Re: Proposal for Incubation in the Extensions PMC: MultiApps

Zach Robinson

Excited to see this proposed Nikolay!

Nikolay has been sharing this project with some of the core teams over the last couple of months.  We have even been giving some thought to adopting some of the behaviors and/or code from this extension into core CF.

Some aspects I think are especially interesting:
- declarative manifest behavior
- an opinionated packaging structure
- deployment orchestration

CAPI is especially excited to see whether the community takes to some of this tooling as potential guidance for future roadmap.

CAPI Project Lead

On Tue, Mar 20, 2018 at 9:35 AM Nikolay Valchev <nikolay.valchev@...> wrote:

Hi All,


SAP is proposing MultiApps (aka CF MTA deploy service) for inclusion in the Extensions PMC as a new incubating project.

MultiApps is envisioned to provide the missing higher-level lifecycle management capabilities for distributed applications in Cloud Foundry. It proposes a new declarative application model and corresponding tools helping developers achieve the following goals:

  1. Describe explicitly the structure of my application, its constituent CF-apps, routes, services and other technical artifacts. Tools, interpreting this model, would automate deployments, achieving unified lifecycle of all application components and ensuring the consistency and completeness of the distributed application.   
  2. Declare the resources (e.g. service instances or APIs from other apps) my application depends on at runtime and/or deployment time. Tools would then check existence of required service instances, possibly allocating the missing ones and making the needed app bindings. Additionally tools would resolve dependent apps API information and inject it in requiring app env.
  3. Declare configuration variables (and their relations) which distinguish different deployments of my application. Tools would bind sub-components, automate deployment based on default settings, or request missing mandatory values interactively.

MultiApps is currently available on GitHub [1].



Project Name: MultiApps

Project Proposal: See [2].

Proposed Project Leads: Nikolay Valchev, SAP

Proposed Scope: See [2]

Development Operating Model: Dedicated committers (local)

Technical Approach: CF CLI plugin and server application automating lifecycle operations

Please let us know if you have any questions or feedback.


Best regards,

Nikolay Valchev

Development Architect and Product Owner, SAP





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