Heat updates work pretty well and this is a right way to track all the
changes you do with your infrastructure. Heat declarative templates define
state of the OpenStack or any other application in a good, well designed
abstract form of resources and their dependencies. If you use Heat updates,
the sequence of Heat template diffs gives you the history of changes for
free. Heat updates approach is used in multiple projects like TripleO,
Murano, Solum and this is a proven way to control resources from a single
point of control. We use Heat updates in Murano for almost over the year
and we were able to cover almost every application life-cycle aspect with
Heat updates.

On Thu, Oct 2, 2014 at 2:51 PM, Zane Bitter <zbit...@redhat.com> wrote:

> Dredging up this thread because I was reminded of it today by a question
> on ask.openstack.org.
> On 18/07/14 09:19, Ayenson, Michael D. wrote:
>> Hello All,
>> My name is Mika Ayenson and I have to privilege to intern at Johns
>> Hopkins - Applied Physics Lab. I'm really excited to  release the latest
>> proof of concept "Re-Heat"  Re-Heat is a JHUAPL developed tool for
>> OpenStack users to help them quickly rebuild their OpenStack environments
>> via OpenStack's Heat .
>> Here is a link to the Re-Heat paper: https://drive.google.com/open?
>> id=0BzTq-ZB9F-b9b0ZXdy1PT2t3dk0&authuser=0
>> Here is a link to Re-Heat: https://github.com/Mikaayenson/ReHeat
>> I have included the abstract to our paper here:
> This makes me sad. Not because it isn't great work - I'm sure it is. It
> makes me sad because when I read statements like:
>  In the context of “entire lifecycle” management, Heat is the “create”
>> aspect of OpenStack orchestration.
> I realise that we have completely failed to communicate what Heat is :(
> To be clear, in the context of "entire lifecycle" management, Heat is the
> "entire lifecycle" aspect of OpenStack orchestration.
> I know I, and I suspect many of us, always hoped that this would be
> exactly the kind of application where Heat could make a difference, helping
> scientists to make their research more repeatable.
> Heat does that by allowing you to represent your infrastructure as code,
> and store it under version control. Messing with it behind Heat's back
> instead of by modifying the template is the infrastructure equivalent of
> connecting a debugger and messing with the machine code at runtime instead
> of changing the source. It's the opposite of repeatable. And developing
> tools to make using this broken pattern more convenient is a step in the
> wrong direction IMHO.
> I strongly recommend you try using the stack update mechanism instead.
> It's not perfect, but it's getting better all the time. We welcome any
> feedback you have.
> To be clear, I do think there is a really good use of this kind of
> technology, and it's the one that the Flame developers are targeting:
> bringing existing applications under Heat's management.
> cheers,
> Zane.
>  Abstract
>> OpenStack has experienced tremendous growth since its initial release
>> just over four years ago.  Many of the enhancements, such as the Horizon
>> interface and Heat, facilitate making complex network environment
>> deployments in the cloud from scratch easier.  The Johns Hopkins University
>> Applied Physics Lab (JHU/APL) has been using the OpenStack environment to
>> conduct research, host proofs-of-concepts, and perform testing &
>> experimentation.  Our experience reveals that during the environment
>> development lifecycle users and network architects are constantly changing
>> the environments (stacks) they originally deployed.  Once development has
>> reached a point at which experimentation and testing is prudent, scientific
>> methodology requires recursive testing be conducted to determine the
>> repetitiveness of the phenomena observed.  This requires the same entry
>> point (an identical environment) into the testing cycle.  Thus, it was
>> necessary to capture all the changes made to the initial !
> environmen
> t during the development phase and modify the original Heat template.
> However, OpenStack has not had a tool to help automate this process.  In
> response, JHU/APL developed a poof-of-concept automation tool called
> "Re-Heat," which this paper describes in detail.
>> I hope you all enjoy this as I have truly enjoyed playing with HEAT and
>> developing Re-Heat.
>> Cheers,
>> Mika Ayenson
>> _______________________________________________
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>> OpenStack-dev@lists.openstack.org
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
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Georgy Okrokvertskhov
OpenStack Platform Products,
Tel. +1 650 963 9828
Mob. +1 650 996 3284
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