[openstack-dev] [nova] do not account compute resource of instances in state SHELVED_OFFLOADED

Christian Berendt christian at berendt.io
Tue Jan 26 12:46:40 UTC 2016

After offloading a shelved instance the freed compute resources are 
still accounted.

I think it makes sense to make this behavior configurable. We often have 
the request to not account the freed compute resources after an 
instances was offloaded to be able to spawn new instances or to 
unshelved offloaded instances even the assigned compute resource quota 
was archieved.

Because the instance are shelved and offloaded they do not occupy 
compute resource and it is often safe to allow the freed compute 
resources for other inststances. Of coure it has to be checked if there 
are enough free compute resource when trying to unshelve an offloaded 

What do you thin about this use case? If it make sense to you I want to 
propose to write a spec for this feature.


Christian Berendt
Cloud Solution Architect
Mail: berendt at b1-systems.de

B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537

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