Re: Fedora and PDC

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Hi, is it too late? I want to help as well.

On Fri, 2018-04-20 at 19:34 +0200, Pierre-Yves Chibon wrote:
> Good Morning Everyone,
> 
> We have been informed thst week at the upstream devs working on the
> product-definition-center (PDC) are moving away from the project and
> are going
> to leave it without a maintainer. Since we adopted PDC for a variety
> of data
> flows, this puts us in an awkward position. :(
> 
> Ralph and I met up on Tuesday to brainstorm the list of things we
> actively use
> PDC for today and to come up with a contingency plan for how to
> handle them. One
> overarching option is for us (fedora-infra) to take ownership of the
> PDC
> codebase as a whole. We didn't fully explore this option, figuring
> that the
> codebase is large and contains lots of tables, endpoints, and
> codepaths that we
> didn't use nor which we plan to use.
> 
> Instead, below we've got the four things we use PDC for and some
> options for
> what to do with each.
> 
> With the exception of /modules/, one common pattern that we like is
> to
> investigate splitting out the "django apps" that make up PDC into
> their own
> projects.  We're calling these "pdc-lite", for fun. See more below.
> 
> * Modules
>     The data in the /modules/ PDC endpoint is *also* in the MBS
> db.  Ralph's
>     team is going to just use that and stop using pdc anything for
> modules.
>     We're going to need to patch pungi, mbs for local builds, and a
> few other
>     places.  This should be a relatively low-pain transition.
> 
> * Stream branches, branch ownership, retirement dates?
>     - SLA/EOL are currently stored in PDC.
>     - Queried by releng scripts for retirement, fedrepo-req for new
> branches,
>       etc..
>     option #1
>       git repo full of yaml file similar to the override repo
>       compiled into a single JSON blob
>       Single place for all retired packages
>       This feels like the lowest tech option.
>       git gives us change control for free... but people easily get
> lost in the
>       "UX" of navigating a gigantic git repo full of plaintext files.
>     option #2
>       pagure's DB/API
>       pagure knows nothing about branches currently, so that would be
> bigger
>       lift
>     option #3
>       PDC internally is composed of ~20 "django apps"
>       https://github.com/product-definition-center/product-definition
> -center/tree/master/pdc/apps
>       We could pick the 2 or 3 that comprise the branches feature,
> copy them
>       out, and turn them into their own service: the "branch
> definition center":
>       BDC.
>       That would be the "pdc-lite" approach mentionned above, ie: PDC
> with only
>       the "app" of interest
> 
> * release/life-circle tracking?
>     option #1:
>       PDC lite with just that app of interest
>     option #2:
>       JSON/yaml file on the proxies
>     option #3:
>       pkgdb-lite
>     option #4:
>       ???
>   compose tracking?
>     impacted: fedfind
>     option #1:
>       PDC-lite with just that app of interest
>     option #2:
>       Drop this entirely?
>       Adam probably really wants to keep the record of composes.
>     option #3:
>       ???
> 
> The "pdc-lite" options are attractive, across the board.  One thing
> we get from
> this is greater clarity when discussing things formerly in PDC.  If
> something is
> in the branch-definition-center, the compose-definition-center, or
> the
> release-definition-center.. you know what you're talking
> about.  Today, when
> talking about whether or not something should be or is in "PDC", it
> is easy to
> get confused.
> 
> I propose we start the discussion on the list and plan for a meeting
> sometime
> late next week to discuss it further with the interested parties
> (please signal
> yourself)
> 
> 
> What do you think?
> 
> Pierre and Ralph
> 
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