Bug 1126447

Summary:	[RFE][nova] Optionally allow nova-scheduler to be deployed as Active/Active or Active/Passive
Product:	Red Hat OpenStack	Reporter:	Scott Lewis <sclewis>
Component:	openstack-foreman-installer	Assignee:	Jason Guiditta <jguiditt>
Status:	CLOSED ERRATA	QA Contact:	Asaf Hirshberg <ahirshbe>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	5.0 (RHEL 7)	CC:	aberezin, ajeain, breeler, dnavale, jguiditt, lnatapov, mburns, morazi, oblaut, rbalakri, rhos-maint, sclewis, sgordon, yeylon
Target Milestone:	z1	Keywords:	FutureFeature
Target Release:	Installer
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openstack-foreman-installer-2.0.23-1.el6ost	Doc Type:	Enhancement
Doc Text:	This enhancement adds support to allow nova-scheduler to be deployed as Active/Passive deployments as Active/Active deployments are not desired for all HA scenarios. To use the Active/Passive deployment, set scheduler_host_subset_size parameter to 1 in the advanced configuration tab.	Story Points:	---
Clone Of:	1104219	Environment:
Last Closed:	2014-10-01 13:25:52 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:	1104219
Bug Blocks:	1083890, 1104884, 1111701

Comment 2 Leonid Natapov 2014-08-19 13:10:48 UTC

ruby193-rubygem-foreman_openstack_simplify-0.0.6-8.el6ost.noarch
rhel-osp-installer-0.1.10-2.el6ost.noarch
openstack-puppet-modules-2014.1-20.1.el6ost.noarch
openstack-foreman-installer-2.0.21-1.el6ost.noarch

I've changed the scheduler_host_subset_size value from 30 to 1 in the advanced configuration tab to use A/P.

HA Deployment fails with: 

/Stage[main]/Quickstack::Pacemaker::Nova/Quickstack::Pacemaker::Constraint::Base[nova-api-scheduler-constr]/Pacemaker::Constraint::Base[nova-api-scheduler-constr]/Exec[Creating order constraint nova-api-scheduler-constr]/returns

change from notrun to 0 failed: /usr/sbin/pcs constraint order start openstack-nova-api-clone then start openstack-nova-scheduler-clone returned 1 instead of one of [0]

Comment 4 Jason Guiditta 2014-09-08 21:00:17 UTC

Patch:
https://github.com/redhat-openstack/astapor/pull/356

Comment 6 Asaf Hirshberg 2014-09-30 12:35:00 UTC

default is currently set to 30.

[root@macf04da2732fb1 ~]# grep -ir host_subset /etc/nova/nova.conf
#scheduler_host_subset_size=1
scheduler_host_subset_size=30

[root@puma42 ~]# rpm -qa |grep rhel
rhel-osp-installer-0.3.6-1.el6ost.noarch

Comment 7 Jason Guiditta 2014-09-30 13:45:19 UTC

That is what the default should be.  When set this way, scheduler is A/A.  When you change it to 1, the schedulers should be A/P

Comment 10 errata-xmlrpc 2014-10-01 13:25:52 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.

http://rhn.redhat.com/errata/RHBA-2014-1350.html