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Bug 1646332

Summary:	Pacemaker resource constraints cause API outage during maintenance
Product:	Red Hat OpenStack	Reporter:	Lukas Bezdicka <lbezdick>
Component:	openstack-tripleo-heat-templates	Assignee:	Lukas Bezdicka <lbezdick>
Status:	CLOSED ERRATA	QA Contact:	Raviv Bar-Tal <rbartal>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	10.0 (Newton)	CC:	cswanson, jamsmith, lbezdick, marjones, mbracho, mburns, sathlang, slinaber
Target Milestone:	z10	Keywords:	Triaged, ZStream
Target Release:	10.0 (Newton)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openstack-tripleo-heat-templates-5.3.10-22.el7ost	Doc Type:	Bug Fix
Doc Text:	This update fixes an issue that caused OpenStack API outages and control plane loss during execution of the "pcs cluster stop" command, greatly reducing the incidence of failed requests during minor updates. Note: In manual maintenance procedures, operators should migrate the VIPs off the affected node first.	Story Points:	---
Clone Of:
Clones:	1647438 (view as bug list)		Environment:
Last Closed:	2019-01-16 17:09:41 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:	1585770, 1647438

Description Lukas Bezdicka 2018-11-05 12:04:51 UTC

In more targeted testing of OSP10 minor update we found out there is an issue with way pacemaker services are created and how we defined the order constraints. We will have to provide fix for all the releases of OSP, but for OSP10 we probably will go with workaround I created and tested. Issue is pacemaker resource order constraints are kind Optional which means they do not apply on shutdown of pacemaker cluster on the node. This causes haproxy to be stopped before the VIP is migrated away from the node and subsequent APIs failure. Migration of VIPs will be applied in yum_update.sh script but we should also update the reboot documentation/procedure for the operators.

Comment 10 errata-xmlrpc 2019-01-16 17:09:41 UTC

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/RHBA-2019:0055