Bug 1038714

Summary:	[oslo] With QPID, RPC calls to a topic are always fanned-out to all subscribers.
Product:	Red Hat OpenStack	Reporter:	Perry Myers <pmyers>
Component:	openstack-heat	Assignee:	Steven Dake <sdake>
Status:	CLOSED WONTFIX	QA Contact:	Kevin Whitney <kwhitney>
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	dallan, hateya, kgiusti, ndipanov, sbaker, sdake, shardy, srevivo, yeylon
Target Milestone:	rc
Target Release:	4.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1038641	Environment:
Last Closed:	2013-12-05 18:15:14 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:

Description Perry Myers 2013-12-05 16:38:23 UTC

+++ This bug was initially created as a clone of Bug #1038641 +++

Description of problem:


  See upstream bug:

  https://bugs.launchpad.net/oslo/+bug/1257293

  Note well: this bug _only_ affects those QPID configurations that have applied the fix of the following bug:

   https://bugs.launchpad.net/oslo/+bug/1178375


  _AND_ are have configured "qpid_topology_version=2"



Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

--- Additional comment from RHEL Product and Program Management on 2013-12-05 09:44:55 EST ---

Since this issue was entered in bugzilla, the release flag has been
set to ? to ensure that it is properly evaluated for this release.

--- Additional comment from Dave Allan on 2013-12-05 10:11:18 EST ---

Checking into risk of fix; may want to take for 4.0GA

--- Additional comment from Perry Myers on 2013-12-05 11:30:41 EST ---

This seems important enough to be an RC blocker for 4.0.  But doesn't this bug need to be cloned to Nova, Ceilometer, Neutron, etc (every component that copies and pastes the code from Oslo for RPC?)

Comment 1 Steven Dake 2013-12-05 18:15:14 UTC

I have tested Heat 2013.2 with QPID in devstack, and it does not fan out to every node, but instead load balances.

In any regard, we don't support multiple heat-engines either upstream or down presently, so this is a non-issue.  Horizontal scalability is something that should be addressed in Icehouse.  The only way this bug would affect heat is if multiple heat-engines (which are the subscribers to the message queues) were launched, which results in an unsupportable Heat environment.