[Openstack-operators] set max number of instances per compute node

Michael J Fork mjfork at us.ibm.com
Wed Jan 18 18:29:51 UTC 2012


I was able to get it to work by downloading the hardware.py file to 
site-packages/nova/scheduler/hardware.py and setting the scheduler_driver 
in nova.conf

--scheduler_driver=nova.scheduler.hardware.HardwareScheduler

Michael

-------------------------------------------------
Michael Fork
Cloud Architect, Emerging Solutions
IBM Systems & Technology Group



From:   <J.O'Loughlin at surrey.ac.uk>
To:     <diego.parrilla.santamaria at gmail.com>
Cc:     openstack-operators at lists.openstack.org
Date:   01/18/2012 12:28 PM
Subject:        Re: [Openstack-operators] set max number of instances per 
compute node
Sent by:        openstack-operators-bounces at lists.openstack.org




Thanks,

What options would I need to set in nova.conf to change the scheduler to 
this?

Regards

John O'Loughlin
FEPS IT, Service Delivery Team Leader
________________________________________
From: Diego Parrilla Santamaría [diego.parrilla.santamaria at gmail.com]
Sent: 18 January 2012 16:50
To: O'Loughlin JF Mr (FEPS Faculty Admin)
Cc: fifieldt at unimelb.edu.au; openstack-operators at lists.openstack.org
Subject: Re: [Openstack-operators] set max number of instances per compute 
node

Everett Toews wrote something really sexy a couple of months ago:

https://github.com/canarie/dair/blob/master/OpenStack/misc/hardware.py

May be you can give it good use!

--
Diego Parrilla
<http://www.stackops.com/>CEO
www.stackops.com<http://www.stackops.com/> |  diego.parrilla at stackops.com<
mailto:diego.parrilla at stackops.com> | +34 649 94 43 29 | 
skype:diegoparrilla
<http://www.stackops.com/>





On Wed, Jan 18, 2012 at 5:33 PM, <J.O'Loughlin at surrey.ac.uk<
mailto:J.O%27Loughlin at surrey.ac.uk>> wrote:

Are there any docs on configuring the various schedulers? I'm  putting 
together a test cloud, and have a variety of different servers.

Regards

John O'Loughlin
FEPS IT, Service Delivery Team Leader
________________________________________
From: Diego Parrilla Santamaría [diego.parrilla.santamaria at gmail.com<
mailto:diego.parrilla.santamaria at gmail.com>]
Sent: 18 January 2012 16:28
To: O'Loughlin JF Mr (FEPS Faculty Admin)
Cc: fifieldt at unimelb.edu.au<mailto:fifieldt at unimelb.edu.au>; 
openstack-operators at lists.openstack.org<
mailto:openstack-operators at lists.openstack.org>
Subject: Re: [Openstack-operators] set max number of instances per compute 
node

Correct me if I'm wrong, but this parameter is used by the 
SimpleScheduler, so it must be in the configuration file used by 
nova-scheduler.

Cheers
Diego

--
Diego Parrilla
<http://www.stackops.com/>CEO
www.stackops.com<http://www.stackops.com><http://www.stackops.com/> | 
diego.parrilla at stackops.com<mailto:diego.parrilla at stackops.com><
mailto:diego.parrilla at stackops.com<mailto:diego.parrilla at stackops.com>> | 
+34 649 94 43 29<tel:%2B34%20649%2094%2043%2029> | skype:diegoparrilla
<http://www.stackops.com/>

[http://stackops.s3-external-3.amazonaws.com/STACKOPSLOGO-ICON.png]




On Wed, Jan 18, 2012 at 4:57 PM, <J.O'Loughlin at surrey.ac.uk<
mailto:J.O%27Loughlin at surrey.ac.uk><mailto:J.O%27Loughlin at surrey.ac.uk<
mailto:J.O%2527Loughlin at surrey.ac.uk>>> wrote:

Thanks,

I added this as an option to nova.conf on one of my compute nodes and 
doesn't work. Does it need to be set on the scheduler host? if so, is it 
possible to set different values for different compute hosts?

Regards

John O'Loughlin
FEPS IT, Service Delivery Team Leader
________________________________________
From: openstack-operators-bounces at lists.openstack.org<
mailto:openstack-operators-bounces at lists.openstack.org><
mailto:openstack-operators-bounces at lists.openstack.org<
mailto:openstack-operators-bounces at lists.openstack.org>> 
[openstack-operators-bounces at lists.openstack.org<
mailto:openstack-operators-bounces at lists.openstack.org><
mailto:openstack-operators-bounces at lists.openstack.org<
mailto:openstack-operators-bounces at lists.openstack.org>>] On Behalf Of Tom 
Fifield [fifieldt at unimelb.edu.au<mailto:fifieldt at unimelb.edu.au><
mailto:fifieldt at unimelb.edu.au<mailto:fifieldt at unimelb.edu.au>>]
Sent: 18 January 2012 12:53
To: openstack-operators at lists.openstack.org<
mailto:openstack-operators at lists.openstack.org><
mailto:openstack-operators at lists.openstack.org<
mailto:openstack-operators at lists.openstack.org>>
Subject: Re: [Openstack-operators] set max number of instances per compute 
node

http://docs.openstack.org/diablo/openstack-compute/admin/content/reference-for-flags-in-nova-conf.html


--max_cores     default: '16'   Integer value; Maximum number of instance
cores to allow per compute host.

Regards,

Tom

On 18/01/12 23:05, J.O'Loughlin at surrey.ac.uk<
mailto:J.O%27Loughlin at surrey.ac.uk><mailto:J.O%27Loughlin at surrey.ac.uk<
mailto:J.O%2527Loughlin at surrey.ac.uk>> wrote:
>
> All,
>
> is there a way to set the maximum number of instances or cores that can 
be used on a compute node? (similar to the max_cores option in eucalyptus)
>
> I'm running diablo.
>
> Regards
>
> John O'Loughlin
> FEPS IT, Service Delivery Team Leader
> _______________________________________________
> Openstack-operators mailing list
> Openstack-operators at lists.openstack.org<
mailto:Openstack-operators at lists.openstack.org><
mailto:Openstack-operators at lists.openstack.org<
mailto:Openstack-operators at lists.openstack.org>>
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>

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