Bug 1322129

Summary:	[RFE][cinder] Rolling Upgrades Support
Product:	Red Hat OpenStack	Reporter:	Sean Cohen <scohen>
Component:	openstack-cinder	Assignee:	Eric Harney <eharney>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Tzach Shefi <tshefi>
Severity:	high	Docs Contact:	Don Domingo <ddomingo>
Priority:	high
Version:	unspecified	CC:	egafford, eharney, geguileo, jdonohue, pgrist, srevivo
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	13.0 (Queens)
Hardware:	Unspecified
OS:	Unspecified
URL:	http://git.openstack.org/cgit/openstack/cinder/plain/doc/source/upgrade.rst?id=6c698bc8e36
Whiteboard:
Fixed In Version:		Doc Type:	Technology Preview
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-05-18 14:56:54 UTC	Type:	Feature Request
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	1419948, 1422243

Description Sean Cohen 2016-03-29 21:10:12 UTC

Scope:

To be able to perform Cinder upgrade without downtime of control plane services by
allowing Cinder services to be updated one at a time and yet still be operational.


Rolling upgrades capabilities have been introduced in Mitaka release
with Online DB schema upgrade [1] and  RPC and VersionedObject Compatibility [2], where RPC versions and objects are pinned to a backwards compatible version and later switched to the latest Version. 

[1] https://blueprints.launchpad.net/cinder/+spec/online-schema-upgrades
[2] https://blueprints.launchpad.net/cinder/+spec/rpc-object-compatibility

Comment 1 Sean Cohen 2016-05-16 01:36:17 UTC

Pending test upgrades in upstream CI (http://lists.openstack.org/pipermail/openstack-dev/2016-January/084528.html)

Comment 3 Paul Grist 2017-05-18 14:56:54 UTC

Closing this one out based on the rolling upgrade tag and support being in Cinder now and patches merged. 

We can open new RFEs as needed for no-downtime, there may be dependencies there on A-A and the container deployment/upgrade.