Bug 1309608

Summary:	Smooth upgrade
Product:	Red Hat OpenStack	Reporter:	Hideki Kawai <h-kawai>
Component:	rhosp-director	Assignee:	Angus Thomas <athomas>
Status:	CLOSED CANTFIX	QA Contact:	yeylon <yeylon>
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dbecker, mburns, morazi, nbarcet, rhel-osp-director-maint, srevivo
Target Milestone:	---
Target Release:	8.0 (Liberty)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-02-18 15:22:54 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 Hideki Kawai 2016-02-18 09:38:51 UTC

Description of problem:

Currently, it is necessary to stop services to upgrade OpenStack, and OpenStack needs to be upgraded with every verison. 
(Ex. Kilo->Liberty, Liberty->Mitaka)

We need a smooth upgrade where OpenStack can be upgraded without stopping resources already provisioned, and it allows skip of some versions.
(Ex. Kilo -> Mitaka, Icehouce->Mitaka)

Comment 2 Stephen Gordon 2016-02-18 12:47:32 UTC

*** Bug 1309605 has been marked as a duplicate of this bug. ***

Comment 3 Stephen Gordon 2016-02-18 12:48:16 UTC

*** Bug 1309606 has been marked as a duplicate of this bug. ***

Comment 4 Nick Barcet 2016-02-18 15:22:54 UTC

Unfortunately, this would involve having the OpenStack community accept that we need to have stability on the internal communication process (RPC) that is being used to communicate between controllers and agents.  It was already an enormous push to get this happening for N -> N+1, and is barely completed with Mitaka.  I am not sure we will be able to make this happen in a short term release without blocking the project's evolution more than what would be acceptable by upstream.