[Container-tools] Nulecule/AtomicApp BoF at OSCon

[Aaron Weitekamp]

On Tue, Jul 28, 2015 at 10:37 AM, John Mark Walker <johnmark at redhat.com>
wrote:

>
> On Jul 28, 2015 9:25 AM, Daniel J Walsh <dwalsh at redhat.com> wrote:
> >
> >
> >
> > On 07/28/2015 08:43 AM, James Shubin wrote:
> >>
> >> On Mon, 2015-07-27 at 20:07 -0400, Langdon White wrote:
> >>>
> >>> However, I wanted to bring up one thing which came up. One of the
> people
> >>>
> >>> asked me "how is this different from config mgmt a la chef". While I
> >>>
> >>> know in my head it is different,
> >>>
> >> I agree...
> >>
> >>
> >>
> >>>  and potentially even a wrapper around
> >>>
> >>> config mgmt, I was struggling with articulating a clear/concise
> answer.
> >>>
> >>> As a result, I thought I would raise it to the list.
> >>>
>
> This is perhaps the big question we need to answer.
>
> >>>
> >>>
> >>> Included James Shubin (who may already be subscribed) as the most
> >>>
> >>> expert-y config mgmt person I know for his perspective.
> >>>
> >> I've thought about this, and the short answer is that it's a long
> >>
> >> answer. Here's the shortest version:
> >>
> >>
> >>
> >> They're different, but only because IMO, the config management tools
> >>
> >> which would solve this problem elegantly, don't currently exist ATM.
> >>
> >>
> >>
> >> Assuming it doesn't offend anyone, I see Nulecule as a stop-gap until
> >>
> >> config management learns how to better build multi-container
> >>
> >> applications. This won't happen for at least a year. Assuming I'm wrong,
> >>
> >> please excuse this due to my lack of knowledge into some of the Nulecule
> >>
> >> specifics.
>
> To be fair, nulecule should be viewed independently of atomic. As in,
> nulecule could be used by config management tools to define cloud native
> apps.
>
> >>
> >>
> >>
> >> Container-tools at redhat.com
> >>
> >> https://www.redhat.com/mailman/listinfo/container-tools
> >>
> > atomic +labels (install, run, uninstall) allows an developer to define
> how his application runs inside of the Open Container Format.
> > Nulecule allows the define how Multi-Container applications can be
> run/installed, and then allows the developer a standard format
> > to ask administrators for additional configuration data like how my
> replicas of each service would they like.
> >
> > Orchestration tools can than take advantage of this tooling to spread
> the application throughout the environment.
> >
> > Daniel Riek could probably expand on this.
>
> Aaron W also had some thoughts on this, I believe - Aaron?
>

​I agree with Dan's summary. I think we should stick with a pretty simple
story. It's a generalized installation pattern for container apps. Like any
good installer you can pass in parameters. Like any installer it can be
incorporated into other tools and workflows or used stand-alone.

-Aaron


> -JM
>
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