Bug 1200986 – sqlalchemy object reuse breaks multi-backend

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Bug 1200986 - sqlalchemy object reuse breaks multi-backend

Summary:	sqlalchemy object reuse breaks multi-backend

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat OpenStack
Classification:	Red Hat
Component:	openstack-cinder (Show other bugs)
Sub Component:
Version:	7.0 (Kilo)
Hardware:	Unspecified Unspecified

Priority	medium Severity high
Target Milestone:	ga
Target Release:	7.0 (Kilo)
Assigned To:	Eric Harney
QA Contact:	Yogev Rabl
Docs Contact:

URL:
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Keywords:

Depends On:
Blocks:
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Reported:	2015-03-11 14:39 EDT by Eric Harney
Modified:	2016-04-26 11:59 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:	openstack-cinder-2015.1.0-2.el7ost
Doc Type:	Bug Fix
Doc Text:	Prior to this update, SQLAlchemy objects were incorrectly shared between multiple 'cinder-volume' processes. Consequently, SQLAlchemy connections would fail when using a Block Storage multi-backend, resulting in database-related errors in the volume service. This fix re-initializes SQLAlchemy connections when forking 'cinder-volume' child processes. As a result multi-backend now works as expected.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-08-05 09:22:12 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Launchpad	1417018	None	None	None	Never
OpenStack gerrit	163551	None	None	None	Never
Red Hat Product Errata	RHEA-2015:1548	normal	SHIPPED_LIVE	Red Hat Enterprise Linux OpenStack Platform Enhancement Advisory	2015-08-05 13:07:06 EDT

Groups: None (edit)

Description Eric Harney 2015-03-11 14:39:43 EDT

When configuring Cinder for multi-backend, unsafe sqlalchemy usage causes database errors.

Need to ensure that this gets patched in Cinder or oslo.db.

This likely will not be seen before Kilo (7.0) even though the code in prior versions is not correct.

Comment 6 Yogev Rabl 2015-06-28 10:42:59 EDT

verified in version
openstack-cinder-2015.1.0-3.el7ost.noarch
python-cinder-2015.1.0-3.el7ost.noarch

Comment 8 errata-xmlrpc 2015-08-05 09:22:12 EDT

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2015:1548

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