Bug 1243601

Summary:	Overcloud deploys default to qemu instead of kvm
Product:	Red Hat OpenStack	Reporter:	Ben Nemec <bnemec>
Component:	python-rdomanager-oscplugin	Assignee:	Lennart Regebro <lregebro>
Status:	CLOSED ERRATA	QA Contact:	Marius Cornea <mcornea>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	Director	CC:	akrivoka, beagles, brad, calfonso, dmacpher, jslagle, mburns, mcornea, nbarcet, rhel-osp-director-maint, rkharwar, sasha, sgordon
Target Milestone:	y1	Keywords:	Triaged, ZStream
Target Release:	7.0 (Kilo)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	python-rdomanager-oscplugin-0.0.10-1.el7ost	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-10-08 12:14:55 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:

Description Ben Nemec 2015-07-15 21:38:17 UTC

Description of problem: By default the overcloud deployment uses qemu instead of kvm, and it's not obvious from the documentation that this needs to be changed.


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


How reproducible: Always.


Steps to Reproduce:
1. Deploy to baremetal without specifying --libvirt-type kvm
2. Boot an instance.  It will use unaccelerated qemu.
3.

Actual results: Yugo performance from VM.


Expected results: Ferrari performance from VM.


Additional info: For RHOS 7 GA, this is likely a doc fix.  We should discuss whether to change the default in future releases, however.

Comment 4 Ben Nemec 2015-07-16 17:15:13 UTC

Note that this can be fixed after deployment by re-running the same deployment command with "--libvirt-type kvm" added.

Comment 6 Brent Eagles 2015-07-29 12:53:34 UTC

This is fairly critical and should be fixed as soon as practical. In addition to affecting performance, it prevents the use of features such as SR-IOV PCI passthrough.

Comment 7 Lennart Regebro 2015-08-24 10:53:21 UTC

Added a few doc improvements.

Comment 8 Lennart Regebro 2015-08-26 09:37:15 UTC

I also added a patch to change the default to KVM instead of QEMU, if it is decided that this is a bug that should be fixed.

https://review.gerrithub.io/#/c/244069

Comment 10 Lennart Regebro 2015-09-02 16:26:53 UTC

This bug needs documentation changes in any case, but we can also change the default from qemu to kvm, but I get conflicting opinions about if we should do that.

Comment 11 Stephen Gordon 2015-09-02 20:52:03 UTC

(In reply to Lennart Regebro from comment #10)
> This bug needs documentation changes in any case, but we can also change the
> default from qemu to kvm, but I get conflicting opinions about if we should
> do that.

WHY? We don't recommend the use of qemu emulation for real environments period from a Nova perspective.

Comment 12 chris alfonso 2015-09-02 21:02:51 UTC

There should no confusion any longer here. Default should be kvm. Thanks.

Comment 15 Marius Cornea 2015-09-07 14:13:31 UTC

[stack@instack ~]$ rpm -qa | grep python-rdomanager-oscplugin
python-rdomanager-oscplugin-0.0.10-1.el7ost.noarch

Deploy command: 

openstack overcloud deploy --templates 


Resulting config:
[heat-admin@overcloud-compute-0 ~]$ sudo grep virt_type /etc/nova/nova.conf | grep -v ^#
virt_type=kvm

Comment 17 errata-xmlrpc 2015-10-08 12:14:55 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/RHSA-2015:1862

Comment 18 Mike Burns 2015-10-15 16:19:13 UTC

*** Bug 1270397 has been marked as a duplicate of this bug. ***

Comment 19 Mike Burns 2015-10-15 16:21:13 UTC

*** Bug 1270396 has been marked as a duplicate of this bug. ***