[ruby-core:103258] [Ruby master Misc#17720] Cirrus CI to check non-x86_64 architecture cases by own machines

Issue #17720 has been updated by jaruga (Jun Aruga).


fkorotkov (Fedor Korotkov) wrote in #note-3:
> Hello there,
> 
> I'm founder of Cirrus CI and will be happy to answer any of your questions and help you in any capacity.
> 
> Cirrus persistent workers are implemented via Cirrus CLI[1] which is written in Go so we can support any target that Go can compile to. If you'll find anything missing please also let me know so we can implement it for you.
> 
> [1] https://github.com/cirruslabs/cirrus-cli

Hi @fkorotkov, thanks for finding our Ruby project! Possibly we will let you know when we need your help.



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Misc #17720: Cirrus CI to check non-x86_64 architecture cases by own machines
https://bugs.ruby-lang.org/issues/17720#change-91341

* Author: jaruga (Jun Aruga)
* Status: Assigned
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
Hello!

This ticket is related to the tickets #16234 #16360. But I opened a new ticket because it is related to general non-x86_64 architecture CI cases.

I have a suggestion.

I see the `.travis.yml` was removed [1], and I also saw another open source project remove their `.travis.yml` because they could not get the credits to continue to run Travis [2]. I feel Travis is not really a possible option for every open source project for now.

While we have RubyCI, I think we still have a motivation to run a CI on non-x86_64 architectures at a pull-request timing. So, I investigated alternative CI. When checking GitHub Actions, I do not feel it will happen soon on GitHub Actions [3]. Then I found an interesting CI called "Cirrus CI", that might enable us to run CI on non-x86_64 architectures such as Mac M1 (arm) ppc64le and s390x beyond the cloud.

Cirrus CI has 2 types of features: "cloud" and "persistent workers". I see the Cirrus CI "cloud" feature has been used in the QEMU and podman projects [4][5]. It has a unique freeBSD host. However the remarkable feature for the Ruby project is the "persistent workers" [6] announced a few months ago, that is beyond the cloud. Because this feature enables us to use our own machines as a CI running host. You can see the examples running the CI with the machines such as Mac M1, iPhone, ppc64le and s390x on the page [6]. Maybe the used machine does not even have the global static IP. You can see other articles [7][8] too.

I can see some benefits to start Cirrus CI for the Ruby project.

* Possibly we can check Mac M1 (arm), ppc64le, s390x cases using machines used in RubyCI [9] and someone's machine such as @ReiOdaira's ppc64le/s390x machines at the pull-request timing.
* When we face the CI issue, we can login to the machine and use the interactive debugging tool such as gdb to fix it.
* The config file is YAML format and it has the matrix feature [10]. We are familiar with the YAML and matrix.

What do you think? Positive or negative?
Thank you.

[1] ruby removed .travis.yml: https://github.com/ruby/ruby/commit/6b978d542704a5614af5e9375c4b31b8d2618652
[2] simde removed .travis.yml: https://github.com/simd-everywhere/simde/commit/17a27e7f2c3114225899f2ace14010cbbb2139b5
[3] GitHub Actions and ppc64le: https://github.community/t/self-hosted-runner-on-ppc64el-architecture/155337
[4] QEMU: https://gitlab.com/qemu-project/qemu/-/blob/master/.cirrus.yml
[5] Podman: https://github.com/containers/podman/blob/master/.cirrus.yml
[6] The issue ticket of Persistent Workers: https://github.com/cirruslabs/cirrus-ci-docs/issues/263#issuecomment-746900845
[7] Persistent Workers blog: https://medium.com/cirruslabs/announcing-public-beta-of-cirrus-ci-persistent-workers-7327a38004be
[8] Persistent Workers guide: https://cirrus-ci.org/guide/persistent-workers/
[9] RubyCI: https://rubyci.org/
[10] Cirrus CI matrix feature: https://cirrus-ci.org/guide/writing-tasks/#matrix-modification




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