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On 07/09/2013 07:42 PM, Angus Salkeld wrote:
> On 09/07/13 11:59 -0400, Eoghan Glynn wrote:
>>
>> Hi Folks,
>>
>> Just wondering to what extent Heat deployment policies can be made
>> nova cell/AZ-aware?
>>
>> For example, one could envisage a situation in which it would sense
>> for an autoscaling group to have cell-affinity, but also have AZ-
>> anti-affinity within the cell for resiliance against datacenter
>> outages.
>>
>> Are those kinds of policies currently supported by Heat?
> 
> No.

It seems like the planned instance grouping additions to nova in Havana
would be helpful here.

https://blueprints.launchpad.net/nova/+spec/instance-group-api-extension

This will provide the ability to express to nova that multiple instances
are in a group, and that a policy should be applied to this group, such
as various types of affinity or anti-affinity.

-- 
Russell Bryant