Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread Jesse Pretorius
On 27 March 2014 20:52, Chris Friesen chris.frie...@windriver.com wrote: It'd be nice to be able to do a heat template where you could specify things like put these three servers on separate hosts from each other, and these other two servers on separate hosts from each other (but maybe on the

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread Day, Phil
Personally, I feel it is a mistake to continue to use the Amazon concept of an availability zone in OpenStack, as it brings with it the connotation from AWS EC2 that each zone is an independent failure domain. This characteristic of EC2 availability zones is not enforced in OpenStack Nova or

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread Belmiro Moreira
+1 for Phil comments. I agree that VMs should spread between different default avzs if user doesn't define one at boot time. There is a blueprint for that feature that unfortunately didn't make it for icehouse. https://blueprints.launchpad.net/nova/+spec/schedule-set-availability-zones Belmiro

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread Jay Pipes
On Fri, 2014-03-28 at 13:56 +0100, Belmiro Moreira wrote: +1 for Phil comments. I agree that VMs should spread between different default avzs if user doesn't define one at boot time. There is a blueprint for that feature that unfortunately didn't make it for icehouse.

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread Jay Pipes
On Fri, 2014-03-28 at 11:01 +, Day, Phil wrote: Personally, I feel it is a mistake to continue to use the Amazon concept of an availability zone in OpenStack, as it brings with it the connotation from AWS EC2 that each zone is an independent failure domain. This characteristic of EC2

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread CARVER, PAUL
Jay Pipes wrote: I'm proposing getting rid of the host aggregate hack (or maybe evolving it?) as well as the availability zone concept and replacing them with a more flexible generic container object that may be hierarchical in nature. Is the thing you're proposing to replace them with something

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread Jay Pipes
On Fri, 2014-03-28 at 19:38 +, CARVER, PAUL wrote: Jay Pipes wrote: I'm proposing getting rid of the host aggregate hack (or maybe evolving it?) as well as the availability zone concept and replacing them with a more flexible generic container object that may be hierarchical in nature.

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-28 Thread Chris Friesen
On 03/28/2014 05:01 AM, Jesse Pretorius wrote: On 27 March 2014 20:52, Chris Friesen chris.frie...@windriver.com mailto:chris.frie...@windriver.com wrote: It'd be nice to be able to do a heat template where you could specify things like put these three servers on separate hosts from

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Sylvain Bauza
@lists.openstack.org mailto:openstack-dev@lists.openstack.org Date: Wednesday, March 26, 2014 at 1:34 PM To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.org mailto:openstack-dev@lists.openstack.org Subject: Re: [openstack-dev] [nova][scheduler

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Khanh-Toan Tran
- Original Message - From: Sangeeta Singh sin...@yahoo-inc.com To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.org Sent: Wednesday, March 26, 2014 6:54:18 PM Subject: Re: [openstack-dev] [nova][scheduler] Availability Zones and Host

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Jérôme Gallard
Mailing List (not for usage questions) openstack-dev@lists.openstack.org Sent: Wednesday, March 26, 2014 6:54:18 PM Subject: Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. On 3/26/14, 10:17 AM, Khanh-Toan Tran khanh-toan.t...@cloudwatt.com wrote

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Khanh-Toan Tran
: OpenStack Development Mailing List (not for usage questions) Objet : Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. Hi Toan, Is what you say related to : https://blueprints.launchpad.net/nova/+spec/schedule-set-availability-zone s ? 2014-03-27 10:37 GMT+01:00

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Khanh-Toan Tran
-Message d'origine- De : Sylvain Bauza [mailto:sylvain.ba...@bull.net] Envoyé : jeudi 27 mars 2014 11:05 À : OpenStack Development Mailing List (not for usage questions) Objet : Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. Le 27/03/2014 10:37

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Day, Phil
used to working with AWS) expects from an AZ -Original Message- From: Chris Friesen [mailto:chris.frie...@windriver.com] Sent: 27 March 2014 13:18 To: openstack-dev@lists.openstack.org Subject: Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Day, Phil
The need arises when you need a way to use both the zones to be used for scheduling when no specific zone is specified. The only way to do that is either have a AZ which is a superset of the two AZ or the other way could be if the default_scheduler_zone can take a list of zones instead

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Chris Friesen
On 03/27/2014 11:48 AM, Day, Phil wrote: Sorry if I'm coming late to this thread, but why would you define AZs to cover othognal zones ? See Vish's first message. AZs are a very specific form of aggregate - they provide a particular isolation schematic between the hosts (i.e. physical hosts

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Day, Phil
-Original Message- From: Vishvananda Ishaya [mailto:vishvana...@gmail.com] Sent: 26 March 2014 20:33 To: OpenStack Development Mailing List (not for usage questions) Subject: Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. On Mar 26, 2014, at 11:40

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Day, Phil
-Original Message- From: Chris Friesen [mailto:chris.frie...@windriver.com] Sent: 27 March 2014 18:15 To: openstack-dev@lists.openstack.org Subject: Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. On 03/27/2014 11:48 AM, Day, Phil wrote: Sorry

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Chris Friesen
On 03/27/2014 12:28 PM, Day, Phil wrote: Personally I'm a bit worried about users having too fine a granularity over where they place a sever - AZs are generally few and big so you can afford to allow this and not have capacity issues, but if I had to expose 40 different rack based zones it

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Sangeeta Singh
On 3/27/14, 11:03 AM, Day, Phil philip@hp.com wrote: The need arises when you need a way to use both the zones to be used for scheduling when no specific zone is specified. The only way to do that is either have a AZ which is a superset of the two AZ or the other way could be if

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Chris Friesen
On 03/27/2014 12:49 PM, Day, Phil wrote: -Original Message- From: Chris Friesen [mailto:chris.frie...@windriver.com] On 03/27/2014 11:48 AM, Day, Phil wrote: nova boot --availability-zone az1 --scheduler-hint want-fast-cpu --scheduler-hint want-ssd ... Does this actually work?

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-27 Thread Duncan Thomas
On Mar 26, 2014 6:46 PM, Jay Pipes jaypi...@gmail.com wrote: Personally, I feel it is a mistake to continue to use the Amazon concept of an availability zone in OpenStack, as it brings with it the connotation from AWS EC2 that each zone is an independent failure domain. This characteristic of

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread John Garbutt
Sounds like an extra weighter to try and balance load between your two AZs might be a nicer way to go. The easiest way might be via cells, one for each AZ . But not sure we merged that support yet. But there are patches for that. John On 25 Mar 2014 20:53, Sangeeta Singh sin...@yahoo-inc.com

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Baldassin, Santiago B
: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. Sounds like an extra weighter to try and balance load between your two AZs might be a nicer way to go. The easiest way might be via cells, one for each AZ . But not sure we merged that support yet. But there are patches

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Chris Friesen
On 03/25/2014 02:50 PM, Sangeeta Singh wrote: What I am trying to achieve is have two AZ that the user can select during the boot but then have a default AZ which has the HV from both AZ1 AND AZ2 so that when the user does not specify any AZ in the boot command I scatter my VM on both the AZ

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Vishvananda Ishaya
Personally I view this as a bug. There is no reason why we shouldn’t support arbitrary grouping of zones. I know there is at least one problem with zones that overlap regarding displaying them properly: https://bugs.launchpad.net/nova/+bug/1277230 There is probably a related issue that is

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Chris Friesen
On 03/26/2014 10:47 AM, Vishvananda Ishaya wrote: Personally I view this as a bug. There is no reason why we shouldn’t support arbitrary grouping of zones. I know there is at least one problem with zones that overlap regarding displaying them properly:

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Khanh-Toan Tran
- Original Message - From: Sangeeta Singh sin...@yahoo-inc.com To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.org Sent: Tuesday, March 25, 2014 9:50:00 PM Subject: [openstack-dev] [nova][scheduler] Availability Zones and Host

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Sangeeta Singh
To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.orgmailto:openstack-dev@lists.openstack.org Subject: Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. I would say that the requirement is not valid. A host aggregate con only have

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Sangeeta Singh
On 3/26/14, 10:17 AM, Khanh-Toan Tran khanh-toan.t...@cloudwatt.com wrote: - Original Message - From: Sangeeta Singh sin...@yahoo-inc.com To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.org Sent: Tuesday, March 25, 2014 9:50:00 PM

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Sangeeta Singh
On 3/26/14, 10:17 AM, Khanh-Toan Tran khanh-toan.t...@cloudwatt.com wrote: - Original Message - From: Sangeeta Singh sin...@yahoo-inc.com To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.org Sent: Tuesday, March 25, 2014 9:50:00 PM

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Chris Friesen
On 03/26/2014 11:17 AM, Khanh-Toan Tran wrote: I don't know why you need a compute node that belongs to 2 different availability-zones. Maybe I'm wrong but for me it's logical that availability-zones do not share the same compute nodes. The availability-zones have the role of partition your

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Jay Pipes
On Wed, 2014-03-26 at 09:47 -0700, Vishvananda Ishaya wrote: Personally I view this as a bug. There is no reason why we shouldn’t support arbitrary grouping of zones. I know there is at least one problem with zones that overlap regarding displaying them properly:

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Sangeeta Singh
Yes, Vish description describes the uses cases and the need for multiple overlapping availability zones nicely. If multiple availability zone can be specified in the launch command that will allow End user to select hosts that satisfy all there constraints. Thanks, Sangeeta On 3/26/14, 11:00

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Vishvananda Ishaya
On Mar 26, 2014, at 11:40 AM, Jay Pipes jaypi...@gmail.com wrote: On Wed, 2014-03-26 at 09:47 -0700, Vishvananda Ishaya wrote: Personally I view this as a bug. There is no reason why we shouldn’t support arbitrary grouping of zones. I know there is at least one problem with zones that

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Sylvain Bauza
I can't agree more on this. Although the name sounds identical to AWS, Nova AZs are *not* for segregating compute nodes, but rather exposing to users a certain sort of grouping. Please see this pointer for more info if needed :

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Sangeeta Singh
@lists.openstack.orgmailto:openstack-dev@lists.openstack.org Date: Wednesday, March 26, 2014 at 1:34 PM To: OpenStack Development Mailing List (not for usage questions) openstack-dev@lists.openstack.orgmailto:openstack-dev@lists.openstack.org Subject: Re: [openstack-dev] [nova][scheduler] Availability

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Jay Pipes
On Wed, 2014-03-26 at 13:33 -0700, Vishvananda Ishaya wrote: On Mar 26, 2014, at 11:40 AM, Jay Pipes jaypi...@gmail.com wrote: On Wed, 2014-03-26 at 09:47 -0700, Vishvananda Ishaya wrote: Personally I view this as a bug. There is no reason why we shouldn’t support arbitrary grouping of

Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

2014-03-26 Thread Jay Pipes
) openstack-dev@lists.openstack.org Date: Wednesday, March 26, 2014 at 4:45 PM To: openstack-dev@lists.openstack.org openstack-dev@lists.openstack.org Subject: Re: [openstack-dev] [nova][scheduler] Availability Zones and Host aggregates.. On Wed, 2014-03-26 at 13:33 -0700