Re: PDC replacement proposal

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On Tue, Sep 05, 2023 at 11:35:19AM -0700, Kevin Fenzi wrote:
> On Mon, Sep 04, 2023 at 04:51:22PM +0200, Tomas Hrcka wrote:
> > Hello all, it took us a few years but we are finally getting rid of the PDC
> > project. Thanks to the ARC research we identified use cases in our tooling
> > and proposed solution.
> > 
> > The essential functionalities currently provided by PDC will be
> > re-implemented in other applications within our release infrastructure, as
> > there are no immediate plans for their replacement and are currently
> > maintained
> > 
> > This work is anticipated to span several months for completion. However,
> > before we embark on this endeavor,
> > 
> > we would like to proactively share our proposed solution with all of you
> > and gather your valuable feedback.
> > 
> > Below, we outline our strategy to preserve the core functionality of PDC by
> > leveraging existing applications within our ecosystem.
> > 
> > Current uses of PDC:
> > 
> > Currently, we rely on the Package Database (PDC) for various data
> > management tasks, including:
> > 
> > 
> >    1.
> > 
> >    Critical Path Package Tracking: Bodhi leverages PDC to track packages on
> >    the critical path.
> 
> As Adam mentioned this is already not in pdc. ;) 
> 
> >    2.
> > 
> >    Retirement of Packages and Service Level Agreements (SLAs): PDC assists
> >    in managing the retirement of packages and their associated SLAs.
> 
> Yeah. The super big one is that its queried from a git commit hook for
> all src.fedoraproject.org git commits. Right now if pdc is down, no one
> could commit anything. 
> 
> 
> >    3.
> > 
> >    Metadata for Nightly Composes: Our Release Engineering and Fedora
> >    Quality Assurance teams rely on PDC for metadata related to nightly
> >    composes.
> > 
> > 
> > More info on the usage can be found here:
> > https://fedora-arc.readthedocs.io/en/latest/pdc/users.html
> 
> mass rebuild of modules can be dropped. ;) 
> 
> fedscm-admin is now the scm requests toddler. It still uses pdc tho
> of course. 
>  
> > Specific Endpoints in Use:
> 
> ...snip...
> 
> > Upcoming Changes
> > 
> > Bodhi:
> > 
> > Bodhi will assume responsibility for the following tasks, reducing our
> > reliance on PDC:
> > 
> > /rest_api/v1/releases/: Bodhi will now manage release-related data.
> 
> Do note that bodhi still has a window after we are 'go' for a relase
> where it thinks it's released, but it's not yet. We probibly need to
> address this if we are moving this to bodhi.
> 
> > /rest_api/v1/component-branches/: Specifically, Bodhi will handle the
> > critical-path flag.
> 
> Already done. 
> 
> ...snip...
> > 
> > Pagure-dist-git:
> > 
> > Pagure-dist-git will take over several responsibilities from PDC, including:
> > 
> > /rest_api/v1/product-versions
> > 
> > /rest_api/v1/global-components
> > 
> > /rest_api/v1/component-branches/
> > 
> > /rest_api/v1/component-branch-slas/
> > 
> > Pagure already has a robust database of global components (repositories)
> > and product versions (repository branches).
> > 
> > It utilizes the PDC API to query component branches when a package is
> > retired, and an auxiliary table in Pagure-dist-git will store the reasons
> > for orphaning these components.
> 
> So, I know this will work... but it means more closely tying ourselves
> to pagure-dist-git. ;( 
> 
> With modules going out of the picture, most branches just have the
> release cycle of the fedora or rhel release they are based on, so
> couldn't we just default that somewhere?

In the pkgdb time, the EOL status was basically simply computed from the release
status, ie: what we still have at: https://admin.fedoraproject.org/pkgdb/api/collections
(looks like we should fix the branchname in that json)
but we could just go back to this :)


Pierre

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