[Openstack] [nova] Libvirt driver domain metadata - add instance metadata dictionary?

Matt Riedemann mriedem at linux.vnet.ibm.com
Fri Aug 1 20:47:48 UTC 2014

On 7/31/2014 6:58 AM, Markus Zoeller wrote:
> The blueprint "libvirt-driver-domain-metadata" introduces some of the
> istances properties to the `libvirt.xml` file. For example the name
> of the instance, the name of the flavor and the creation date.
> Would it make sense to add the instance.metadata dictionary also?
> API: /v2/​{tenant_id}​/servers/​{server_id}​/metadata
> Code: https://github.com/openstack/nova/blob/master/
>        nova/objects/instance.py#L148
> Regards,
> Markus
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You could ask danpb in #openstack-nova IRC about his thoughts, but 
looking at the spec and code it looks like a specific metadata schema 
was in mind.  The metadata that a user can pass in when spawning an 
instance is arbitrary so it wouldn't really fit into the schema created 
unless that was modified to add some custom values, which would be the 
user metadata.

Is there a use case for putting user metadata in there?  Looks like the 
blueprint is for adding specific metadata so an admin can correlate his 
libvirt domains against nova API calls.



Matt Riedemann

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