CI on forked projects: Darwin woes

[Iavor Diatchki]

I think there was the ghc-devops-group list, but I don't know if it is
still active, and I kind of like to not have to follow too many lists.

For example, I had also not realized that it is an option to push to
branches on the main project, and have been using my own fork,
so thanks for posting this here!

-Iavor


On Wed, May 8, 2019 at 11:40 AM Kevin Buhr <buhr at asaurus.net> wrote:
>
> Over the past few days, I've submitted several merge requests from
> branches on my forked project (mostly because I didn't even realize
> pushing to a branch on the main project was an alternative).
>
> When those MRs run under CI, I've had a bunch of failures due to
> timeouts waiting on a darwin-x86_64 runner.  I was a little mystified
> that no other pipelines besides mine seemed to be having this problem,
> but I've come to understand that MRs submitted from branches on the main
> project use a different, larger set of runners than the shared runners
> used by MRs from branches on forked projects.
>
> Under my project, I can view the available shared runners under the
> "Settings" -> "CI/CD" -> "Runners" tab, and the problem seems to be that
> there's only one darwin runner ("b4bc6410" /
> mac-mini-x86_64-darwin-davxkc).  This machine is a trooper, but it
> unfortunately shares a circuit breaker with a toaster oven, so it goes
> offline every time someone wants a bagel, and the rest of the time it
> must be running CI for a few hundred GHC forks.
>
> I ended up deleting an (unreviewed) MR sourced from my branch, and
> pushing it to the main project and resubmitting just to get the CI to
> run.  (Admittedly, it failed, but at least not on darwin!)  I obviously
> don't want to do this with the merge requests that have already been
> reviewed.
>
> Is this a temporary problem?  Is there anything I can do other than keep
> retrying the darwin jobs every couple days?
>
> Also, is there a better place than "ghc-dev" to send these sorts of
> GitLab/CI issues?  I thought there might be a project dedicated to it,
> but if so I couldn't find it.
>
>
> --
> Kevin Buhr <buhr at asaurus.net>
>
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