feat(linux): add support on Linux for JDK 25 preview in Docker build configurations

[gounthar]

Summary

• Add comprehensive JDK 25 (early access) support across all image variants
• Standardize compression arguments and module path configuration

Changes Made

JDK 25 Support

• New build targets: Added JDK 25 variants for Alpine, Debian (bookworm), Debian Slim, and RHEL UBI9
• Build configuration: Updated docker-bake.hcl with JDK 25 targets across all supported platforms
• Java version: Set default JDK 25 version to 25+9-ea-beta
• Module optimization: Implemented selective module inclusion for JDK 25 using configurable JLINK_MODULES_DEFAULT

Build System Improvements

• Standardized arguments: Updated jlink argument handling to use "$@" for proper parameter expansion
• Platform support: JDK 25 images available on amd64, arm64, s390x, and ppc64le where applicable
• Compression consistency: Applied zip-6 compression for both JDK 21 and JDK 25

Platform Support

Variant	JDK 17	JDK 21	JDK 25
Alpine	✅ amd64 only	✅ amd64, arm64	✅ amd64, arm64
Debian	✅ all platforms	✅ all platforms	✅ all platforms
Debian Slim	✅ amd64 only	✅ amd64, arm64	✅ all platforms
RHEL UBI9	✅ amd64, arm64, ppc64le	✅ amd64, arm64, ppc64le	✅ amd64, arm64, ppc64le

Testing done

make build

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[lemeurherve]

Question: what's the purpose of having two variables for jlink modules?

[gounthar]

The goal was to have JLINK_MODULES configurable via the command line if needed, but it may be unneeded complexity. 🤔

[lemeurherve]

On 22 tests, 9 failures: https://ci.jenkins.io/job/Packaging/job/docker/job/PR-2072/13/testReport/

I suggest using make test-debian_jdk25 for example to test on your side 😉

[gounthar]

Strange, all was working fine on my end when I last committed... 🤔

[lemeurherve]

Strange, all was working fine on my end when I last committed... 🤔

Cf your current "testing done", I don't doubt make build passed, but did you tried make test?

If not, can you try it now please?

[lemeurherve]

I found out Jenkins controller isn't compatible with Java 25 yet cf jenkins-infra/jenkins.io#8458 (comment)

As this might take some time, maybe close this PR meanwhile and restart a fresh one when compatible?

[gounthar]

I had make build work on my machine, but I guess I also had the locally built controller images with JDK25 too. 🤔
If that's not the case, then I don't know what happened. Frankly, make build is the very least I can do before creating a PR. 🤷

[lemeurherve]

I had make build work on my machine, but I guess I also had the locally built controller images with JDK25 too. 🤔

Getting the docker image to build is one thing, getting it to work and passes tests is what matters 😉

Have you tried make test?

EDIT:

If that's not the case, then I don't know what happened. Frankly, make build is the very least I can do before creating a PR. 🤷

You can (I'd even say "have to") run tests locally before submitting a pull request for review.