[openstack-dev] [tc] [heat] [murano] [app-catalog] OpenStack Apps Community, several suggestions how to improve collaboration

Sergey Kraynev skraynev at mirantis.com
Tue May 31 16:20:22 UTC 2016

Hi Infra, Murano and App Catalog teams.

We discussed in some more details plan suggested below with App Catalog,
Murano and (partially) Infra team regarding moving repositories with source
code of Murano applications out of area of responsibility of Murano core

***** *First part related with changes in existing Murano repository and*
important for Murano App developers *****

Decision was made to:
- create new gerrit groups for review/release/test repository, namely -
- don't rename murano-apps project and repository, just assign team above
as owners (murano-apps-core)

Previous owner of this project (murano-core) will be part of new group to
continue sharing expertise in Murano with this new team and help them going

There is patch on review for it: https://review.openstack.org/#/c/323340/3

Separation of murano-apps from Murano is the first step in separating work
with Murano applications from work with Murano core project.

***** *Second part related with changes with future repositories and*
important for Openstack Infra team *****
JFYI, what we plan to do as next steps.

Murano team will re-create some applications in their repositories using
name murano-examples, as reference implementation of some of the
applications which Murano team decides to keep in their project for
reference. This can be done by Murano team, no external help needed.

Some of the applications (complicated and big applications like CI/CD
pipeline or Kubernetes cluster) will have their own repositories in the
future under openstack/. Actually CI/CD pipeline already lives in separated
repository, probably Kubernetes should be also moved to separated repo
going forward. Hopefully this shouldn't be a big deal for OpenStack Infra
*However* we would like to get confirmation, that *Infra team* is ok with

Suggestion is to use common template for names of repositories with Murano
applications in the future, namely openstack/murano-app-...
(openstack/murano-app-kubernetes, openstack/murano-app-docker, ...). We'll
describe overall approach in more details using
https://launchpad.net/murano-apps as entry point.

Simple applications or applications where there is no active development
will keep being stored in murano-apps until there is a demand to move some
of them to separated repository. At that point we'll ask OpenStack Infra
team to do it.

We hope that this will help to clearly identify area of responsibility
around development of Murano applications, helping to onboard new
contributors/teams using mostly efforts of Murano Apps team. I.e. creation
of new application in murano-apps repository means in this model just
creation of new directory with new application, which can be done by
murano-apps team on their own. In this case we'll need to understand how to
organize CI for different applications being stored in the same repository
but I think we'll figure it out, it's not a blocker.

This model allows us to ask for involvement of OpenStack Infra team only in
rare cases when there is a need to create separate repository for
especially big and complicated Murano Application which should be treated
as a dedicated project with its own development team and CI.

Any suggestions, questions are welcome!!!!

On 25 May 2016 at 14:37, Igor Marnat <imarnat at mirantis.com> wrote:

> Colleagues,
> having attended many sessions and talked to many customers, partners
> and contributors in Austin I’d like to suggest several improvements to how
> we develop OpenStack apps and work with the Community App Catalog (
> https://apps.openstack.org/).
> Key goals to achieve are:
> - Provide contributors with an ability to collaborate on OpenStack
> apps development
> - Provide contributors and consumers with transparent workflow to
> manage their apps
> - Provide consumers with information about apps - how it was developed
> and tested
> - To summarize - introduce the way to build community working on
> OpenStack apps
> *What is OpenStack application*
> OpenStack is about 6 years young and all these years discussions about
> it are in progress. Variety of applications is huge, from LAMP stacks
> and legacy Java apps to telco workloads and VNF apps. There is working
> group which works on a definition of "What is OpenStack application",
> hopefully community will agree on definition soon.
> For the sake of our discussion below let us agree on a simple approach:
> an OpenStack application is any software asset which 1. can be executed on
> an OpenStack cloud, 2. lives in apps.openstack.org.  So far there are
> Murano applications, Heat templates, Glance images and TOSCA templates.
> There are many good OpenStack applications in the world which don't live
> in OpenStack App Catalog. However, let us for now concentrate on those
> which do, just for the sake of this discussion.
> *Introduction to OpenStack development ecosystem*
> OpenStack was introduced about 6 years ago. Over these years
> community grown significantly. There were 8 companies contributing to
> OpenStack in Austin (1-st release). In Mitaka (13-th release) there were 64
> companies contributing.
> One of the reasons for this growth is the set of sophisticated tools
> the OpenStack contributor ecosystem has chosen to use or build to
> enable collaboration:
> - software repositories: http://git.openstack.org/cgit/openstack/nova,
> http://git.openstack.org/cgit/openstack/neutron, ..
> - bug trackers: https://launchpad.net/nova, https://launchpad.net/neutron
> , ...
> - same instance of gerrit for all the projects for code review:
> https://review.openstack.org/
> - gating test infrastructure http://zuul.openstack.org/
> - common approach to release management, repositories management,
> naming, tons of other things managed by review in
> https://review.openstack.org/#/q/status:open+project:openstack/governance
> - IRC channels, etherpads, meetings and mailing lists
> - governance to manage all of the above
> All of the above is what we can call OpenStack collaboration ecosystem
> and it is a key factor for OpenStack community success.
> *Introduction to OpenStack apps development ecosystem*
> Now when OpenStack is mature and have it up and running is not a big
> deal, focus of community and customers shifts from "how do I get a running
> cloud" to "what do I do with running cloud".
> Use cases of different cloud users are very different, however one
> can identify and develop standard building blocks which can be reused by
> cloud users (service providers, DevTest teams, ...). Many cloud users want
> to contribute their homegrown apps upstream because:
> - it allows to other people to use it and improve it
> - community can implement missing parts
> - community can help with testing and maintaining an app
> Year ago we introduced Community App Catalog for OpenStack
> http://apps.openstack.org as an integration/distribution point of
> customer experience/apps. This initiative is successful, there are about
> 100 software assets of various kinds which can be run on OpenStack. For
> further growth we need to make several changes in a way we approach
> collaboration around OpenStack Apps. Namely, we need to provide an ability
> to apps developers to collaborate on application development.
> *OpenStack Community App Catalog is there, what else?*
> Community App Catalog http://apps.openstack.org allows to
> publish/consume apps to/from it.
> "The OpenStack Community App Catalog is designed to use the same tools
> for submission and review as other OpenStack projects. As such we follow
> the OpenStack development workflow" [0].
> To follow OpenStack development workflow, apps developers need to have:
> - dedicated repositories & code review system to collaborate on code
> - mailing lists, IRC channels, core reviewers teams
> - common approach to QA
> - governance model to manage all of the above
> Most of the above is missing for apps developers now.  App Catalog
> provides central place to store final artifacts (ready apps, like .exe
> files in Win world) but there is no centralized infrastructure to
> collaborate on development of source code of apps.
> Apps developers partially use infrastructure of OpenStack core
> projects (Heat & Murano) - repositories and bug trackers. Other than that
> they are on their own, there are no teams, no mailing lists, no IRC
> channels for apps developers - most of the items from the list above is
> missing.
> [0] https://wiki.openstack.org/wiki/App-Catalog#How_to_contribute
> *All right, we need to change something. What exactly?*
> 1.  We need to introduce a team which manages content of Community
> App Catalog, decides which new assets can be added, decides on a workflow
> for apps publishing, maintaining, consuming. This team could be a
> complimentary team working alongside the Community App Catalog
> implementation team (engine, backend, frontend); or within the team itself
> 2. There should be separated repositories for source code of apps
> from Community App Catalog. These repositories should not be stored
> under openstack label as they do not relate to core OpenStack projects.
> Core project teams are not responsible for maintaining apps.
> 3. Bug tracking for apps should be separated from bug tracking for
> core projects.
> 4. There should be teams working on apps with core reviewers, IRC
> channels and mailing lists. These teams should differ from core projects
> teams.
> 5. Given #1 - #4 it seems reasonable to develop governance model
> specific for OpenStack Apps Community, which differs (when it’s necessary)
> from governance model of OpenStack Community.
> Let us develop such a governance model, implement changes described
> above and build community of OpenStack apps developers.
> PS. There is representative discussion in comments to
> https://review.openstack.org/#/c/309383/. Some team wants to add new
> repository for CI/CD Murano app. Should it be part of Murano core project?
> Rather not. Should it be part of BigTent? Well, rather not as BigTent is
> for core OpenStack services, not for workloads on top of it. At the same
> time team wants to use some OpenStack infra resources (at least gerrit for
> now) as this project is obviously beneficial for OpenStack. We need to have
> an ability to resolve similar requests in a centralized manner - there are
> more teams who want to publish
> source code of their OpenStack apps and there is no established
> workflow for that.
> *Agree. What’s next?*
> Suggested plan:
> - Introduce label openstack-apps, put repositories with source code
> of OpenStack Apps under it, i.e.:
>   * http://git.openstack.org/cgit/openstack-apps/murano-apps
>   * http://git.openstack.org/cgit/openstack-apps/heat-templates
>   * http://git.openstack.org/cgit/openstack-apps/tosca-workflows
> - Agree with OpenStack Community App Catalog team on how content of
> App Catalog is managed and by whom
> - Describe workflow of how to add source code of new application
> to repositories, who approves its addition
> - Introduce simplified workflow of publishing new Application to
> the catalog:
>   * register/login
>   * push/update
>   * done
> - Introduce teams (core reviewers) contributing to/maintaining Murano
> apps, Heat templates, ...
> - Establish channels of communications with potential contributors
> (mailing list, meetings, IRC/slack channel, ... )
> - Agree with contributors on QA process for applications and how we
> track it in Community App Catalog
> To simplify commenting and tracking of the plan above I put last
> two sections with suggested steps to the etherpad
> https://etherpad.openstack.org/p/OpenStackAppsCommunity
> We're also discussing this topic with OpenStack Application Ecosystem
> Working Group and several members of OpenStack App Catalog team support
> this idea:
> http://lists.openstack.org/pipermail/user-committee/2016-May/000854.html
> Please share your thoughts and comments.
> Regards,
> Igor Marnat
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