Hey Pavlov,
The main aim of this effort is to allow a more efficient template catalog
management, not unlike what is given in [2]. As a service to our customers,
Rackspace maintains a catalog of useful templates[3] which are also exposed to
the user through the UI. The template authors of these templates had expressed
difficulties in having to maintain several templates depending on resource
availability, account-type etc., so they asked for the ability to use Jinja
templating system to instead include everything in one Heat meta-template
(Heat Template + Jinja, I’m not sure if that term is used for something else
already :-) ). e.g. [4] shows a very simple case of having to choose between
two templates depending upon the availability of Neutron on the network.
I hope that clarifies things a bit. Let me know if you have more questions!
Thanks!
-Pratik
[3] https://github.com/rackspace-orchestration-templates
[4]
https://github.com/rackspace-orchestration-templates/jinja-test/blob/master/jinja-test.yaml
On Feb 2, 2015, at 1:44 PM, Pavlo Shchelokovskyy
pshchelokovs...@mirantis.commailto:pshchelokovs...@mirantis.com wrote:
Hi Pratik,
what would be the aim for this templating? I ask since we in Heat try to keep
the imperative logic like e.g. if-else out of heat templates, leaving it to
other services. Plus there is already a spec for a heat template function to
repeat pieces of template structure [1].
I can definitely say that some other OpenStack projects that are consumers of
Heat will be interested - Trove already tries to use Jinja templates to create
Heat templates [2], and possibly Sahara and Murano might be interested as well
(I suspect though the latter already uses YAQL for that).
[1] https://review.openstack.org/#/c/140849/
[2]
https://github.com/openstack/trove/blob/master/trove/templates/default.heat.template
Best regards,
Pavlo Shchelokovskyy
Software Engineer
Mirantis Inc
www.mirantis.comhttp://www.mirantis.com/
On Mon, Feb 2, 2015 at 8:29 PM, Pratik Mallya
pratik.mal...@rackspace.commailto:pratik.mal...@rackspace.com wrote:
Hello Heat Developers,
As part of an internal development project at Rackspace, I implemented a
mechanism to allow using Jinja templating system in heat templates. I was
hoping to give a talk on the same for the upcoming summit (which will be the
first summit after I started working on openstack). Have any of you worked/ are
working on something similar? If so, could you please contact me and we can
maybe propose a joint talk? :-)
Please let me know! It’s been interesting work and I hope the community will be
excited to see it.
Thanks!
-Pratik
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