[openstack-dev] [Nova][Scheduler] Policy Based Scheduler and Solver Scheduler

Sylvain Bauza sylvain.bauza at gmail.com
Tue Feb 11 18:12:44 UTC 2014


2014-02-11 18:28 GMT+01:00 Yathiraj Udupi (yudupi) <yudupi at cisco.com>:

>
>
>  Thanks for your pointers about Climate.  I will take a closer look at it
> and try it out.  So after a reservation lease for a VM is made by Climate,
> who acts on it to finally instantiate the VM ? Is it Climate or Nova should
> act on the lease to finally provision the VM.
>


That depends on the plugin mapped with the reservation type. The current
plugin mapped for virtual instances does unshelve the instance at lease
start (because Nova extension shelved it at lease creation).

If you don't like this behaviour, that's quite easy to create another
plugin for another reservation type. When the lease starts, it does run the
lease_create() action defined by the plugin. So, if you don't like
shelving/unshelving, that's not a problem, feel free to add a blueprint
about your needs or create your own plugin.

-Sylvain
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