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Oracle and Temurin JDKs in series 25 and 27, with ZGC enabled, slim jlink runtimes for downstream images, and optional JMX metrics.
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Damián Búho 8c88921bbb
 build(workflows): enable zstd in artifacts
2026-10-26 14:24:33 -03:00
.compose chore: init 2026-08-05 23:38:17 -03:00
.container feat(container): publish temurin-27 for riscv64 2026-10-25 16:20:32 -03:00
.forgejo/workflows build(workflows): enable zstd in artifacts 2026-10-26 14:24:33 -03:00
.github/workflows build(workflows): enable zstd in artifacts 2026-10-26 14:24:33 -03:00
.makefile feat(container): publish temurin-27 for riscv64 2026-10-25 16:20:32 -03:00
docs docs(features): sync the b19/ubuntu feature fragments 2026-10-25 16:20:50 -03:00
LICENSES chore: init 2026-08-05 23:38:17 -03:00
scaffold perf(container): declare M6E_VERSION next to the user stage 2026-10-08 02:08:29 -03:00
.claudeignore chore: sorting for claudeignore 2026-09-13 12:48:03 -03:00
.containerignore build: ignore .worktrees (oci/docker) 2026-09-29 23:59:07 -03:00
.dockerignore build: ignore .worktrees (oci/docker) 2026-09-29 23:59:07 -03:00
.gitattributes chore: clean j2 from attributes 2026-09-14 00:36:22 -03:00
.gitignore build: ignore .worktrees 2026-09-29 23:56:05 -03:00
.gitmodules build: hard .gitmodules before big refactoring of m6e 2026-09-02 18:39:50 -03:00
.yamllint chore(makefile): sync m6e submodules 2026-09-18 00:18:52 -03:00
AGENTS.md feat(container): publish temurin-27 for riscv64 2026-10-25 16:20:32 -03:00
AI_POLICY.md chore(style): unify project naming schema 2026-09-13 14:45:11 -03:00
CITATION.cff chore(version): 0.8.0 2026-10-26 04:25:31 -03:00
CLAUDE.md chore: init 2026-08-05 23:38:17 -03:00
CODE_OF_CONDUCT.md chore(style): unify project naming schema 2026-09-13 14:45:11 -03:00
CODEOWNERS chore: init 2026-08-05 23:38:17 -03:00
CONTRIBUTING.md chore: regenerate contributing 2026-09-30 06:39:12 -03:00
Dockerfile fix(deps): default the Java series to 27 2026-10-20 21:42:36 -03:00
lefthook.yaml chore: regenerate lefthook.yaml 2026-09-29 22:28:38 -03:00
LICENSE chore: init 2026-08-05 23:38:17 -03:00
Makefile fix(deps): default the Java series to 27 2026-10-20 21:42:36 -03:00
projectfile.yaml chore(version): 0.8.0 2026-10-26 04:25:31 -03:00
README.md feat(container): publish temurin-27 for riscv64 2026-10-25 16:20:32 -03:00
SECURITY.md chore(style): unify project naming schema 2026-09-13 14:45:11 -03:00
SUPPORT.md feat(forge): declare and publish to GitHub 2026-09-15 02:38:29 -03:00

README.md

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B19 / Java

Oracle and Temurin JDKs in series 25 and 27, with ZGC enabled, slim jlink runtimes for downstream images, and optional JMX metrics.

Stand with Ukraine Projectfile inside License PRs welcome REUSE compliance

Project status Last commit on GitHub Last commit on kiota.ch

Publish pipeline on GitHub Vulnerability audit on GitHub Dependency freshness on GitHub Analysis sweep on GitHub

Publish pipeline on kiota.ch Vulnerability audit on kiota.ch Dependency freshness on kiota.ch Analysis sweep on kiota.ch

Features

  • Runtime CA certificate import
  • Compromised certificate authorities removed from the JDK truststore
  • JDK from upstream tarball with distribution choice
  • Opt-in Prometheus metrics via JMX
  • Production-tuned JVM flags
  • Slim Java runtime for application images

It also inherits the features of B19 / Ubuntu — see Features for the full list.

What this provides

  • Container image ghcr.io/damian-buho/b19/java:oracle-25
  • Container image ghcr.io/damian-buho/b19/java:oracle-27
  • Container image ghcr.io/damian-buho/b19/java:temurin-25
  • Container image ghcr.io/damian-buho/b19/java:temurin-27
  • Container image damianbuho/b19-java:oracle-25
  • Container image damianbuho/b19-java:oracle-27
  • Container image damianbuho/b19-java:temurin-25
  • Container image damianbuho/b19-java:temurin-27

Installation

Pull the published container image:

Pull from GHCR — linux/amd64, linux/arm64, linux/riscv64

docker pull ghcr.io/damian-buho/b19/java:oracle-25

Pull from DockerHub — linux/amd64

docker pull damianbuho/b19-java:oracle-25

Distribution: oracle | temurin

Series: 25 | 27

Stable releases also publish X.Y.Z, X.Y and X tags — pull the precision you want to pin.

If the registries above are unreachable, pull from the origin instead:

Pull from Kiota — linux/amd64

docker pull kiota.ch/b19/java:oracle-25

Distribution: oracle | temurin

Series: 25 | 27

Usage

Build on top of this image:

From GHCR

FROM ghcr.io/damian-buho/b19/java:oracle-25

From DockerHub

FROM damianbuho/b19-java:oracle-25

Distribution: oracle | temurin

Series: 25 | 27

For the recommended multi-stage pattern and the build-hook system (build.d), scaffold a derivative with b19/scripts/scaffold.sh from m6e/b19.

Building

Clone the repository with its submodules:

git clone --recurse-submodules https://github.com/damian-buho/b19-java java && cd java

Build the container image locally:

make container-build

Run make with no arguments for the default target; run make help to list every target.

For the local dev loop, make dev-container brings up the dev-container.

Pipeline entry points:

  • make analyzed — Run the heavy analysis sweep (mutation testing, benchmarks)
  • make audited — Re-scan the pinned dependencies and published artifacts for new vulnerabilities
  • make check-outdated — Report every pinned dependency that lags upstream
  • make release-is-ready — Run the pseudo-CI pipeline locally — build, test and scan, without publishing

Documentation

Policies

Links

License

This project is licensed under MIT — see the LICENSE file for details.