[openstack-dev] [TripleO] a small experiment with Ansible in TripleO

Clint Byrum clint at fewbar.com
Mon Aug 4 15:19:43 UTC 2014

I've been fiddling on github. This repo is unfortunately named the same
but is not the same ancestry as yours. Anyway, the branch 'fiddling' has
a working Heat inventory plugin which should give you a hostvar of
'heat_metadata' per host in the given stack.


Note that in the root there is a 'heat-ansible-inventory.conf' that is
an example config (works w/ devstack) to query a heat stack and turn it
into an ansible inventory. That uses oslo.config so all of the usual
patterns for loading configs in openstack should apply.

Excerpts from Allison Randal's message of 2014-08-01 09:07:44 -0700:
> A few of us have been independently experimenting with Ansible as a
> backend for TripleO, and have just decided to try experimenting
> together. I've chatted with Robert, and he says that TripleO was always
> intended to have pluggable backends (CM layer), and just never had
> anyone interested in working on them. (I see it now, even in the early
> docs and talks, I guess I just couldn't see the forest for the trees.)
> So, the work is in line with the overall goals of the TripleO project.
> We're starting with a tiny scope, focused only on updating a running
> TripleO deployment, so our first work is in:
> - Create an Ansible Dynamic Inventory plugin to extract metadata from Heat
> - Improve/extend the Ansible nova_compute Cloud Module (or create a new
> one), for Nova rebuild
> - Develop a minimal handoff from Heat to Ansible, particularly focused
> on the interactions between os-collect-config and Ansible
> We're merging our work in this repo, until we figure out where it should
> live:
> https://github.com/allisonrandal/tripleo-ansible
> We've set ourselves one week as the first sanity-check to see whether
> this idea is going anywhere, and we may scrap it all at that point. But,
> it seems best to be totally transparent about the idea from the start,
> so no-one is surprised later.
> Cheers,
> Allison

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