#2393 add multi-arch-image support

[KugelLibelle]

Beschreibung:

Dieser PR fügt Multi-Arch-Unterstützung (AMD64 und ARM64) für alle Container-Images hinzu.

Änderungen:

• Alle drei callable Workflows für Container-Image-Erstellung wurden angepasst:
  • callable-create-github-container-image.yml
  • callable-create-github-container-image_java21.yml
  • callable-create-github-container-image-frontend.yml
• QEMU und Docker Buildx Setup hinzugefügt
• Platform-Parameter auf linux/amd64,linux/arm64 gesetzt

Bei der Umsetzung wurde sich an der offiziellen Dokumentation orientiert.
Die Commits zum Pinnen der Workflow-Versionen wurden aus den jeweils neuen Versions-Tags geholt: QEMU und Buildx

Es wurde im Vorfeld überprüft, dass alle Base-Images die in den Dockerfiles genutzt werden, Multi-Arch-Images sind:

• JDK17: registry.access.redhat.com/ubi8/openjdk-17:latest@sha256:a08703024a431617209636f80c3ccc172c7ea414187679f03b05d0dd81516bbf
• JDK21: registry.access.redhat.com/ubi9/openjdk-21-runtime:1.24-2.1767878250@sha256:84a136ce036ebde3adc502c84c39f22bd4bf14ca387a3825cf3e1c7ae26c0942
• NGINX: registry.access.redhat.com/ubi9/nginx-124:9.7-1767846424@sha256:a75f10d71969dd2451914df6539dea28f8e2c88506f691ea211768a0bd0746d1

-> Getestet werden kann das mit docker buildx imagetools inspect <image>:<tag>

Vorteile:

• Deutlich bessere Performance auf ARM-Geräten
• Stack-Startup-Zeit halbiert sich im Test auf ARM (von 2:30 Min auf ~60 Sek)
• Geringere CPU-Auslastung im laufenden Betrieb
• Keine Emulation mehr notwendig

Review-Hinweise:

Die Workflows bauen nun für beide Architekturen. Die Build-Zeit in der CI/CD-Pipeline wird sich dadurch etwas erhöhen, da beide Architekturen gebaut werden müssen.
Durch Caching könnte man die Build-Zeit bei Bedarf wieder reduzieren.

Ich habe einen der Workflows zum Testen in meinem Fork ausgeführt, das erstellte Image ist Multi-Arch:

Zum Testen: docker buildx imagetools inspect ghcr.io/kugellibelle/wahllokalsystem-wls-auth-service@sha256:d281f74b63719e2aaeb99632e674b9de02b13cfe852db127a5ae2d1e7bcdb9cf

Definition of Done (DoD):

Dokumentation

• Doku aktualisiert
• Texte auf Rechtschreibung und Grammatik geprüft

Referenzen:

Closes #2393

Summary by CodeRabbit

• Chores

  • Enabled multi-architecture container image builds, now supporting both AMD64 and ARM64 platforms for broader hardware compatibility.

• Documentation

  • Updated documentation to reflect the availability of multi-architecture container images.

[coderabbitai]

📝 Walkthrough

Walkthrough

Three GitHub Actions workflow files are modified to enable multi-architecture Docker image builds by adding QEMU and Docker Buildx setup steps prior to the build process, and configuring the build-push-action to target both linux/amd64 and linux/arm64 platforms. Documentation is updated to reflect the new multi-arch image outputs in the artifact descriptions.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: adding multi-arch image support for container builds.
Description check	✅ Passed	The description covers the main changes, implementation details, testing information, and documents a partial Definition of Done section, though DoD sections are incompletely marked.
Linked Issues check	✅ Passed	The PR fully addresses the requirements from issue #2393 by implementing multi-arch support (linux/amd64 and linux/arm64) for all container images with QEMU and Docker Buildx setup.
Out of Scope Changes check	✅ Passed	All changes are directly related to implementing multi-arch image support as specified in issue #2393; no unrelated modifications detected.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

No actionable comments were generated in the recent review. 🎉

🧹 Recent nitpick comments

.github/workflows/callable-create-github-container-image.yml (1)

79-86: Consider adding build cache to offset the increased multi-arch build time.

The PR notes that build duration increases since both architectures are now built. The build-push-action supports GitHub Actions cache integration which can significantly reduce rebuild times.

♻️ Suggested cache configuration

       - name: Build and push image
         uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         with:
           context: ./${{ inputs.service }}
           platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

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