSP 16.1 deployment. The RHOSP 13 stack continues to be managed as a single stack in the Orchestration service (heat) even after you upgrade to RHOSP 16.1. + After you upgrade to RHOSP 16.1, you can deploy new DCN sites as new stacks. For more information, see the multi-stack documentation for RHOSP 16.1 DCN.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-08-02 14:46:16 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:	1789430

Description James Slagle 2019-05-15 15:04:01 UTC

Need to document how we plan to support upgrades from 13 single stack to 16 multi-stack.

We plan to support deploying additional stacks to connect to the single stack from an upgraded 13->16 deployment.

We don't support a way to breakup the upgraded single stack, other than parallel migration to new hardware (scale down single stack, deploy additional new stack for the site).