Add alpine arm64 docker image builds

[nbr23]

What feature do you want to see added?

Hi!

Could we build the arm64 variant for the alpine based image of the agent?
I think it might just be a matter of adding alpine to the linux-arm64 group in docker-bake?
Looks like we might have a dependency on this first #397

Thanks!

Upstream changes

No response

[dduportal]

It not possible for now: adoptium/containers#158 (comment) means that temurin is not available yet, even for JDK21 alpine aarch64.

[gounthar]

Temurin is already providing nightly builds of JDK21 for aarch64/alpine. However, it's important to note that these builds are nightly builds, which means they are not official stable releases.

Additionally, it's worth mentioning that Jenkins does not currently offer official support for JDK21. So, if we decide to provide a Docker image for it, we would be ahead of the curve compared to the official support status.

That being said, this doesn't necessarily mean we shouldn't provide such an image. It could be a proactive step that allows us to re-integrate Alpine for aarch64 as soon as it becomes officially available. 🤔

I know, I know, the next logical step would be for me to propose a PR so that we know if that can be done harmlessly. 🤣

[dduportal]

Good news! Thanks @gounthar for the explanation!

And by the ay, thanks @nbr23 for raising this issue and searching context! Would you be willing to help?

[nbr23]

This all sounds good to me!
Happy to help in any capacity I can yes, let me know what I can do!

Thx!

[dduportal]

This all sounds good to me! Happy to help in any capacity I can yes, let me know what I can do!

Thx!

@nbr23 a first step would be to introduce an initial set of JDK21 "experimental" images on jenkinsci/docker-agent for debian and alpine.

Same idea as the JDK21 experimental introduction for the controller image with the -preview tags.

Good news: the addition of a new JDK should be simpler with agent images.

[dduportal]

Thanks for #492 @nbr23 !

The release 3148.v532a_7e715ee3-4 is currently being published in the DockerHub: you can start the work on jenkinsci/docker-inbound-agent now.

[dduportal]

Aaaand it's implemented and available:

Please note that there are NO guarantuee that Temurin project will keep delivering an alpine arm64 JDK21 in the future : if they don't, the alpine arm64 image of the Jenkins agents will be discontinued.

Thanks for the contributions @nbr23 and @gounthar

[nbr23]

Sorry, was AFK today, but I see @gounthar was on fire and finished my job and much more! Thanks so much everyone, what an amazing turnaround time!