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From Andrey Redko <>
Subject Re: Infrastructure setup / CI
Date Tue, 04 Sep 2018 15:31:07 GMT
Hey Zoltán,

Indeed, you have brought a lot of great points to discuss!

I hope other guys will correct me if I am wrong, but as per, the
repositories should be hosted by Apache or on Github under Apache
organization. The latter should be fine, right?

Regarding CI, most project use Jenkins (, the is the source for CI infra for ASF. Would it work for you
guys (assuming the help with configuring Jenkins will be surely offered).

What do you think?

Best Regards,
    Andriy Redko

On Tue, Sep 4, 2018, 4:35 AM Zoltán Nagy <> wrote:

> Hey folks,
> So great to send a mail to a list whose address includes both Zipkin and
> Apache :)
> Watch out, wall of text incoming. There's a lot of context here.
> After reading the previous mail threads (still before the list), and some
> discussion with Andrew (whom Adrian introduced, and was a great help, are
> you here, Andrew?), I'm starting to have an outline of infrastructure-y
> things that need to happen.
> Most of these are pretty straightforward, and I'll try to capture existing
> stated preferences – do shout if I'm telling a lie.
>    - *Git repository hosting*. OpenZipkin people AFAIK would prefer staying
>    on GitHub if at all possible. This would imply setting up syncing to ASF
>    git hosting. seems to be a solution to this
>    whole can of worms, though I didn't look too deeply yet.
>    - Release automation may need to be extended for the required *voting
>    process* – or maybe just leave it up to human process, don't change the
>    automation.
>    - We'll need to set up *automated notification e-mails* about commits,
>    releases, that kind of stuff. For commits, it should come out of the box
>    with the Git setup, and should be easy to add to the release automation.
>    This is probably best done with a separate notifications@ list.
> Now for the hard part: *CI*. Travis seems to be supported by ASF, but
> CircleCI is not, and various OpenZipkin projects currently use one, the
> other, or even both. ASF apparently also has a hosted Jenkins server (which
> I can't find ATM).
> *A question to mentors*: what other CI options are available under the ASF
> umbrella? Links to the various solutions or documentation for them would be
> especially appreciated, so we can evaluate them properly.
> *A question to OpenZipkin folks*: what's your current take on our CI setup?
> Here too, let me share the perspectives I've heard so far, call out any
> mistakes I make:
>    - Travis sometimes has stability problems (more often than “rarely”, but
>    more rarely than “often”, and more often than Circle)
>    - Circle is somewhat more featureful and stable, but is severely limited
>    in the number of free executors (and again, is not currently
> ASF-approved)
>    - The less we need to care about CI, the better – that includes ongoing
>    maintenance, mental / process overhead when making changes, and cost of
> any
>    migration
>    - This one's mostly from me: there's a lot of duplication between the
>    build definitions of our various projects, not to mention the overhead
> of
>    “supporting” both Travis and Circle. For example, I know Jenkins has
>    standard tools to deduplicate parts of build definitions (namely, shared
>    libraries for pipelines); I don't know of similar solutions for Travis
> (and
>    am happy to be pointed at some / do more research).
> I'd say using a single CI system is more of a “when”, rather than a
> “whether” type of question. It then boils down to a trade-off between the
> cost of migration, and the perceived value of the new system. Some possible
> scenarios:
>    - We decide to minimize the cost of migration, and move Circle builds to
>    Travis. Later on, we might look into deduplicating build logic between
> jobs.
>    - We push for ASF to accept CircleCI (note, with no guarantee of success
>    at this point), including funding for more executors if needed (or try
> to
>    start a collaboration with Circle so that ASF projects get more
> executors),
>    and migrate Travis jobs to Circle.
>    - We decide to maximize perceived value, by choosing a third option
>    (non-Travis, non-Circle) that helps DRY our build definitions, while
> also
>    keeping it easy to make per-project changes as needed. I'd recommend
>    leading a project like this with a PoC and evaluating the results there,
>    before migrating all N>10 projects and pouring effort into finalizing
> the
>    shared abstraction layer.
> EOF wall of text. To recap, I'm super interested in what other CI options
> are available under ASF (so that we know what to even think about), any
> other recommendations our beloved mentors might have given all this, and
> preferences / arguments / corrections from Zipkin folks.
> Cheers!
> --
> Zoltán Nagy

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