Open Stack

Hi Jay,

Le 20/01/2014 17:34, Jay Pipes a écrit :
> On Mon, Jan 20, 2014 at 11:18 AM, Sylvain Bauza 
> <sylvain.bauza at bull.net <mailto:sylvain.bauza at bull.net>> wrote:
>
>     Jay, please be aware of the existence of Climate, which is a
>     Stackforge project for managing dedicated resources (like AWS
>     reserved instances). This is not another API extension, but
>     another API endpoint for creating what we call "leases" which can
>     be started now or in the future and last for a certain amount of
>     time. We personnally think there is a space for Reservations in
>     Openstack, and this needs to be done as a service.
>
>
> Hi Sylvain! Hope all is well with you :)

Thanks, doing well but a bit under pressure, as Climate has its 0.1 
milestone this week...

>
> So, I actually don't think the two concepts (reservations and 
> "isolated instances") are competing ideas. Isolated instances are 
> actually not reserved. They are simply instances that have a condition 
> placed on their assignment to a particular compute node that the node 
> must only be hosting other instances of one or more specified projects 
> (tenants).
>

I got your idea. This filter [1] already does most of the work, although 
it relies on aggregates and requires admin management. The main issue 
with isolated instances is that it requires kind of capacity planning 
for making sure you can cope with the load, that's why we placed the 
idea of having such a placement scheduler.

[1] : 
https://github.com/openstack/nova/blob/master/nova/scheduler/filters/aggregate_multitenancy_isolation.py 

> Best,
> -jay
>
>
>
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