[openstack-dev] [Scheduler] New scheduler feature - VM Ensembles

Alex Glikson GLIKSON at il.ibm.com
Thu Jan 10 14:42:07 UTC 2013

Steven Hardy <shardy at redhat.com> wrote on 10/01/2013 02:17:26 PM:
> On Tue, Jan 08, 2013 at 07:00:17PM +0000, JC Martin wrote:
> [...] but I would prefer that the basic notion of VM 
> group be implemented in Nova, with the right scheduling support, so 
> that it can be available without having Heat deployed and can also 
> be exposed in Horizon more easily.
> It seems to me that most of what you propose could be achieved with the
> addition of "instance groups" to nova, combined with some new scheduler
> hints which allow you to specify instance anti-affinity for hosts,
> host-aggregates or availability zones.

Definitely, the ability to express groups of instances is important, but 
it would make sense at least to start with a more simplistic approach, 
like the one proposed above.
We would be interested to contribute to development of such a feature.

Alex Glikson
IBM Research

> -- 
> Steve Hardy
> Red Hat Engineering, Cloud
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