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Last week I was tinkering with my docker configuration a bit and was a
bit surprised that puppet/services/docker.yaml no longer used puppet to
configure the docker daemon. It now uses Ansible [1] which is very cool
but brings up the question of how should we clearly indicate to
developers and users that we are using Ansible vs Puppet for
configuration?

TripleO has been around for a while now, has supported multiple
configuration ans service types over the years: os-apply-config,
puppet, containers, and now Ansible. In the past we've used rigid
directory structures to identify which "service type" was used. More
recently we mixed things up a bit more even by extending one service
type from another ("docker" services all initially extended the
"puppet" services to generate config files and provide an easy upgrade
path).

Similarly we now use Ansible all over the place for other things in
many of or docker and puppet services for things like upgrades. That is
all good too. I guess the thing I'm getting at here is just a way to
cleanly identify which services are configured via Puppet vs. Ansible.
And how can we do that in the least destructive way possible so as not
to confuse ourselves and our users in the process.

Also, I think its work keeping in mind that TripleO was once a multi-
vendor project with vendors that had different preferences on service
configuration. Also having the ability to support multiple
configuration mechanisms in the future could once again present itself
(thinking of Kubernetes as an example). Keeping in mind there may be a
conversion period that could well last more than a release or two.

I suggested a 'services/ansible' directory with mixed responces in our
#tripleo meeting this week. Any other thoughts on the matter?

Thanks,

Dan

[1] http://git.openstack.org/cgit/openstack/tripleo-heat-templates/comm
it/puppet/services/docker.yaml?id=00f5019ef28771e0b3544d0aa3110d5603d7c
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