openstack team mailing list archive

[Vishvananda Ishaya <vishvananda@xxxxxxxxx>]

On Apr 10, 2012, at 3:04 PM, Justin Santa Barbara wrote:

> Having the ability to read config data from a runtime changeable
> metadata server (rather then a config file on an injected disk) serves a
> use case I am interested in.  The only problem is horizontal scalability
> of the metadata server in this model which may not be a problem with
> some tinkering.
> 
> Can you please share that use case?  I'm especially interested in finding use cases that would not better be better served by e.g. SSH or Zookeeper or Corosync..

One advantage of a network metadata channel is it allows for communication with cloud provider services without having to put a key into the vm. In other words, the vm can be authenticated via its ipv6 address.

Vish