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On 7/31/2015 9:27 AM, Pradeep Kiruvale wrote:
> Hi All,
>
>
> I am new to openstack. I have a problem in understanding of
> Nova-database update with the resources information.
>
> My understanding after going through the architecture documents and code
> is Nova-Database is the one which stores the resource information about
> the compute servers. The Nova-Scheduler is responsible to place a VM on
> a correct compute node where the resources are available. Nova-compute
> is responsible for creating the VMs/Containers etc.
>
> The question here is who actually updates the in real time the resource
> information in the Nova-Database by reading the resources information
> from the compute servers/nodes?
>
> I have read about agents are responsible for this, but I dint get which
> code does that. Can any one please help me in clarifying my doubt and
> please guide me for the code  which does that.
>
>
> Thanks in advance
>
> Cheers,
> Pradeep
>
>
>
>
>
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Mostly nova-conductor but sometimes also nova-api.  Pretty much anything 
that imports nova.db.api.

This might be helpful:

http://docs.openstack.org/developer/nova/architecture.html?highlight=architecture

-- 

Thanks,

Matt Riedemann