[openstack-dev] [oslo.config][kolla] modular backends for oslo.cfg

Davanum Srinivas davanum at gmail.com
Thu Mar 19 15:48:20 UTC 2015



Ben added a topic "Alternative file formats for oslo.config" for
Liberty[1]. this would be great if we can talk about alternative
backends as well :)

-- dims

[1] https://etherpad.openstack.org/p/liberty-oslo-summit-planning

On Thu, Mar 19, 2015 at 8:31 AM, Chmouel Boudjnah <chmouel at chmouel.com> wrote:
> Hello,
> While on a long oversea flight with Sebastien Han we were talking how he had
> implemented ceph-docker with central configuration over etcd. We quickly
> came up to the conclusion that if we wanted to have that in Kolla it would
> be neat if it was done straight from oslo.config so that would quickly
> override the default keys in a central point.
> There is multiple advantage to use that method not just for containers but
> as well to avoid issues when orchestrating an openstack deployment.
> I have heard arguments that this should be the job of an ansible/puppet/chef
> tool and while I completely agree I just don't think it has to write to
> files the tool would just write to the etcd database.
> I have quickly came up with a quick and dirty POC on oslo.cfg here :
> https://github.com/chmouel/oslo.config/commit/01ee54dd5219b1434eaac422055b58e77694d89f
> and the demo :
> https://gist.github.com/chmouel/05fb715f96344161268c
> What others thinks about it ?
> I believe if we wanted to do that we would have to add a stevesdor based
> modular backend support directly to oslo.cfg first and have an etcd backend
> implemented.
> Chmouel
> PS: I am using etcd here cause it's easy and fancy but this could be any
> backends like a DB/NoSQL/Swift or whatever if we wanted
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Davanum Srinivas :: https://twitter.com/dims

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