[openstack-dev] Nova config drive rebuilding

Robert Collins robertc at robertcollins.net
Wed Aug 7 06:25:47 UTC 2013

On 7 August 2013 18:08, Uri Simchoni <uri_simchoni at hotmail.com> wrote:
> Hi,
> As far as I can tell (from testing and looking at the code, at least for libvirt driver), the config drive is not rebuilt after initial spawning (except for some migration scenarios), which means the guest cannot see updates to its metadata.
> Is this a valid statement, and would it make sense to have the disk rebuilt on events such as suspend/resume or stop/start?

Thats certainly my understanding and one of the reasons I dislike it :).

Being able to update it when the guest is restarted would be an
improvement IMO - but note that the EC2 metadata service is largely
static too; thats something I'd like to see us change (e.g. making ssh
keys more dynamic)... but thats a different story.

I suggest putting a blueprint together, as the exact places where it's
safe to update an instance-mounted image will need careful

Robert Collins <rbtcollins at hp.com>
Distinguished Technologist
HP Converged Cloud

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